ENERGY AUDIT FINAL REPORT

Transcription

1 ENERGY AUDIT FINAL REPORT Anchorage School District Facilities/Maintenance Building 1301 Labar Street Anchorage, AK p (907) AkWarm ID no. CIRI ANC CAEC F Street Anchorage, AK p (907) f (907) Contact: Walter K. Heins, PE, CCP, CxA, CEA Lakefront Drive Soldotna, Alaska p (907) Contact: Jerry P. Herring, PE, CEA

2 Contents I. Executive Summary... 1 II. Introduction... 5 III. Energy Audit Process... 6 IV. Method of Analysis... 7 V. Facilities/Maintenance Building Description... 8 V.I FACILITIES/MAINTENANCE ARCHITECTURAL DESCRIPTION... 8 V.II FACILITIES/MAINTENANCE MECHANICAL DESCRIPTION... 8 V.IIV FACILITIES/MAINTENANCE ELECTRICAL DESCRIPTION... 9 VI. Portable Buildings Description VI.I PORTABLES ARCHITECTURAL DESCRIPTION VI.II PORTABLES MECHANICAL DESCRIPTION VI.III PORTABLES ELECTRICAL DESCRIPTION VI.IV PORTABLES MODELING DESCRIPTION VII. Historic Energy Consumption and Cost VII.I ELECTRICAL CONSUMPTION DATA VII.II NATURAL GAS CONSUMPTION DATA VII.III OVERALL ENERGY CONSUMPTION DATA VIII. Equipment Inventory and Photo Survey IX. Energy Conservation Measures IX.I FACILITIES/MAINTENANCE BUILDING IX.II PORTABLE BUILDINGS IX.III ADMINISTRATIVE CONTROLS FOR ENERGY CONSERVATION AND OPTIMIZATION Appendices Appendix A Energy Benchmark Data Appendix B AkWarm Commercial Reports Appendix C Major Equipment List Appendix D Energy Conservation Measures Appendix E Site Visit Photos Appendix F Thermographic Photos Appendix G - AkWarm Model of Portable Building Coffman Engineers, Inc. 6/11/2012 i AkWarm No. CIRI-ANC-CAEC-01

3 Abbreviations AHFC ARRA ASD ASHRAE BTU CCF CFM DDC ECI ECM EPDM EUI F HP HPS HVAC IPLC kwh LED O&M sf SIR V W Alaska Housing & Finance Corporation American Recovery & Reinvestment Act Anchorage School District American Society of Heating, Refrigeration, and Air-Conditioning Engineers British Thermal Unit One Hundred Cubic Feet Cubic Feet per Minute Direct Digital Control Energy Cost Index Energy Conservation Measure Ethylene Propylene Diene Monomer Energy Utilization Index Fahrenheit horsepower High Pressure Sodium Heating, Ventilating, and Air-Conditioning Integrated Power & Load Circuit kilowatt-hour Light-Emitting Diode Operations & Maintenance square feet Savings-to-Investment Ratio Volts Watts Coffman Engineers, Inc. 6/11/2012 ii AkWarm No. CIRI-ANC-CAEC-01

4 List of Figures 1. Energy Audit Clients 2. Energy Benchmark Data 3. Anchorage, AK Google Maps 4. ASD Facilities/Maintenance Building and Portables Google Maps List of Tables 1. Recommended Energy Conservation Measures Student Transportation 2. Recommended Energy Conservation Measures Portable Building 3. Portable List 4. Energy Cost and Consumption Data Coffman Engineers, Inc. 6/11/2012 iii

5 REPORT DISCLAIMER Privacy The information contained within this report, including any attachment(s), was produced under contract to Alaska Housing Finance Corporation (AHFC). IGAs are the property of the State of Alaska, and may be incorporated into AkWarm-C, the Alaska Retrofit Information System (ARIS), or other state and/or public information systems. AkWarm-C is a building energy modeling software developed under contract by AHFC. Limitations of Study This energy audit is intended to identify and recommend potential areas of energy savings, estimate the value of the savings, and provide an opinion of the costs to implement the recommendations. This audit meets the criteria of a Level 2 Investment Grade Audit (IGA) per the American Society of Heating, Refrigeration, Air-conditioning Engineers (ASHRAE) and the Association of Energy Engineers (AEE), and is valid for one year. The life of the IGA may be extended on a case-by-case basis, at the discretion of AHFC. In preparing this report, the preparers acted with the standard of care prevalent in this region for this type of work. All results are dependent on the quality of input data provided. Not all data could be verified and no destructive testing or investigations were undertaken. Some data may have been incomplete. This report is not intended to be a final design document. Any modifications or changes made to a building to realize the savings must be designed and implemented by licensed, experienced professionals in their fields. Lighting upgrades should undergo a thorough lighting analysis to assure that the upgrades will comply with State of Alaska Statutes as well as Illuminating Engineering Society (IES) recommendations. All liabilities for upgrades, including but not limited to safety, design, and performance are incumbent upon the professional(s) who prepare the design. Coffman Engineers, Inc (CEI) and Central Alaska Engineering Company (CAEC) bear no responsibility for work performed as a result of this report. Financial ratios may vary from those forecasted due to the uncertainty of the final installed design, configuration, equipment selected, installation costs, related additional work, or the operating schedules and maintenance provided by the owner. Furthermore, many ECMs are interactive, so implementation of one ECM may impact the performance of another ECM. CEI and CAEC accept no liability for financial loss due to ECMs that fail to meet the forecasted financial ratios. The economic analyses for the ECMs relating to lighting improvements are based solely on energy savings. Additional benefits may be realized in reduced maintenance cost, deferred maintenance, and improved lighting quality. The new generation lighting systems have significantly longer life leading to long term labor savings, especially in high areas like Gyms and exterior parking lots. Lighting upgrades displace re-lamping costs for any fixtures whose lamps would otherwise be nearing the end of their lifecycle. This reduces maintenance costs for 3-7 years after the upgrade. An overall improvement in lighting quality, quantified by numerous studies, improves the performance of students and workers in the built environment. New lighting systems can be designed to address all of the above benefits. US Government Disclaimer: This material is based upon work supported by the Department of Energy under Award Number DE-EE This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Coffman Engineers, Inc. 6/11/2012 iv

6 I. Executive Summary This report presents the findings of an energy audit conducted at the Anchorage School District (ASD) Facilities/Maintenance (F/M) complex as part of a contract for: Alaska Housing Finance Corporation Contact: Rebekah Luhrs 4300 Boniface Parkway Anchorage, AK rluhrs@ahfc.us Anchorage School District Contact: Calvin Mundt 1301 Labar Street Anchorage, AK mundt_calvin@asdk12.org Fig. 1 Energy Audit Clients This audit was performed using American Recovery and Reinvestment Act (ARRA) funds to promote the use of innovation and technology to solve energy and environmental problems in a way that improves the State of Alaska s economy. This can be achieved through the wiser and more efficient use of energy. The average annual documented utility costs at this 73,856 square foot (sf) facility from January 2009 to December 2010 are as follows: Electricity $129,952 Natural Gas $ 29,539 Total $ January 2009-December 2010 Energy Utilization Index (EUI) = 96.6 kbtu/sf January 2009-December 2010 Energy Cost Index = 2.16 $/sf Fig. 2 Energy Benchmark Data Energy Conservation Measures (ECMs) calculated to be cost effective are shown below in the Executive Summary Table with the energy analyst s best opinion of probable cost, savings, and investment returns. Be aware that the measures are not all additive because of the interrelation of several of the measures. The cost of each measure for this level of auditing is ± 30% until detailed engineering, specifications, and hard proposals are obtained. See section IX for detailed descriptions of all cost effective ECMs. Coffman Engineers, Inc. 6/11/2012 1

7 Table 1 Recommended Energy Conservation Measures Facilities/Maintenance Executive Summary Recommended Energy Conservation Measures (ECMs) Facilities/Maintenance Building (F/M) Rank Feature Recommendation F/M-0 a Refrigerators Replace Refrigerators older than 5 years old F/M-1 b Boiler Shutdown Shutdown boilers during summer months Annual Energy Savings Installed Cost SIR Payback (years) <10 years $260 $0 NA 0 F/M-2 Ventilation Turn off constantly running AHUs during unoccupied times. F/M-3 F/M-4 F/M-5 F/M-6 F/M-7 F/M-8 F/M-9 Lighting: Office Lighting and Controls Setback Thermostat: Office Space Lighting: Maintenance Shops Lighting Setback Thermostat: Shop Area Lighting: Corridor Lighting: Exterior Lighting HVAC And DHW Replace with 12 FLUOR T8 4' F32T8 32W Electronic Ballast and Add 42 new Occupancy Sensors Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Office Space. Replace with 7 FLUOR T5 45.2" F54W/T5 HO Standard StdElectronic. Replace with 6 FLUOR T8 4' F32T8 32W Electronic Ballast. Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Shop Area space. Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic Replace with 25 LED 80W Module StdElectronic. Replace with 15 LED 400W Module StdElectronic Install exhaust stack economizer on both boilers. $4,898 $2, $1,077 $ $2,553 $2, $948 $1, $667 $2, $36 $ $2,102 $17, $1,868 $20, Coffman Engineers, Inc. 6/11/2012 2

8 Executive Summary Recommended Energy Conservation Measures (ECMs) Facilities/Maintenance Building (F/M) Rank Feature Recommendation F/M-10 F/M-11 Exterior Door: Main Building - Double Door Garage Door: Main Building - Wood Overhead Door Remove existing door and install standard prehung U-0.16 insulated door, including hardware. Replace existing garage door with R-7, 2" polyurethane core replacement door. Annual Energy Savings Installed Cost SIR Payback (years) $181 $2, $88 $1, F/M-12 b HVAC New EC Pumps for P-1, 2, 3, 4, 5, and 6 F/M-13 Air Tightening Perform air sealing to reduce air leakage by 30%. F/M-14 Lighting: Utility Improve Manual Switching $803 $9,260 c $1,385 $10, $12 $ Note: a Due to advances in refrigerators in the last 5 years, new Energy Star refrigerators are significantly more efficient than previous models. Replacing existing refrigerators, which are older than 5 years, with new energy star models will typically have paybacks of less than 10 years. b ECM item was modeled with a separate AkWarm model and as a result the item is not an additive measure. It is therefore not included in the final cost savings total in the final AkWarm model in the Appendix D. c The repair cost shown ignores labor and standard replacement costs. The repair cost is the marginal cost of making an energy-efficiency repair rather than a standard repair. See the complete ECM description in Section IX. Coffman Engineers, Inc. 6/11/2012 3

9 Portable Building ECMs All ECMs shown in the Portable Building Executive Summary, below, are based on an AkWarm model for one portable building. Eight portables exist at the site. Multiply the annual energy savings and installed costs by eight to account for all eight portables. Table 2 Recommended Energy Conservation Measures Portable Building Executive Summary Recommended Energy Conservation Measures (ECMs) Portable Building (PB) Rank Feature Recommendation PB-1 Setback Thermostat: Portable Building Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Portable Building space. Annual Energy Savings Installed Cost SIR Payback (years) $258 $1, PB-2 Exterior Door: Portable Building - Doors Remove existing door and install standard prehung U-0.16 insulated door, including hardware. $84 $ PB-3 Cathedral Ceiling: Portable Building - Hot Roof Add R-19 to existing insulation. $159 $2, PB-4 Air Tightening Perform air sealing to reduce air leakage by 30%. $93 $ Coffman Engineers, Inc. 6/11/2012 4

10 II. Introduction This energy audit was conducted for the Anchorage School District (ASD) Facilities/Maintenance Building (F/M). The F/M facility complex is 73,856 sf which includes 63,100 sf for the main building and 10,756 sf for the eight portable buildings connected to the building s electrical service The energy audit was conducted in order to evaluate areas and equipment where utility savings relative to a baseline can be realized with reasonable project financial ratios and payback. Fig. 3 Anchorage, Alaska Google Maps Fig. 4 ASD Facilities/Maintenance Building and Portables Google Maps Coffman Engineers, Inc. 6/11/2012 5

11 III. Energy Audit Process Prior to visiting the school, the first task was to collect and review two years of utility data for electricity and natural gas usage. This information was used to analyze operational characteristics, calculate energy benchmarks for comparison to industry averages, estimate savings potential and establish a baseline to monitor the effectiveness of implemented measures. A spreadsheet was used to enter, sum, and calculate benchmarks and to graph energy use information (see Appendix A). The primary benchmark calculation used for comparison and baseline data is the Energy Utilization Index, or EUI (see Section VII). After gathering the utility data and calculating the EUI, the next step in the audit process was to review the architectural and engineering drawings to develop a building profile which documented building age, type, usage, and major energy consuming equipment or systems such as lighting, Heating, Ventilating, and Air Conditioning, (HVAC), water heating, refrigeration, snow-melt, and etc. The building profile is utilized to generate, and answer, possible questions regarding the facility s energy usage. These questions were then compared to the energy usage profiles developed during the utility data gathering step. After this information is gathered, the next step in the process was the physical site investigation (site visit). The site visit was completed on July 20, 2011 with a follow-up visit in August 30, 2011, and was spent inspecting the actual systems and answering specific questions from the preliminary review. The on-site contact during the investigation was Mr. Bob Holben a of the Anchorage School District Facilities Department. Occupancy schedules, O&M practices, building energy management program, and other information that has an impact on energy consumption were obtained. After the site visit, the energy audit includes an evaluation of the information gathered, researching possible conservation opportunities, organizing the audit into a comprehensive report, and making ECM recommendations for mechanical, electrical, and building envelope improvements. a Mr. Bob Holben, (907) (mobile), (907) (office) Coffman Engineers, Inc. 6/11/2012 6

12 IV. Method of Analysis Having completed the preliminary audit tasks noted in Section III, Coffman Engineers, Inc. (CEI) conducted a site survey. The site survey provides critical input in deciphering where energy opportunities exist within the facility. The audit team walked the entire site to inventory and investigate the building envelope and major equipment, including: HVAC, water heating, lighting, and equipment located in shops, kitchens, offices, and classrooms. An understanding of how the major equipment is used is determined during the audit. The collected data was entered into the AkWarm Commercial software, an energy calculating program for buildings. The data was processed by AkWarm to model a baseline from which ECMs could be considered. The model was compared to actual utility costs to ensure the quality of baseline and proposed energy modeling performed by AkWarm. The recommended ECMs focus on building envelope, HVAC, lighting, water heating, and other electrical measures that will reduce annual energy consumption. ECMs are evaluated based on building use and processes, local climate conditions, building construction type, function, operational schedule, existing conditions, and foreseen future plans. When new equipment is proposed, energy consumption is calculated based on the manufacturer s cataloged information. Energy savings are calculated by AkWarm. Implementation of more than one ECM often affects the savings of other ECMs. The savings may in some cases be relatively higher for an ECM implemented individually than when that ECM is just one of multiple recommended ECMs. For example, implementing reduced operating schedules of inefficient lighting systems may result in a given savings. Also implementing a more efficient lighting system will add to the savings, but less than the efficient lighting would alone because there is less energy to be saved when the lights are on a reduced operating schedule. Thus, if multiple ECM s are recommended, the combined savings must be calculated and identified appropriately in groups. In Appendix D, Energy Conservation Measures, the simple lifetime calculation is shown for each ECM, which is based on the typical life of the equipment being replaced or altered. The energy savings are extrapolated throughout the lifetime of the ECM. The total energy savings is calculated as the total lifetime multiplied by the yearly savings. The cost savings and installation costs are used to calculate simple payback b and the Savings to Investment Ratio c (SIR).These are listed in Appendix D and summarized in the Executive Summary Table of this report. The SIR is calculated as a ratio by dividing the break even cost by the initial installed cost. Cost savings is calculated based on the historical energy costs for the building. Installation costs include labor and equipment to evaluate the initial investment required to implement an ECM. These are applied to each recommendation with simple paybacks calculated. The energy analyst s opinions of probable cost are garnered from RS Means Cost Data, other industry publications, and local contractors and suppliers. In addition, where applicable, maintenance cost savings are estimated and applied to the net savings. b The simple payback is based on the years that it takes for the net savings to payback the net installation cost (Cost divided by Savings). c Savings to Investment Ratio (SIR): Break Even Cost divided by initial installed cost, where Break-Even Cost is how much can be spent and still have the measure be cost effective; it equals the Present Value (PV) of Savings over the life of the measure minus PV of maintenance costs. Coffman Engineers, Inc. 6/11/2012 7

13 V. Facilities/Maintenance Building Description The ASD F/M Building is a large two-story office, shop and warehouse building with eight portable buildings and three rows of electrical outlets for vehicle heaters arranged on structures called bull rails. The F/M Building was originally constructed in 1976 as a large commercial brewery with process piping, tanks and other equipment. The building was sold to the ASD and was remodeled to serve office, shop and warehousing needs of the Facilities/Maintenance department. The office space is regularly occupied by 30 people from 7am to 5pm every day from Monday to Friday. The shop and warehouse space is occupied by 30 people from 7am to 5pm. There is also a night shift that uses the shop and warehouse space as well. The eight separate portable structures are used for heated storage and are occupied for a limited amount of time, typically only when equipment is taken in or out of the portable. One portable is used for office space. For modeling purposes we assumed that the portables are occupied an average of 15 hours per week. V.I Facilities/Maintenance Architectural Description The majority of the F/M Building walls are constructed with pre-cast concrete panels. Based on the original architectural drawings the concrete panel wall is made up of two 4 thick concrete panels that sandwich 3 thick expanded polystyrene (EPS) insulation, for a total wall thickness of 11. The total effective R-value of this pre-cast concrete panel system is R A second wall type exists for the high walls of the glass shop area, on the south side of the Facilities/ Maintenance Building. This wall type is constructed with metal frame walls with 4 thick structurally insulated panels, according to architectural drawings. There is an additional layer of 2 spray foam with fireproof coating on the interior side of the wall panel. The effective insulation value of the metal frame wall system is R There is a total of 27,025 sf of total wall area. Floor construction for the building is concrete slab-on-grade. The perimeter of the slab has 2 of EPS rigid edge insulation (R-8) that extends to four feet below grade. There is 40,505 sf of slab-on-grade floor area. There is a total of 63,100 sf of floor area within the building including second story fan rooms, mechanical rooms, and second story office spaces. The roof construction of the building is an EPDM roofing membrane covering rigid insulation on top of decking. According to the original architectural drawings the rigid insulation of the roof is 3.75 thick. The roof insulation could not be accessed; however it was estimated to be EPS rigid insulation, making the roof system R There is 40,505 sf of roofing on the office building. There are several windows types in the building. Most of the windows are ½ air space, double pane/metal frame windows. However, single-pane/metal frame windows and double-pane/vinyl frame windows were also found. The building has several types of exterior man doors and overhead garage doors. The man doors are older style insulated metal doors, estimated at R-1.7. Two of the man doors appear to be hollow metal doors with no interior insulation (estimated to be R-1). There are two types of overhead garage doors; the first is an insulated metal panel door (R-6.3) and the second is an older solid core wood panel door (R-1.8). V.II Facilities/Maintenance Mechanical Description The building is heated with two dual fuel gas-oil boilers and three gas fired unit heaters. The two dual fuel Weil-McLain boilers deliver heat to perimeter hydronic baseboards, small unit heaters and hydronic coils in air handling units (AHUs). The two identical boilers are both model 1178 with 1,527,000 Btu/h input rating. The boilers typically run on natural gas, but also have onsite heating oil storage with day tanks in Coffman Engineers, Inc. 6/11/2012 8

14 order to utilize heating oil during an emergency. The boilers are estimated to be 20 years old and appear to be well maintained. A major mechanical upgrade using the existing boilers was completed in The boiler system is controlled by a Siemens APOGEE Direct Digital Control (DDC) system. There are five AHUs in the building that provide heated air to the office, shop and warehouse spaces. Four of the AHUs utilize hydronic heating coils heated from the boiler loop. These AHUs utilize older pneumatic controls that are tied into the DDC system. The remaining AHU is gas fired and provides heat to the wood shop area. The domestic hot water for the building is supplied by an 85 gallon standard gas fired updraft hot water heater. The hot water heater is manufactured by State and has an input rating of 500,000 Btu/hr. The domestic hot water consumption of the building was estimated to be 40 gallons per day, based on typical office usage patterns developed by ASHRAE. V.IIV Facilities/Maintenance Electrical Description The Facilities and Maintenance building is served by a 1200 Amp (A), 480 Volt (V), 3-phase, 4-wire, underground electrical service by the Chugach Electric Association. The building has a standby generator to serve critical loads in the event of a utility power outage. Inside the school, 277/480V power is used to serve large mechanical loads, lighting, and several step-down dry-type transformers. The transformers convert the voltage to 120/208V, three phase for receptacle loads, and computers. Since the passage of the Energy Policy Act of 2005, all general purpose transformers have been required to meet the efficiency requirements listed in the National Electrical Manufacturer's Association publication NEMA TP There may be energy savings available by replacing these transformers with new models that meet or exceed the standard, however caution must be exercised because replacing transformers impacts available fault current and over-current protection device selective coordination. The replacement of these transformers could only be recommended after performing a power system analysis. That level of study is outside the scope of this project. Most office fluorescent light fixtures have been upgraded with T8 lamps and programmable start electronic ballasts, which are compatible with occupancy sensors. Only a few T12 light fixtures remain. In the workshop areas lighting is provided by a mixture of fluorescent T5HO, T8, and T12 light fixtures as well as metal halide high bay light fixtures. Nightlights (un-switched light fixtures) are present throughout the building in enough excess that the occupants of many of the corridors and offices do not switch on the other light fixtures. The ASD support facility campus parking lots are illuminated by several 750W pole mounted high pressure sodium light (HPS) fixtures powered from the F&M building. The exterior of the building is also illuminated by several 150W HPS wall pack light fixtures. All of these exterior light fixtures are controlled by an on/off photo switch to turn the fixtures off during the day. Coffman Engineers, Inc. 6/11/2012 9

15 VI. Portable Buildings Description VI.I Portables Architectural Description The eight onsite portables have 2x4 wood stud wall construction at 16 on-center with R-11 fiberglass batt insulation in between the studs. The exterior face of the wall is T1-11 siding with drywall on the interior side of the wall. Interior and exterior wall height is nine feet under the roof eaves, and the endwalls vary in height from nine feet at the eaves to 11 feet at the roof peak in the center of the end wall. One portable typically has 1,170 sq ft of exterior wall area. The portables have above grade floors resting on sleepers. Plywood skirting protects the sleepers and floor construction from weather. The floor construction is plywood flooring resting on 2x8 wood joists. It is estimated that the floor has R-19 fiberglass batt insulation. One portable typically has 1,000 sq ft of floor area. The portables are all covered by hot roofs, with shingles covering plywood decking. It is estimated that the roof insulation is R-19 fiberglass batt insulation. One portable typically has 1,000 sq ft of roof area. The windows of the portables include both single pane and double pane wood windows. There are typically two metal doors per portable, with estimated insulation values of R-1.7. Table 3 Portable List Name Usage Name Usage Portable 1 Office Portable 5 Storage Portable 2 Office Portable 6 Storage Portable 3 Shop Portable 7 Storage Portable 4 Storage Portable 8 Storage Note: Portable numbers were created for this audit and may not represent the actual number used by ASD. VI.II Portables Mechanical Description All eight portables are heated with electric resistance perimeter baseboards and electric unit heaters. The electric baseboard temperature set point is controlled by a dial thermostat on each individual baseboard. This makes it easy for the electric baseboards to be left on at higher temperatures than is required. Due to the need to keep these buildings moveable and due to combustion safety issues, the ASD states its desire to keep all portable buildings on electric heat and not utilize natural gas heating at this time. VI.III Portables Electrical Description The lighting in the eight portables is typically 2 lamp, 4ft long, T-12 light fixtures with magnetic ballasts. Due to the low operational use of the portables and low run time of the lights (15 hrs/week) retrofitting the T-12 light fixtures with T-8 lamps is not cost effective, at this time. In the future, this lighting retrofit will be cost effective if the portable lighting is utilized more hours during the week. VI.IV Portables Modeling Description Due to the fact that the eight on-site portables have similar building envelope construction and heating equipment, only one AkWarm model was created to model one portable building. The standardized model was created using 1,000 sf per unit. The results and recommended ECMs generated by this single portable AkWarm model should be extrapolated and applied to all of the eight portable buildings. On this facility, the total portable unit floor area measured 10,756 sf. The energy and space usage was taken into consideration when modeling the portable units and has been included within this report. Coffman Engineers, Inc. 6/11/

16 VII. Historic Energy Consumption and Cost Tables provided in Appendix A, Energy Benchmark Data Report, represent the electric and natural gas energy usage for the surveyed facility from January 2009 to December Chugach Electric provides the electricity and ENSTAR provides the natural gas to the facility. Both utilities bill under their commercial rate schedules. VII.I Electrical Consumption Data The electric utility costs consist of several components: a fixed monthly customer charge, an energy usage charge, fuel surcharge, taxes, and a demand charge. The energy usage and fuel surcharge are based on the customer's usage as measured in kilowatt-hours (kwh). The usage (kwh) is determined by load wattage divided by 1,000, times hours running. For example; a 1,000 watt space heater operating for one hour will use 1 kwh of electricity as would ten, 100 watt lamps operating for one hour or one, 100W lamp operating for 10 hours. One kwh is equivalent to 3,413 BTU. VII.II Natural Gas Consumption Data The natural gas supplier bills for consumption in CCF of natural gas; where one CCF equals 100 cubic feet of natural gas. The average heating value of natural gas is 1,000 BTUs per cubic foot, making 1 CCF equal to 100,000 BTUs (also called one Therm ). VII.III Overall Energy Consumption Data The average billing rates for energy use are calculated by dividing the total cost by the total usage. Based on the electric and natural gas utility data provided, the 2009 and 2010 costs for the energy and consumption at the surveyed facility are summarized in the table below. Table 4 Energy Cost and Consumption Data Energy Cost and Consumption Data Average Electric Rate $0.12 /kwh $0.10 /kwh $0.11 /kwh Natural Gas Rate $1.02 /CCF $0.91 /CCF $0.95 /CCF Total Cost $180,517 $139,385 $159,391 ECI $2.44 /sf $1.89 /sf $2.16 /sf Electric EUI 56.7 kbtu/sf 52.2 kbtu/sf 54.4 kbtu/sf Natural Gas EUI 42.0 kbtu/sf 42.2 kbtu/sf 42.1 kbtu/sf Building EUI 98.8 kbtu/sf 94.4 kbtu/sf 96.6 kbtu/sf The Energy Cost Index (ECI) is derived by dividing the annual cost by the building square footage. The building square footage of the main building and portables was calculated to be 73,856 sf. This area includes 63,100 sf for the main building and 10,756 sf for the eight portable buildings. The annual EUI is expressed in Thousands of British Thermal Units per Square Foot (kbtu/sf) and can be used to compare energy consumption of similar building types or to track consumption from year to year in the same building. The EUI is calculated by converting annual consumption of all fuels used to Btu s and then dividing by the area (gross conditioned square footage) of the building. EUI is a good indicator of the relative potential for energy savings. A comparatively low EUI indicates less potential for large energy savings. Building architectural, mechanical, and electrical drawings were obtained and utilized to Coffman Engineers, Inc. 6/11/

17 calculate and verify the gross area of the facility. The gross area was confirmed on the physical site investigation. Coffman Engineers, Inc. 6/11/

18 VIII. Equipment Inventory and Photo Survey Following the completion of the field survey a detailed equipment list was created and is attached as Appendix C. The major equipment listed are considered to be the major energy consuming equipment in the building whose replacement could yield substantial energy savings. An approximate age was assigned to the equipment if a manufactured date was not shown on the equipment s nameplate. As listed in the 2011 ASHRAE Handbook for HVAC Applications, Chapter 37, Table 4, the service life for the equipment along with the remaining useful life in accordance to the ASHRAE standard are also noted in the equipment list. Where there are zero (0) years remaining in the estimated useful life of a piece of equipment, this is an indication that maintenance costs are likely on the rise and more efficient replacement equipment is available which will lower the operating costs of the unit. Maintenance costs should also fall with the replacement. Photos of various equipment and the building construction were taken during the site visit. Several photos detailing the equipment and building are included in Appendix E. CEI made miscellaneous thermographic images of the building using a FLIR T300 Infrared Camera. This is not a thermographic study, but rather just a few snapshots to illustrate easy-to-identify heat losses. These thermographic photos are included in Appendix F. Coffman Engineers, Inc. 6/11/

19 IX. Energy Conservation Measures The following ECMs described here have been calculated by AkWarm Commercial and considered by the energy audit team as viable projects. ECMs provided below are considered to have viable financial ratios (SIR>1) or to add value to the building or building operational profiles. For a full list of ECMs considered and calculated by the energy audit team, including ECMs not recommended at this time, please see Appendix D. IX.I Facilities/Maintenance Building ECM #FM-0 Replace Refrigerators Older than 5 years Old Annual Energy Savings Installed Cost SIR Payback (years) <10 years Due to recent advances in refrigerators in the last 5 years, new Energy Star refrigerators are significantly more efficient than previous models. Replacing existing refrigerators, which are older than 5 years old, with new energy star models will typically have paybacks of less than 10 years. ECM #FM-1 Shutdown Boilers During Summer Months Annual Energy Savings Installed Cost SIR Payback (years) $260 $0-0 The two dual fuel, gas-oil, boilers in the building operate year-round, even during the summer when limited heating needs are required. By turning off the boilers from June to the end of August, energy savings can be achieved. ASD has had trouble with older generation grooved joint couplings when subjected to cyclic heating and cooling from seasonal shutdowns. However, due to the fact that the hydronic piping in the F/M building does not contain grooved-joint couplings, leaks should not be an issue when boilers are shut down seasonally. Since there is no installed cost, the payback is immediate, and the SIR is large enough that it can be described as infinite. This ECM was modeled with a separate AkWarm model and as a result the item is not an additive measure in AkWarm. It is therefore not included in the final cost savings total in the final AkWarm model in the Appendix D. ECM #FM-2 Reduce AHU Operation Annual Energy Savings Installed Cost SIR Payback (years) $4,898 $2, There are four existing air handling units (AHUs) that operate continuously in the Facilities/ Maintenance Building: AHUs-2, 3, 4 and 5. (See Appendix C Major Equipment List) Significant energy savings exist by stopping the fan motors of these AHUs during unoccupied times with a timer control. By shutting down the AHUs during unoccupied times, the amount of cold outside air that needs to be heated by the heating system is reduced. This in turn reduces the amount of natural gas being used by the boiler. The electrical consumption of the fan motors would also be reduced. A manual override should also be installed to allow the AHUs to be turned on in the event that people occupy the building during typically unoccupied times. See measure 1 in appendix D for more details of this measure. Coffman Engineers, Inc. 6/11/

20 ECM #FM-3 Upgrade the Lighting and Control systems in the Offices Annual Energy Savings Installed Cost SIR Payback (years) $2,840 $8, Upgrading the lighting and control systems in the office spaces in the Facilities/Maintenance building would include retrofitting a few U-Tube T12 light fixtures with magnetic ballasts with T8 lamps and program start electronic ballasts. Additionally, every office space would be provided an occupancy sensor for control. This would be a simple retrofit since most of the office spaces are illuminated via T8 fluorescent light fixtures with program start electronic ballasts that are compatible with occupancy sensors. There are approximately 12 U-tube light fixtures that require upgrading and approximately 42 occupancy sensors that would be installed in the office spaces. This description is for a compilation of several ECM's that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See measures 2, 5, 6, 7, 9, 11 and 20 in appendix D for details of individual measures. ECM #FM-4 Setback Thermostat for Office Space Annual Energy Savings Installed Cost SIR Payback (years) $2,553 $2, Significant energy savings exist by reducing the room temperature of the office space during unoccupied times. In order to utilize a setback thermostat, the hydronic baseboards in the mezzanine area will need automatic thermostat control, as they can only be manually controlled at this time. During the site visit, it was noted that the mezzanine baseboards were delivering heat even though it was a hot day and the room was overheating. The roof top air conditioning units were simultaneously cooling the space, to compensate for the manually set baseboards. If these baseboards can be thermostatically controlled, then further savings can be achieved because the air conditioner units will not be required to run as much. Adding thermostat controls to the mezzanine baseboards and reducing the temperature of all office spaces to 60F during unoccupied times will save approximately $2,553 annually, with an estimated installed cost of $2,000. See measure 3 in appendix D for more details of this measure. ECM #FM-5 Upgrade the Lighting in the Maintenance Shops Annual Energy Savings Installed Cost SIR Payback (years) $1,135 $2, Upgrading the lighting maintenance shops in the Facilities/Maintenance building would include replacing several 400W metal halide light fixtures with fluorescent T5HO light fixtures in the paint shop and the vehicle maintenance shops, and replace the several T12 fluorescent light fixtures with magnetic ballasts with T8 lamps and program start electronic ballasts in room 40A. There are approximately seven metal halide, and six fluorescent light fixtures that require upgrading. This description is for a compilation of several ECM's that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See measures 5, 10 and 12 in appendix D for details of individual measures. Coffman Engineers, Inc. 6/11/

21 ECM #FM-6 Setback Thermostat for Office Space Annual Energy Savings Installed Cost SIR Payback (years) $667 $2, Significant energy savings exist by reducing the room temperature of the shop spaces during unoccupied times. Reducing the temperature of all office spaces to 60F during unoccupied times will save approximately $667 annually, with an estimated installed cost of $2,000. See measure 8 in appendix D for more details of this measure. ECM #FM-7 Replace the Existing Two Lamp T12 Light Fixtures with T8 Light Fixtures in Stairways SW2 and SW10 Annual Energy Savings Installed Cost SIR Payback (years) $36 $ The corridors and stairways in the ASD F&M building were originally illuminated by T12 light fixtures with magnetic ballasts. Most of these light fixtures have been upgraded with T8 lamps and programmable start ballasts. However, two of the existing fixtures have not yet been upgraded, specifically in stairways SW2 and SW10 and they should be upgraded with drop in retrofit kits. See measure 13 in appendix D for more details of this measure. ECM #FM-8 Upgrade the Exterior Lighting Annual Energy Savings Installed Cost SIR Payback (years) $5,280 $55, The exterior of the ASD F&M building is illuminated by approximately (25) 150W HPS wall pack light fixtures and (15) 750W HPS pole mounted light fixtures. These light fixtures are controlled by a photocell to turn the fixtures off during the day. Replacing these existing HPS light fixtures with LED fixtures would provide a significant energy savings and may also increase the safety of the parking area because of better color rendering qualities offered by LED sources. Another potential economic benefit that is not modeled here is the reduction in maintenance costs resulting from increased lamp life. This description is for a compilation of several ECM's that are intended to be implemented at the same time, however due to constraints with the AkWarm modeling software the different lighting configurations were modeled separately. See measures 14 and 18 in appendix D for details of individual measures. ECM #FM-9 Install Exhaust Stack Economizer Annual Energy Savings Installed Cost SIR Payback (years) $1,868 $20, Installing one exhaust stack economizer on the combined exhaust stack of the two existing dual fuel, gasoil, boilers will recover heat from exhaust gases. An exhaust stack economizer utilizes a fan and heat exchanger to transfer heat from exhaust gases to the hydronic system, increasing the efficiency of the heating system by approximately 5% or more. Exhaust stack economizers can only be used when burning natural gas or propane at this time. For use with the dual fuel gas-oil boilers, the economizers must be installed with a by-pass stack and diverting damper to ensure that exhaust from burning heating oil do not travel through the exhaust stack economizer heat exchanger. This ECM will cost approximately $20,000 with an annual savings of $1,868. See measure 15 in appendix D for more details of this measure. Coffman Engineers, Inc. 6/11/

22 ECM #FM-10 Replace Two Double Doors Annual Energy Savings Installed Cost SIR Payback (years) $181 $2, There are two 90 x 120 hollow metal exterior doors that do not have any insulation inside of them (R- 1). It is recommended that both doors be removed and replaced with new R-6.25 minimum (U-0.16) insulated doors. This ECM will save approximately $181 per year with installed cost of $2,928. See measure 16 in appendix D for more details of this measure. ECM #FM-11 Replace Wood Overhead Garage Doors Annual Energy Savings Installed Cost SIR Payback (years) $88 $1, There are two 8-6 x 7-6 hollow wood overhead garage doors in the vehicle maintenance shop that are un-insulated (R-1.8). It is recommended that both doors be removed and replaced with new R-7 minimum, 2 polyurethane core garage doors. This ECM will save approximately $88 per year with installed cost of $1,492. See measure 17 in appendix D for more details of this measure. ECM #FM-12 - New EC Pumps for P-1, 2, 3, 4, 5, and 6 Annual Energy Savings Installed Cost SIR Payback (years) $803 $9, The eight existing circulation pumps (P-1, 2, 3, 4, 5, and 6) are constant speed pumps. New, highefficiency pumps with electronically commutated (EC) motors have integral speed controls which read system demand, allowing the pump to slow down with significant electrical savings. Replacing the existing pumps with new pumps with EC motors now (while the existing motors are still functional) will result in a $17,380 replacement cost with an annual energy savings of $634, and a simple payback of 27 years. However, upgrading to pumps with EC motors when the existing pumps fail and are in need of repair will offer a much better payback because the marginal cost of the high efficiency EC motor over the standard replacement is only a $9,260 repair cost. This repair cost offers a simple payback of 11.5 yrs, resulting in an SIR of The repair upgrade is recommended as it is the most cost effective option. This ECM was modeled with a separate AkWarm model and as a result the item is not an additive measure in AkWarm. It is therefore not included in the final cost savings total in the final AkWarm model in the Appendix D. Coffman Engineers, Inc. 6/11/

23 ECM #FM-13 Air Tightening Annual Energy Savings Installed Cost SIR Payback (years) $1,385 $10, By tightening the building envelope with air sealing improvements, infiltration into the building will be reduced. This in turn will reduce the heating load required by the building and reduce the amount of natural gas being burned by the boilers. While a blower door test was not completed, it is anticipated that air leakage is occurring though old weather stripping around doors, window frames, and wall and roof penetrations. Leakage is also expected to be occurring through old decommissioned AHUs near the MCR area and through ceiling outdoor air intake dampers in the shop areas. Methods to decrease the infiltration into the building include: sealing around the windows and doors with caulking and insulation, adding new weather stripping to doors, providing gaskets to all exterior cover plates and sealing all roof and wall penetrations. Also, seal the outdoor air ducts of the old decommissioned AHUs and replace dampers as needed. See measure 19 in appendix D for more details of this measure. ECM #FM-14 - Remove High Bay Light Fixture in Utility Room 116 Annual Energy Savings Installed Cost SIR Payback (years) $12 $ In utility room 116 there is an existing 400W Metal Halide high bay fixture that is not needed, due to the fact that adequate light levels are provided by other existing lights in the room. Removing this 400W light fixture will reduce electricity consumption. See measure 21 in appendix D for more details of this measure. Coffman Engineers, Inc. 6/11/

24 IX.II Portable Buildings There are eight portable buildings that exist on-site and are connected to the electrical service of the main Facilities/ Maintenance Building. A typical AkWarm model was created to model the typical portable, due to similarities in construction type and heating systems. The following ECM savings and installed costs are for one portable building. Multiply the results by eight to obtain savings and costs for all eight portables combined. ECM #PB-1 Setback Thermostat Annual Energy Savings Installed Cost SIR Payback (years) $258 $1, Significant energy savings exist by reducing the room temperature of the portable buildings during unoccupied times. However, due to the fact that each portable building has many perimeter electric baseboard heaters, each with individual dial thermostats, it is difficult to obtain a desired set point in the portable building. As a result, the temperatures in the portables are typically much higher than required, 65F or warmer. Also, temperatures cannot be set back during unoccupied times. It is recommended that a central programmable thermostat be installed in the portable building that can turn on or off the perimeter electric baseboards to control occupied and unoccupied temperature set points. Reducing the portable temperature from 65F to 60F during unoccupied times, for portables used as office space, will save $258 annually in electricity bills. Further savings can be had for portables used for warm storage, where indoor temperatures of 40F are sufficient warm storage temperatures. Reducing the portable temperature from 65F to 40F for warm storage portables will save approximately $1,400 annually in electricity bills. ECM #PB-2 Replace Exterior Doors Annual Energy Savings Installed Cost SIR Payback (years) $84 $ The portable buildings each have two poorly insulated (R-1.7) metal doors. It is recommended that both doors be removed and replaced with new R-6.25 minimum (U-0.16) insulated doors. The new doors should have proper weather stripping on them to reduce air infiltration. ECM #PB-3 Add Roof Insulation Annual Energy Savings Installed Cost SIR Payback (years) $159 $2, Adding additional R-19 fiberglass batt insulation to the roof of the portables to make an R-38 roof may be feasible during the next scheduled roof replacement. Installing an additional layer of R-19 insulation will save approximately $159 per year per portable, with an installed cost of $2,520 if completed in combination with the roof replacement. This ECM will give a SIR of 130 and a simple payback of 15.9 years. Coffman Engineers, Inc. 6/11/

25 ECM #PB-4 Seal Building Envelope and Reduce Infiltration by 20% Annual Energy Savings Installed Cost SIR Payback (years) $93 $ By tightening the building envelope with air sealing improvements, infiltration into the building will be reduced. This in turn will reduce the heating load required by the building and reduce the amount of electricity being used by the electric heaters. Reducing infiltration by air sealing the building envelope will produce energy savings. While a blower door test was not completed, it is anticipated that air leakage is occurring around old weather stripping around doors, window frames, and wall and roof penetrations. Methods to decrease the infiltration into the building include: sealing around the windows and doors with caulking and insulation, adding new weather stripping to doors, providing gaskets to all exterior cover plates and sealing all roof and wall penetrations. Reducing infiltration by 20% with air sealing improvements will save approximately $62 per year per portable and will have an installation cost of approximately $700. Coffman Engineers, Inc. 6/11/

26 IX.III Administrative Controls for Energy Conservation and Optimization While the intent of many energy conservation measures is to increase the efficiency of fuel-burning and electrical equipment, an important factor of energy consumption lies in the operational profiles which control the equipment usage. Such profiles can be managed by administrative controls and departmental leadership. They determine how and when fuel-burning and electrical equipment are used, and therefore have a greater impact on energy savings potential than simply equipment upgrades alone. Significant energy cost savings can be realized when ECMs are combined with efficient-minded operational profiles. Operational profiles may be outlined by organization policy or developed naturally or historically. These profiles include, but are not limited to: operating schedules, equipment setpoints and control strategies, maintenance schedules, and site and equipment selection. Optimization of operational profiles can be accomplished by numerous methods so long as the intent is reduction in energy-using equipment runtime. Due to the numerous methods of optimization, energy cost savings solely as a result of operational optimization are difficult to predict. Quantification, however, is easy to accomplish by metering energy usage during and/or after implementation of energy-saving operational profiles and ECMs. Shown below are some examples which have proven successful for other organizations. Optimization of site selection includes scheduling and location of events. If several buildings in a given neighborhood are all lightly used after regularly occupied hours, energy savings can be found when afterhours events are consolidated and held within the most energy efficient buildings available for use. As a result, unoccupied buildings could be shut down to the greatest extent possible to reduce energy consumption. Two operational behaviors which can be combined with equipment upgrades are operating schedules and equipment control strategies including setpoints. Occupancy and daylight sensors can be programmed to automatically shut off or dim lighting when rooms are unoccupied or sufficiently lit from the sun. Operating schedules can be optimized to run equipment only during regular or high-occupancy periods. Also, through a central control system, or with digital programmable thermostats, temperature setpoints can be reduced during low-occupancy hours to maximize savings. In addition, sporadically used equipment can be shut down during unoccupied hours to further save energy. In general, having equipment operating in areas where no occupants are present is inefficient, and presents an opportunity for energy savings. Operational profiles can also be implemented to take advantage of no- or low-cost ECMs. Examples include heating plant optimizations (boiler section cleaning, boiler flush-through cleaning) and tighter controls of equipment setbacks and shutdowns (unoccupied zones equipment shutdown, easier access to and finer control of equipment for after-hours control). In a large facility management program, implementation of these measures across many or all sites will realize dramatic savings due to the quantity of equipment involved. Changes to building operational profiles can only be realized while simultaneously addressing health, safety, user comfort, and user requirements first. It is impractical to expect users to occupy a building or implement operational behaviors which do not meet such considerations. That said, it is quite practical for management groups to implement administrative controls which reduce losses brought about by excess and sub-optimum usage. Coffman Engineers, Inc. 6/11/

27 Appendix A Energy Benchmark Data Coffman Engineers, Inc. 6/11/2012

28 Draft Facility Owner MOA Community Population 261,500 Facility Address Facility City Facility Zip 1301 Labar St Anchorage Contact Person First Name Last Name Middle Name Phone Chris Lynch Mailing Address 1301 Labar Street REAL Preliminary Benchmark Data Form PART I FACILITY INFORMATION Facility Owned By Date Municipal Government/Subdivision 03/14/11 Building Name/ Identifier Building Usage Building Square Footage ASD Facility Maintenance Other 73,856 Building Type Mixed City Anchorage Year Built 1976 State Zip AK Primary Operating Hours Average # of Occupants During Monday-Friday Saturday Sunday Holidays 08:00-5:00 Renovations Date Details Main Building = SF Outbuildings = SF Total = SF PART II ENERGY SOURCES 1. Please check every energy source you use in the table below. If known, please enter the base rate you pay for the energy source. 2. Provide utilities bills for the most recent two-year period for each energy source you use. Heating Oil Electricity Natural Gas Propane Wood Coal $ /gallon $ / kwh $ / CCF $ / gal $ / cord $ / ton Other energy sources? Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

29 Draft ASD Facility Maintenance Buiding Size Input (sf) = 73, Natural Gas Consumption (Therms) 31, Natural Gas Cost ($) 31, Electric Consumption (kwh) 1,227, Electric Cost ($) 149, Total Energy Use (kbtu) 7,294, Total Energy Cost ($) 180,517 Annual Energy Use Intensity (EUI) 2009 Natural Gas (kbtu/sf) Electricity (kbtu/sf) Energy Utilization Index (kbtu/sf) 98.8 Annual Energy Cost Index (ECI) 2009 Natural Gas Cost Index ($/sf) Electric Cost Index ($/sf) Energy Cost Index ($/sf) Natural Gas Consumption (Therms) 31, Natural Gas Cost ($) 27, Electric Consumption (kwh) 1,128, Electric Cost ($) 111, Total Energy Use (kbtu) 6,970, Total Energy Cost ($) 139,385 Annual Energy Use Intensity (EUI) 2010 Natural Gas (kbtu/sf) Electricity (kbtu/sf) Energy Utilization Index (kbtu/sf) 94.4 Annual Energy Cost Index (ECI) 2010 Natural Gas Cost Index ($/sf) Electric Cost Index ($/sf) Energy Cost Index ($/sf) 1.89 Note: 1 kwh = 3,413 Btu's 1 Therm = 100,000 Btu's 1 CF 1,000 Btu's Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

30 Draft Energy Audit Report Anchorage School District Facilities/Maintenance ASD Facility Maintenance Natural Gas Btus/CCF =100,000 Provider Customer # Month Start Date End Date Billing Days Consumption (CCF) Consumption (Therms) Demand Use Natural Gas Cost ($) Unit Cost ($/Therm) Demand Cost ($) Enstar NGC 560 Jan-09 12/30/08 02/02/ ,745 4,745 $4,814 $1.01 Enstar NGC 560 Feb-09 02/02/09 02/27/ ,437 3,437 $3,514 $1.02 Enstar NGC 560 Mar-09 02/27/09 04/01/ ,280 3,280 $3,347 $1.02 Enstar NGC 560 Apr-09 04/01/09 04/29/ ,278 2,278 $2,351 $1.03 Enstar NGC 560 May-09 04/29/09 06/01/ ,720 1,720 $1,784 $1.04 Enstar NGC 560 Jun-09 06/01/09 06/30/ ,454 1,454 $1,525 $1.05 Enstar NGC 560 Jul-09 06/30/09 07/31/ $535 $1.14 Enstar NGC 560 Aug-09 07/31/09 08/31/ ,475 1,475 $1,544 $1.05 Enstar NGC 560 Sep-09 08/31/09 09/30/ ,910 1,910 $1,980 $1.04 Enstar NGC 560 Oct-09 09/30/09 10/29/ ,526 2,526 $2,602 $1.03 Enstar NGC 560 Nov-09 10/29/09 11/30/ ,827 3,827 $3,898 $1.02 Enstar NGC 560 Dec-09 11/30/09 12/31/ ,934 3,934 $3,319 $0.84 Enstar NGC 560 Jan-10 12/31/09 02/01/ ,313 4,313 $3,630 $0.84 Enstar NGC 560 Feb-10 02/01/10 03/01/ ,020 3,020 $2,562 $0.85 Enstar NGC 560 Mar-10 03/01/10 04/01/ ,327 3,327 $2,845 $0.86 Enstar NGC 560 Apr-10 04/01/10 04/30/ ,060 2,060 $1,790 $0.87 Enstar NGC 560 May-10 04/30/10 05/27/ ,706 1,706 $1,500 $0.88 Enstar NGC 560 Jun-10 05/27/10 06/29/ ,555 1,555 $1,360 $0.87 Enstar NGC 560 Jul-10 06/29/10 07/29/ ,570 1,570 $1,395 $0.89 Enstar NGC 560 Aug-10 07/29/10 08/30/ ,563 1,563 $1,600 $1.02 Enstar NGC 560 Sep-10 08/30/10 10/01/ ,664 1,664 $1,670 $1.00 Enstar NGC 560 Oct-10 10/01/10 10/28/ ,187 2,187 $2,156 $0.99 Enstar NGC 560 Nov-10 10/28/10 11/29/ ,083 3,083 $2,808 $0.91 Enstar NGC 560 Dec-10 11/29/10 12/29/ ,134 5,134 $4,542 $0.88 Jan - 09 to Dec - 09 total: 31,056 31,056 0 $31,213 $0 Jan - 10 to Dec - 10 total: 31,182 31,182 0 $27,858 $0 Jan - 09 to Dec - 09 avg: Jan - 10 to Dec - 10 avg: $1.01 $0.89 Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

31 Draft Energy Audit Report Anchorage School District Facilities/Maintenance ASD Facility Maintenance - Natural Gas Consumption (Therms) vs. Natural Gas Cost ($) 6,000 $6,000 5,000 $5,000 Na atural Gas Consumption (Therms) 4,000 3,000 2,000 $4,000 $3,000 $2,000 Natural Gas Cost ($) Natural Gas Consumption (Therms) Natural Gas Cost ($) 1,000 $1,000 0 $0 Date (Mon -Yr) Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

32 Draft Energy Audit Report Anchorage School District Facilities/Maintenance ASD Facility Maintenance Electricity Btus/kWh =3,413 Provider Customer # Month Start Date End Date Billing Days Consumption (kwh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kwh) Demand Cost ($) CEA Jan-09 12/30/2008 1/30/ ,036 4, $19,632 $0.14 $2, CEA Feb-09 1/30/2009 3/3/ ,130 4, $17,006 $0.14 $2, CEA Mar-09 3/3/2009 4/1/ ,888 4, $16,684 $0.13 $2, CEA Apr-09 4/1/2009 4/30/ ,945 3, $14,250 $0.13 $2, CEA May-09 4/30/2009 6/1/ ,685 2, $10,812 $0.13 $1, CEA Jun-09 6/1/2009 7/1/ ,224 2, $8,194 $0.12 $1, CEA Jul-09 7/1/2009 7/31/ ,531 2, $8,068 $0.12 $1, CEA Aug-09 7/31/2009 8/31/ ,280 2, $8,412 $0.11 $1, CEA Sep-09 8/31/2009 9/30/ ,040 2, $8,877 $0.11 $2, CEA Oct-09 9/30/ /30/ ,250 3, $11,010 $0.11 $2, CEA Nov-09 10/30/ /1/ ,900 4, $13,272 $0.11 $2, CEA Dec-09 12/1/ /30/ ,509 4, $13,087 $0.10 $2, CEA Jan-10 12/30/2009 1/29/ ,496 4, $12,634 $0.10 $2, CEA Feb-10 1/29/2010 3/2/ ,930 3, $10,705 $0.10 $2, CEA Mar-10 3/2/2010 4/1/ ,216 4, $12,260 $0.10 $2, CEA Apr-10 4/1/2010 5/3/ ,929 3, $10,033 $0.10 $2, CEA May-10 5/3/2010 6/2/ ,743 2, $8,295 $0.10 $1, CEA Jun-10 6/2/2010 7/1/ ,999 2, $6,461 $0.10 $1, CEA Jul-10 7/1/2010 8/2/ ,733 2, $6,523 $0.10 $1, CEA Aug ,588 2, $6,632 $0.10 CEA Sep ,683 2, $6,879 $0.10 CEA Oct ,324 3, $8,601 $0.10 CEA Nov ,569 3, $10,319 $0.10 CEA Dec ,611 4, $12,185 $0.10 Jan - 09 to Dec - 09 total: 1,227,418 41,892 2,596 $149,304 $27,601 Jan - 10 to Dec - 10 total: 1,128,821 38,527 2,337 $111,527 $15,104 Jan - 09 to Dec - 09 avg: Jan - 10 to Dec - 10 avg: $0.12 $0.10 Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

33 Draft Energy Audit Report Anchorage School District Facilities/Maintenance 160,000 ASD Facility Maintenance - Electric Consumption (kwh) vs. Electric Cost ($) $25, , ,000 $20,000 Electric Consumption (kwh) 100,000 80,000 60,000 $15,000 $10,000 Electric Cost ($) Electric Consumption (kwh) Electric Cost ($) 40,000 $5,000 20,000 0 $0 Date (Mon -Yr) Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

34 Appendix B AkWarm Commercial Reports Coffman Engineers, Inc. 6/11/2012

35 Energy Audit Energy Analysis and Cost Comparison AkWarm Commercial Audit Software Anchorage School District Facility Maintenance Building Page 3 ENERGY AUDIT REPORT PROJECT SUMMARY Created 10/21/2011 3:39 PM General Project Information PROJECT INFORMATION Building: Anchorage School District Facility Maintenance Building Address: 1301 Labar St. City: Anchorage Client Name: Bob Holben Client Address: 1301 Labar Street Anchorage, AK Client Phone: (907) AUDITOR INFORMATION Auditor Company: Coffman Engineers, Inc Auditor Name: Walter Heins, PE Auditor Address: 800 F Street Anchorage, AK Auditor Phone: (907) Auditor FAX: (907) Auditor Comment: Client FAX: Design Data Building Area: 63,100 square feet Typical Occupancy: 0 people Actual City: Anchorage Weather/Fuel City: Anchorage Design Heating Load: Design Loss at Space: 879,747 Btu/hour with Distribution Losses: 879,747 Btu/hour Plant Input Rating assuming 82.0% Plant Efficiency and 25% Safety Margin: 1,341,078 Btu/hour Note: Additional Capacity should be added for DHW load, if served. Design Indoor Temperature: 67.5 deg F (building average) Design Outdoor Temperature: -18 deg F Heating Degree Days: 10,816 deg F-days Coffman Engineers, Inc. 6/11/2012

36 Utility Information Electric Utility: Chugach Electric - Commercial - Lg Average Annual Cost/kWh: $0.110/kWh Natural Gas Provider: Enstar Natural Gas - Commercial - Lg Average Annual Cost/ccf: $0.950/ccf Coffman Engineers, Inc. 6/11/2012

37 Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Other Electrical Cooking Clothes Drying Ventilation Fans Service Fees Total Cost Existing Building With Proposed Retrofits $33,791 $0 $1,398 $47,876 $66,473 $0 $0 $9,491 $0 $159,029 $23,734 $0 $1,398 $38,531 $66,473 $0 $0 $4,663 $0 $134,799 SAVINGS $10,057 $0 $0 $9,345 $0 $0 $0 $4,828 $0 $24,230 Coffman Engineers, Inc. 6/11/2012

38 Annual Energy Costs by End Use $200,000 $150,000 Ventilation and Fans Space Heating Other Electrical Lighting Domestic Hot Water $100,000 $50,000 $0 Existing Retrofit Coffman Engineers, Inc. 6/11/2012

39 Coffman Engineers, Inc. 6/11/2012

40 Coffman Engineers, Inc. 6/11/2012

41 Appendix C Major Equipment List Coffman Engineers, Inc. 6/11/2012

42 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE ESTIMATED REMAINING USEFUL LIFE NOTES B 1 Boiler Rm Building Heating Weil McLain 1178 Forced Draft, Gas Fired 1,527 MBH 80% 1/ B 2 Boiler Rm Building Heating Weil McLain 1178 Forced Draft, Gas Fired 1,527 MBH 80% 1/ WH 1 Boiler Rm Domestic Hot Water State SBD85500 NEA120 Natural Draft, Gas Fired 500 MBH 70% N/A P 1 Boiler Rm B 1 Circ Grundfos P 2 Boiler Rm B 2 Circ Grundfos P 3 Boiler Rm B 1 Blend Grundfos P 4 Boiler Rm B 2 Blend Grundfos P 5 Boiler Rm B 1 Jockey Grundfos P 6 Boiler Rm B 2 Jockey Grundfos P 7A P 7B Boiler Rm Boiler Rm Main Loop Circ Main Loop Circ Grundfos Grundfos UPS /F UPS /F UPS 40 80/4F UPS 40 80/4F UPS 43 75/F UPS 43 75/F UPS /F UPS /F Inline 134 gpm 82% 1.5 HP 10 2 Inline 134 gpm 82% 1.5 HP 10 2 Inline 67 gpm 82% 1/3 HP 10 2 Inline 67 gpm 82% 1/3 HP 10 2 Inline 33 gpm 82% 1/8 HP 10 2 Inline 33 gpm 82% 1/8 HP 10 2 Inline 134 gpm 82% 3 HP 10 2 Inline 134 gpm 82% 3 HP 10 2 Coffman Engineers, Inc. 6/11/2012

43 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE ESTIMATED REMAINING USEFUL LIFE NOTES AHU 1 First Floor Wood Shop AHU 2 h AHU 3 h AHU 4 h Second Floor Second Floor Second Floor South Office MCR Area North Offices Jackson and Church Trane Trane AHU 5 h First Floor Metal Shop Trane N/A Climate Changer Climate Changer Cabinet Fan with Gas Fired Burner Cabinet Fan Cabinet Fan N/A N/A N/A McQuay N/A Cabinet Fan N/A Climate Changer Cabinet Fan N/A 60% Motor 78.5% Motor 78.5% Motor 60% Motor 78.8% Motor 1.5 HP HP 25 1 HP 25 1 HP 25 3 HP 25 0 years (Original Unit) Age Unknown Age Unknown Age Unknown Age Unknown FCU 1 FCU 2 AC 1 AC 2 Rooftop Rooftop IT Room IT Room AC for Mezzanine AC for Mezzanine AC for IT Room AC for IT Room Mitsubishi Mitsubishi Mitsubishi Mitsubishi Mr. Slim Series Mr. Slim Series Mr. Slim Series Mr. Slim Series Split DX System Split DX System Split DX System Split DX System 41,000 BTU/hr cooling 41,000 BTU/hr cooling 30,000 BTU/hr cooling 30,000 BTU/hr cooling SEER = 10 N/A SEER = 10 N/A N/A N/A N/A N/A Coffman Engineers, Inc. 6/11/2012

44 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE ESTIMATED REMAINING USEFUL LIFE NOTES AC 3 d IT Room AC for IT Room Mitsubishi Mr. Slim Series Split DX System 30,000 BTU/hr cooling N/A N/A d During the site visit this existing mechanical unit was not named or numbered. In this table, this unit is numbered for organizational purposes only, and may not correspond to nomenclature used in the past. Coffman Engineers, Inc. 6/11/2012

45 Appendix D Energy Conservation Measures Coffman Engineers, Inc. 6/11/2012

46 The following tables consist of raw output data from the AkWarm Commercial program used to model energy costs and calculate energy savings and financial ratios. These tables represent all of the energy conservation measures calculated and considered by the energy audit team. However, ECMs included in the Executive Summary and Section VIII are recommended by the energy audit team due to their viable financial ratios (SIR>1) or due to their value added. PRIORITY LIST RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 1 Ventilation Turn off constantly running AHUs during unoccupied times. $4,898 $2, Lighting: MCR and Automation Offices 3 Setback Thermostat: Office Space 4 Lighting: Electronic, Paint, Door, Glass and Metal Shops 5 Lighting: Automation Office 114A Add new Occupancy Sensor Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Office Space. Replace with 6 FLUOR T5 45.2" F54W/T5 HO Standard StdElectronic Add new Occupancy Sensor and Improve Manual Switching $1,077 $ $2,553 $2, $948 $1, $80 $ Lighting: Office Add new Occupancy Sensor 7 Lighting: Office Add new Occupancy Sensor $108 $ $517 $1, Setback Thermostat: Shop Area Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Shop Area space. $667 $2, Lighting: Office Add new Occupancy Sensor $810 $3, Lighting: Vehicle Maintenance Shop Replace with FLUOR (4) T5 45.2" F54W/T5 HO Standard (2) StdElectronic $60 $ Coffman Engineers, Inc. 6/11/2012

47 PRIORITY LIST RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 11 Lighting: Office Add new Occupancy Sensor $63 $ Lighting: Electronic, Paint, Door, Glass and Metal Shops 13 Lighting: Corridor 14 Lighting: Exterior Lighting 15 HVAC And DHW 16 Exterior Door: Main Building - Double Door 17 Garage Door: Main Building - Wood Overhead Door 18 Lighting: Exterior Lighting Replace with 6 FLUOR (3) T8 4' F32T8 32W Standard Program StdElectronic Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic Replace with 25 LED 80W Module StdElectronic Install exhaust stack economizer on both boilers. Remove existing door and install standard prehung U-0.16 insulated door, including hardware. Replace existing garage door with R-7, 2" polyurethane core replacement door. Replace with 15 LED 4W Module StdElectronic $125 $ $36 $ $2,102 $17, $1,868 $20, $181 $2, $88 $1, $3,176 $37, Air Tightening Perform air sealing to reduce air leakage by 30%. 20 Lighting: Office Replace with 12 FLUOR (2) T8 F32T8 32W U- Tube Standard Program StdElectronic and Add new Occupancy Sensor $1,385 $10, $182 $2, Coffman Engineers, Inc. 6/11/2012

48 PRIORITY LIST RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings Installed Cost SIR Payback (Years) 21 Lighting: Utility Improve Manual Switching $12 $ Exterior Door: Main Building - Double Door 23 Exterior Door: Main Building - Std Man Doors 24 Cathedral Ceiling: Main Building - Hot Roof 25 Window/Skylight : Main Building - Windows 26 Window/Skylight : Main Building - Mezzanine Windows 27 Window/Skylight : Main Building - Main Entry Remove existing door and install standard prehung U-0.16 insulated door, including hardware. Remove existing door and install standard prehung U-0.16 insulated door, including hardware. Install R-10 rigid board insulation. No cost included for covering insulation. Install single pane storm window on exterior Install single pane storm window on exterior Replace existing windows with Low E/argon fiberglass or insulated vinyl windows $51 $1, $168 $4, $2,274 $73, $191 $10, $379 $20, $67 $3, Lighting: Utility Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic $30 $2, Window/Skylight : Main Building - South - Single Pane Replace existing windows with Low E/argon fiberglass or insulated vinyl windows $58 $5, Coffman Engineers, Inc. 6/11/2012

49 PRIORITY LIST RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings 30 Lighting: Utility Replace with 9 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic Installed Cost SIR Payback (Years) $9 $ Lighting: Mechanical Room Window/Skylight : Main Building - Windows 33 Window/Skylight : Main Building - South - Double Pane 34 Garage Door: Main Building - Metal Overhead Door Replace with 11 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic Replace existing windows with Low E/argon fiberglass or insulated vinyl windows Replace existing windows with Low E/argon fiberglass or insulated vinyl windows Replace existing garage door with R-7, 2" polyurethane core replacement door. $11 $1, $21 $3, $4 $ $30 $10, TOTAL $24,230 $245, Note: ECM #F/M-1 and F/M-12 in the Executive Summary at the beginning of the report were modeled with separate AkWarm models, due to the modeling limitations of improvement items in AkWarm. As a result, ECM #F/M-1 and F/M-19 from the Executive Summary are not additive measures and therefore are not included in Appendix D. Coffman Engineers, Inc. 6/11/2012

50 ENERGY AUDIT REPORT ENERGY EFFICIENT RECOMMENDATIONS 1. Building Envelope Insulation Rank Location Existing Type/R-Value Recommendation Type/R-Value Installed Cost Annual Energy Savings 24 Cathedral Ceiling: Main Building - Hot Roof Framing Type: I-Beam (TJI) Framing Spacing: 24 inches Insulated Sheathing: EPS (Beadboard), 3.75 inches Bottom Insulation Layer: None Top Insulation Layer: None Modeled R-Value: 17.3 Install R-10 rigid board insulation. No cost included for covering insulation. $73,314 $2,274 Exterior Doors Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 16 Exterior Door: Main Building - Double Door 17 Garage Door: Main Building - Wood Overhead Door 22 Exterior Door: Main Building - Double Door 23 Exterior Door: Main Building - Std Man Doors 34 Garage Door: Main Building - Metal Overhead Door Door Type: R-1 Door (nonstandard, not exterior) Modeled R-Value: 1 Door Type: Un-insulated Wood Door Insulating Blanket: None Modeled R-Value: 1.8 Door Type: Metal - fiberglass or mineral wool Modeled R-Value: 1.7 Door Type: Metal - fiberglass or mineral wool Modeled R-Value: 1.7 Door Type: 1-3/4" sectional door, polyurethane core Insulating Blanket: None Modeled R-Value: 6.3 Remove existing door and install standard prehung U-0.16 insulated door, including hardware. Replace existing garage door with R-7, 2" polyurethane core replacement door. Remove existing door and install standard prehung U-0.16 insulated door, including hardware. Remove existing door and install standard prehung U-0.16 insulated door, including hardware. Replace existing garage door with R-7, 2" polyurethane core replacement door. $2,928 $181 $1,492 $88 $1,366 $51 $4,509 $168 $10,515 $30 Coffman Engineers, Inc. 6/11/2012

51 Windows and Glass Doors Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 25 Window/Skylight: Main Building - Windows 26 Window/Skylight: Main Building - Mezzanine Windows 27 Window/Skylight: Main Building - Main Entry 29 Window/Skylight: Main Building - South - Single Pane 32 Window/Skylight: Main Building - Windows Glass: Double, glass Frame: Aluminum, No Thermal Break Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.81 Solar Heat Gain Coefficient: 0.46 Glass: Double, glass Frame: Aluminum, No Thermal Break Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.81 Solar Heat Gain Coefficient: 0.46 Glass: Single, Glass Frame: Aluminum, No Thermal Break Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 1.30 Solar Heat Gain Coefficient: 0.52 Glass: Single, Glass Frame: Wood\Vinyl Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.94 Solar Heat Gain Coefficient: 0.52 Glass: Double, glass Frame: Wood\Vinyl Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.51 Solar Heat Gain Coefficient: 0.46 Install single pane storm window on exterior Install single pane storm window on exterior Replace existing windows with Low E/argon fiberglass or insulated vinyl windows Replace existing windows with Low E/argon fiberglass or insulated vinyl windows Replace existing windows with Low E/argon fiberglass or insulated vinyl windows $10,282 $191 $20,400 $379 $3,800 $67 $5,031 $58 $3,953 $21 Coffman Engineers, Inc. 6/11/2012

52 33 Window/Skylight: Main Building - South - Double Pane Glass: Double, glass Frame: Wood\Vinyl Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.51 Solar Heat Gain Coefficient: 0.46 Replace existing windows with Low E/argon fiberglass or insulated vinyl windows $900 $4 Air Leakage Rank Location Estimated Air Leakage Recommended Air Leakage Target Installed Cost Annual Energy Savings 19 Air Tightness estimated as: cfm at 50 Pascals Perform air sealing to reduce air leakage by 30%. $10,000 $1, Mechanical Equipment Mechanical Rank Recommendation Installed Cost Annual Energy Savings 15 Install exhaust stack economizer on both boilers. $20,000 $1,868 Setback Thermostat Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 3 Office Space Existing Unoccupied Heating Setpoint: 70.0 deg F 8 Shop Area Existing Unoccupied Heating Setpoint: 65.0 deg F Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Office Space. Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Shop Area space. $2,000 $2,553 $2,000 $667 Coffman Engineers, Inc. 6/11/2012

53 Ventilation Rank Recommendation Cost Annual Energy Savings 1 Turn off constantly running AHUs during unoccupied times. $2,000 $4, Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 2 MCR and Automation Offices 4 Electronic, Paint, Door, Glass and Metal Shops 5 Automation Office 114A 25 FLUOR (4) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching 6 MH 400 Watt Magnetic with Manual Switching 5 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching 6 Office 17 FLUOR (3) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching 7 Office 120 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching 9 Office 96 FLUOR (4) T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching 10 Vehicle Maintenance Shop MH 400 Watt Magnetic with Manual Switching Add new Occupancy Sensor Replace with 6 FLUOR T5 45.2" F54W/T5 HO Standard StdElectronic Add new Occupancy Sensor and Improve Manual Switching Add new Occupancy Sensor Add new Occupancy Sensor Add new Occupancy Sensor Replace with FLUOR (4) T5 45.2" F54W/T5 HO Standard (2) StdElectronic $900 $1,077 $1,350 $948 $150 $80 $300 $108 $1,500 $517 $3,000 $810 $225 $60 Coffman Engineers, Inc. 6/11/2012

54 Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 11 Office 28 FLUOR T8 4' F32T8 32W Standard Program StdElectronic with Manual Switching 12 Electronic, Paint, Door, Glass and Metal Shops 6 FLUOR (3) T12 4' F40T12 40W Standard Magnetic with Manual Switching 13 Corridor 2 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Add new Occupancy Sensor Replace with 6 FLUOR (3) T8 4' F32T8 32W Standard Program StdElectronic Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic 14 Exterior Lighting 25 HPS 150 Watt Magnetic Replace with 25 LED 80W Module StdElectronic 18 Exterior Lighting 15 HPS 750 Watt Magnetic with Manual Switching 20 Office 12 FLUOR (2) T12 F40T12 40W U-Tube Standard Magnetic with Manual Switching 21 Utility MH 400 Watt Magnetic with Manual Switching 28 Utility 2 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching 30 Utility 9 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching 31 Mechanical Room FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 15 LED 4W Module StdElectronic Replace with 12 FLUOR (2) T8 F32T8 32W U- Tube Standard Program StdElectronic and Add new Occupancy Sensor Improve Manual Switching Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic Replace with 9 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic Replace with 11 FLUOR (2) T8 4' F32T8 32W Standard Program StdElectronic $450 $63 $900 $125 $300 $36 $17,500 $2,102 $37,500 $3,176 $2,550 $182 $100 $12 $2,000 $30 $900 $9 $1,650 $11 Coffman Engineers, Inc. 6/11/2012

55 Appendix E Site Visit Photos Coffman Engineers, Inc. 6/11/2012

56 1. East side of building 2. Looking south across roof 3. North side of building 4. Typical double door 5. West side of building 6. 3,000 gal heating oil tank Coffman Engineers, Inc. 6/11/2012

57 7. Dual fuel, gas-oil, boilers B-1 and B-2 8. Heating oil day tank for boilers 9. Gas-fired hot water heater WH Main circulation pumps P-7A and P-7B 11. AHU-1 serves Wood Shop 12. AHU-2 i serves south offices on second floor Coffman Engineers, Inc. 6/11/2012

58 13. AHU-3 i serves MCR Area 14. AHU-4 i serves north offices on second floor 15. AHU-5 i is located in Metal Shop 16. Siemens APOGEE Building Controller 17. Wood Shop 18. Roof top AC Units FCU-1 and FCU-2 Coffman Engineers, Inc. 6/11/2012

59 19. AC units for IT Server Room AC-1, 2 and 3 e 20. Onsite Portable Building 21. Onsite Portable Building 22. Onsite Portable Building e During the site visit this existing mechanical unit was not named and numbered. In this table, this unit is numbered for organizational purposes only, and may not correspond to nomenclature used in the past. Coffman Engineers, Inc. 6/11/2012

60 Appendix F Thermographic Photos Coffman Engineers, Inc. 6/11/2012

61 ASD Facilities/Maintenance Coffman Engineers made miscellaneous thermographic images of the building using a FLIR T300 Infrared Camera. This is not a thermographic study, but rather just a few snapshots to illustrate easyto-identify heat losses. Yellow color indicates heat losses. Outside temperature was 40 F. 23. East side from Northeast. Extensive heat loss at glazing. 24. North side from Northeast. Heat loss indicated at roof/wall joint 25. North side doors. Heat loss can be seen rising above overhead door. 26. South side from Southwest. Heat loss at construction joints, second floor, and roof/wall joint Coffman Engineers, Inc. 6/11/2012

62 ASD Facilities/Maintenance Coffman Engineers made miscellaneous thermographic images of the building using a FLIR T300 Infrared Camera. This is not a thermographic study, but rather just a few snapshots to illustrate easyto-identify heat losses. Yellow color indicates heat losses. Outside temperature was 40 F. 27. South side. Solid wall in front of truck is apparently un-insulated. 28. South side from Southeast. Heat losses indicated at un-insulated wall, second floor, and roof/wall joint. 29. Thermographic image of a typical portable structure. Minimal insulation is illustrated by heat loss at studs, trusses, crawlspace, and door. Coffman Engineers, Inc. 6/11/2012

63 ASD Facilities/Maintenance Coffman Engineers made miscellaneous thermographic images of the building using a FLIR T300 Infrared Camera. This is not a thermographic study, but rather just a few snapshots to illustrate easyto-identify heat losses. Yellow color indicates heat losses. Outside temperature was 40 F. 30. Older portable building exhibits heat loss at substandard doors & windows. 31. Grounds Office portable illustrates heat loss at windows and roof insulation defect. 32. Heat loss at door of paint storage building indicates minimal insulation and heat loss at weather-stripping. 33. Portable office shows typical heat losses plus defective insulation in wall. Coffman Engineers, Inc. 6/11/2012