Massachusetts Energy Code Technical Support Initiative. Commercial Energy Code Lighting & Electrical Provisions

Transcription

1 Massachusetts Energy Code Technical Support Initiative Commercial Energy Code Lighting & Electrical Provisions

2 Codes and Standards Initiative - Sponsors

3 Who is Mass Save? Mass Save is an initiative sponsored by Massachusetts gas and electric utilities and energy efficiency program administrators, including Columbia Gas of Massachusetts, The Berkshire Gas Company, Cape Light Compact, National Grid, Liberty Utilities, Eversource and Unitil. The Sponsors of Mass Save work closely with the Massachusetts Department of Energy Resources to provide a wide range of services, incentives, trainings, and information promoting energy efficiency that help residents and businesses manage energy use and related costs. 3

4 Commercial Incentive Offers Commercial New Construction Incentives for efficiency levels beyond code: Whole building incentives System incentives including Air Compressors Chillers Lighting and Lighting Controls Gas-Fired Heating Equipment Variable Speed Drives Custom Measures And more We also offer incentives and rebates for existing buildings as well. Please visit for the details. 4

5 Mass Save Energy Code Technical Support Project Specific Code Assistance MA code officials Design professionals Contractors Subcontractors Material suppliers Others Toll-free energy code support Phone assistance Office visits Project site visits 5

6 AIA Continuing Education CLEAResult is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-aia members are available on request. This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. 6

7 Disclosure These trainings are being offered through the support of Mass Save and in cooperation with the Massachusetts Board of Building Regulations and Standards (BBRS). The Energy Code Technical Support staff, consisting of CLEAResult and other contractors, are not code officials, and the information provided through the program is not a formal interpretation of the code. Your local building code official is responsible for the enforcement of the code and the Massachusetts BBRS is the governing body responsible for interpretations of the code. 7

8 Learning Objectives To become familiar with the 2015 I-Code and the Massachusetts Amendments of the commercial electric power and lighting provision updates of the Massachusetts Energy Conservation Code 8

9 Agenda Scope and Administration Commercial Energy Efficiency General & Building Compliance Building Envelope Electrical Power & Lighting System Interior Lighting Exterior Lighting Other Electrical Power Systems Additional Efficiency Package Options System Commissioning Existing Buildings (New Chapter) Summary of 2015 Lighting and Electrical Power updates and MA Amendments 9

10 Energy Savings 45% 45 47% 30% 15% 0%

11 Commercial Code 2015 Update Summary 11

12 Summary of IECC 2015 Lighting and Electrical System Updates New chapter covering lighting in existing buildings New requirements, diagrams and definitions for daylight zones and daylight responsive controls Occupancy sensors required in more spaces Minimum skylight area expanded Revised hotel room lighting controls Revised LPD tables Minimum efficiencies for transformers and motors New requirements for elevator cabs and horizontal transportation system Additional package options in C406 12

13 Summary of MA Amendments Replace IECC Chapter 1 with MA Chapter 1 ASHRAE Appendix G can use site or source energy At least two additional efficiency package options from Section C406 required (using IECC or ASHRAE 90.1) Allows two additional onsite renewable energy sources under Section C406: BIOMASS GEOTHERMAL EXCHANGE Allows additional methods for using the IECC performance path 13

14 General Overview 14

15 Chapter 1 Scope & Administration 15

16 Chapter 1 Scope and Administration 16

17 C103 Construction Documents MA Amendment Section Construction Documents must be drawn to scale and include: Location and nature of work Equipment and systems Code official discretion: Prepared by a registered design professional Electronic media documents permitted Source: Shutterstock 17

18 C104 Inspections MA Amendment Section 110 Energy efficiency inspections required to determine compliance with Chapter 13 Source: NREL 18

19 Chapter 4 Commercial Energy Efficiency 19

20 Chapter 4 Section C401 20

21 C401 General (MA Amendment C402.1) 21

22 C401.2 Commercial Compliance Path Massachusetts Commercial Energy Code ASHRAE IECC-2015 Modeled Performance (Chapter 11 + C406 2 packages OR Appendix G modified by ) Prescriptive (+ C406 2 packages) Modeled Performance (C407) Prescriptive (C402-C405, C406 2 packages) Buildings being designed utilizing ASHRAE , Ch. 11 ECB or Prescriptive, must comply with C406 Item #2 as well as at least one of the remaining items 22

23 C401.2 Commercial Compliance Methods IECC 2015 & Massachusetts Amendments Prescriptive Checklists Software Based Compliance; COMcheck ASHRAE Compliance Prescriptive requirements (plus 2 IECC C406 packages) Building Performance Methodology: Energy Cost Budget Method (Section11) (plus 2 IECC C406 packages) Performance Rating Method: Appendix G (modified by ) Exception: When using Appendix G, building energy consumption comparison may be performed on a site energy and/or on a source energy basis C Compliance with a code official approved above code program/performance protocol 23

24 C401.2 Commercial Compliance Path Massachusetts Commercial Energy Code ASHRAE IECC-2015 Modeled Performance (Chapter 11 + C406 2 packages OR Appendix G modified by ) Prescriptive (+ C406 2 packages) Modeled Performance (C407) Prescriptive (C402-C405, C406 2 packages) HERS PHIUS ENERGY STAR 24

25 Alternative Commercial Compliance Methods C407 Total Building Performance MA Amendment C RESNET Approved Software for Home Energy Rating System (HERS) Multifamily Buildings up to 5 Stories HERS Score of 55 or better Passive House Institute US (PHIUS) Approved Software ENERGY STAR Homes 3.1 path Low-rise Multifamily MA Amendment C402.6 Software Based Compliance; COMcheck 25

26 C401.2 IECC Commercial Compliance Path IECC-2015 Prescriptive Path (C402-C405, C406) Assembly U-factor, C-factor or F-factor Component performance alternative (COMcheck) Modeled Performance (C407) HERS PHIUS ENERGY STAR Envelope C402 HVAC C403 Service Hot Water Heating C404 Electric Power & Lighting C405 Additional Efficiency Packages C406 (at least two) Lighting Controls C405.2 Interior Lighting Power C405.4 Exterior Lighting C405.5 Electrical Transformers and Motors C405.7 & C405.8 Vertical and Horizontal Transportation Systems and Equipment C405.9) 26

27 MA Stretch Code Municipalities 27

28 MA Stretch Code Update - Commercial Compliance For municipalities that have adopted the MA Stretch Code, modeled performance compliance is the only option Buildings >100,000 SF and new supermarkets, laboratories and conditioned warehouses >40,000 SF Other new commercial buildings Compliance Base code w/ MA amendments and at least 10% below ASHRAE Appendix G Base code w/ MA amendments No additional requirements 28

29 ASHRAE Requirements that Differ From IECC

30 ASHRAE Requirements that Differ From IECC 2015 ASHRAE IECC 2015 Dwelling units in apartments exempt from lighting power requirements No specific window to wall ratio requirements for daylight area Daylight responsive controls required in secondary daylight zones Max voltage drop for feeders of 2% at design load & 3% at branch circuits Automatic receptacle control for 50% of receptacles in certain spaces Separately monitor total electrical energy, HVAC, interior lighting, exterior lighting, and receptacles Must include 2 Additional Efficiency Package options from IECC C406, one of which must be Reduced Lighting Power (except App. G) Sleeping units exempt but must comply with R404.1, not <75% lamps in permanently installed fixtures or lighting fixtures shall be high-efficacy Window to wall ratio > 40% requires daylighting controls No requirements for controls in secondary daylight zones No requirements for voltage drop Only includes hotel & motel controls for switched receptacles No electrical energy monitoring requirements Must include 2 Additional Efficiency Package options from IECC C406 30

31 Chapter 4 Lighting Requirements in Section C402 31

32 C402.1 Low Energy & Equipment Buildings Must comply with interior and exterior lighting requirements but are exempt from building envelope provisions: Buildings with a design rate of energy usage less than 3.4 Btu/h (or 1.0 watt) per ft 2 for space heating Buildings that contain no conditioned space Specialized electronic equipment buildings No commercial buildings are exempt from lighting, mechanical, and service water heating provisions 32

33 C Increased Vertical Fenestration Area Vertical fenestrations limited to 30% of total above grade wall area Up to 40% permitted if the following is met: In buildings 2 stories or less, not less than 50% of the net floor area is within a daylight zone In buildings with 3 or more stories, no less than 25% of the net floor is within a daylight zone Daylight responsive controls installed in daylight zones Visible transmittance (VT) of vertical fenestration is not less than 1.1 times SHGC Source: originalgreen.org 33

34 C Increased Skylight Area Skylight area shall be permitted to be not more than 5% of the roof area provided daylight responsive controls are installed in daylight zones under skylights 34

35 C Minimum Skylight Fenestration Area Required; minimum skylight area for some enclosed spaces > 2,500 ft 2 directly under a roof where 75% of the ceiling area has a height greater than 15 Total daylight zone under skylights to be 50% of the floor area A minimum % of skylight area to daylight zone 3% Or; provide a minimum aperture of 1% Source: Daylighting Pattern Guide 35

36 C Increased Skylight SHGC and U-Factor Skylights above daylight zones with daylight-responsive controls are permitted: To have a maximum SHGC of 0.60 To have a maximum U-Factor of 0.75 Source: Daylighting Pattern Guide 36

37 Chapter 4 Section C405 37

38 C405 Electrical Power & Lighting Systems C405.1 General C405.2 Lighting Controls C405.3 Exit Signs C405.4 Interior Lighting Power C405.5 Exterior Lighting Power C405.6 Electrical Energy Consumption C405.7 Electrical Transformers (New) C405.8 Electrical Motors (New) C405.9 Transportation Systems (New) 38

39 405.2 Lighting Controls All spaces must have controls Some spaces have automatic control requirements Occupant sensor controls Time-switch controls Daylight-responsive controls Specific application controls No automatic control requirements Exceptions: Security or emergency areas that require continuous lighting Interior stairways and corridors (means of egress) Emergency egress lighting that is normally off 39

40 Occupancy & Vacancy Controls What s the Difference? Occupancy sensors: Turns lights on upon sensing occupancy Turn lights off when space is vacated Best for open spaces and/or spaces lacking ambient light Vacancy sensors (occupancy sensors with manual ON ): Turn lights off when space is vacated Lights must be turned on manually Best for private offices with some ambient light 40

41 C Occupant Sensor Controls Occupant based sensors required for most interior spaces that can Automatically turn off lights within 30 minutes of all occupants leaving space Be manual on or automatically controlled to turn on not more than 50% power Full automatic-on controls permitted in public corridors, stairways, restrooms, restrooms, building entrance & lobbies, and life safety areas Include manual control for turning lights off Exceptions for warehouses Lighting in aisle ways and open areas must be individually controlled with occupant sensors to automatically reduce lighting power by 50% when areas are unoccupied 41

42 C Time-switch Controls Areas without occupant sensor controls must have timeswitch controls with the following functionality: A minimum 7-day clock Capable of being set for 7 different day types Automatic holiday shutoff Program backup capabilities Include manual override switch that allows controlled lighting to be turned on for no more than 2 hours. Individual override switch controls only lighting in area <5,000 SF 42

43 C Time-switch Controls Exceptions Areas where manual controls provides light reduction, timeswitch controls are not required for sleeping units, patient care spaces, life safety areas and continuous operation, shop & laboratory classrooms Certain applications (malls, arcades, auditoriums, retail, industrial, arena) may have a time limit greater than 2 hrs. if override switch is captive key device. Also area may be >5,000 SF but must be <20,000 SF Where manual control, spaces that only have 1 luminaire with rated power <100W or spaces that use <0.6 W/SF or corridors, equipment rooms, electrical/mechanical rooms, etc. are not required to have light reduction control 43

44 C Light-reduction Controls Light reduction controls must allow the occupant to reduce connected lighting by at least 50% and in a reasonably uniform illumination pattern Must be achieved by one of the following: Controlling all lamps or luminaires Dual switching of alternate luminaire rows, alternate luminaires or lamps Independent switch for lamps and or luminaires Exception: Light reduction controls not required in daylight zone with daylight responsive controls complying with Section C

45 C Daylight-responsive Controls Daylight zones must have daylight-responsive controls to control electric lights within those zones Spaces within sidelight & toplight daylight zones with more than 150W of general lighting General lighting does not include specific application control (display, accent lighting, hotel sleeping units, etc.) Credit: NREL - Joe Ryan Exceptions: Not required for patient care spaces, dwelling & sleeping units, specific Source: Daylighting application Pattern Guide control, sidelight daylight zones on the 1 st floor above grade in Group A-2 & M occupancies 45

46 C Daylight-responsive Controls Daylight-responsive controls must comply with the following: Lights in toplight daylight zones must be controlled independently of lights in sidelight daylight zones Controls must be able to be calibrated within space & calibration mechanisms must be readily accessible Controls shall be capable of complete shutoff of all controlled lights In offices, classrooms, labs and library reading rooms, daylightresponsive controls must dim lights continuously from full light output to <15% of full light output Independent control of lights in sidelight zones facing different cardinal orientations Exception: Up to 150W in each space permitted to be controlled together in a daylight zone facing multiple cardinal orientations 46

47 C Daylight Zones SIDELIGHT DAYLIGHT ZONE TOPLIGHT DAYLIGHT ZONE ROOF FENESTRATION TOPLIGHT DAYLIGHT ZONE SLOPED ROOFTOP MONITOR TOPLIGHT DAYLIGHT ZONE ROOFTOP MONITOR 47

48 C Specific Application Controls Specific application controls must be provided for the following: Display and accent lighting must be controlled independently of other lighting within the room or space Supplemental task lighting must have a control device integral to the luminaires or be controlled by a readily accessible wall-mounted control device Hotel sleeping units and suites must have a master control device capable of auto shutoff within 20 minutes of all occupants leaving room Exceptions: Lighting and switched receptacles controlled by captive key systems 48

49 C Exterior Lighting Controls Exterior Lighting shall: Be provided with automatic controls that turns off lighting as a function of available daylight Building façade or landscape lighting to be automatically controlled as a function of dawn/dusk and a set opening and closing time For other applications, the automatic lighting controls shall configured to reduce lighting power by not less than 30% from not later than midnight to 6am, from one hour after business closing to one hour before business opening or during any period when activity has not been detected for a time of longer than 15 minutes Exceptions: Emergency, health & safety areas, & lighting for covered vehicle entrances & exits from buildings/parking structures 49

50 C405.4 Interior Lighting Power A building complies with this section where its total connected lighting power is not greater than the interior lighting power Total connected interior lighting power includes: Fluorescent fixture rated wattage Screw-in socket labeled max wattage Low voltage lighting transformer rating Track 30 Watts/Ft or circuit breaker rating Source: a light Exceptions: Include over 15 different connected power devices that are not required to be included in calculation 50

51 C405.4 Interior Lighting Power LPD Lighting Total Watts/Ft 2 of Area Two paths: Building Area Method Allowable Watts Floor area for each building area type x LPD for the area Area defined as all contiguous spaces that accommodate or are associated with a single building area type When used for an entire building, each area type to be treated as a separate area Space-by-Space Method Allowable Watts Floor area of each space x LPD for the area Then sum the allowances for all the spaces Tradeoffs among spaces are allowed 51

52 C405.7 & C405.8 Electrical Transformers and Motors Electrical Transformers: Minimum efficiency requirements for single-phase and threephase transformers greater than 15 kva Tested in accordance with DOE 10 CFR 431 and verified under an approved certification program or data supplied by the manufacturer Electric motors: Minimum efficiency requirements for open drip-proof and totally enclosed fan-cooled motors with a motor hp >1 Tested in accordance with DOE 10 CFR 431 and verified under an approved certification program or, where a certification program does not exist, data supplied by the manufacturer 52

53 C Vertical Transportation Systems and Equipment Elevators shall meet the following requirements: For the luminaires in each cab, the sum of the lumens divided by the sum of the watts must be >35 lumens per watt Ventilation fans in elevators that do not have their own AC system must not consume more than 0.33 watts/cfm at max rated speed of fan Include controls that will de-energize ventilation fans and lighting systems when elevator is stopped, unoccupied and with its doors closed for over 15 minutes 53

54 C Horizontal Transportation Systems and Equipment Escalators and Moving Walks shall meet the following requirements: Must comply with ASME A17.1/CSA B44 Must have automatic controls configured to reduce speed to the minimum permitted Escalators designed either for one-way down operation only or for reversible operation shall have a variable speed regenerative drive that supplies the building electrical system when escalator is loaded with passengers whose weight >750 lbs. 54

55 Chapter 4 Section C406 55

56 C406 Additional Efficiency Package Options C406.1: Package options expanded and two required Buildings shall comply with at least two of the following: 1. Efficient HVAC Performance Minimum Efficiency Requirements for Mechanical Equipment Tables C Efficient Lighting Systems Reduced LPD per C Enhance lighting controls in accordance with Section C406.4 (New) 4. On-Site Renewable Energy Systems - comply with one of four options C406.5 (Expanded) 5. Provisions of a dedicated outdoor air system for certain HVAC equipment in accordance with Section C406.6 (New) 6. High-efficiency service water heating for certain building types use water heat recovery/combined heat and power or a solar water-heating system sized to meet not less than 60% of the hot water requirements. C406.7 (New) Buildings being designed utilizing ASHRAE (except App. G) must comply with Item #2 as well as at least one of the remaining items. 56

57 C406.3 Reduced Light Power Density Two options: 90% of interior lighting power values specified in Tables C (1) times the floor area for building type or; 90% of interior light power allowance calculated by the space-by-space method 57

58 C406.4 Enhanced Digital Lighting Controls Interior lighting in the building must have the following controls: Luminaires must be capable of continuous dimming Luminaires must be capable of being addressed individually Not more than 8 luminaires may be controlled together in a daylight zone Fixtures must be controlled through a digital control system CD s must include submittal of a Sequence of Operations Comply with function testing of lighting controls in Section

59 C406.5 On-site Renewable Energy Total minimum ratings of on-site renewable energy must comply with one of the following: Provide not less than 0.50 Watts per ft2 of conditioned floor area Not less than 3% of the regulated energy used within the building for all regulated loads in Chapter 4 Provide not less than 65% of the total annual energy used within the building for building space and service water heating with biomass fuel using direct vented combustion mechanical equipment rated at a minimum of 80 AFUE. The biomass fuel shall meet the eligible fuel and emission criteria.* Provide not less than 65% of the total annual energy used within the building for building space and service water heating using a geothermal heat pump system with COP of not less than 4.* *MA specific amendment 59

60 Chapter 4 Section C408 60

61 C408 Commissioning Occupancy Sensor Controls Verify that occupancy sensors are located & aimed in accordance with manufacturer recommendations Projects with 7 or less sensors, testing of 100% is required Projects with 7 or more sensors, testing of each unique sensor & space type is required Where multiples of each unique sensor & space type, testing of not less than 10% is required If 30% or more of tested controls fail, all remaining identical combinations are required to be tested 61

62 C408 Commissioning Occupancy Sensor Controls Verify occupancy sensors include status indicator, verify correct operation Verify controls operate within the required time Verify auto-on occupancy sensors turn lights on when occupants enter space Verify manual-on occupancy sensors only turn lights on when manual activated Verify lights are not incorrectly turned on by movement in adjacent areas or HVAC operation 62

63 C408 Commissioning Time-switch controls Verify time-switch control is programmed with accurate weekday, weekend and holiday schedules Provide documentation to owner of controls programming, and set-up and preference programming Verify correct time and date in switch Verify any battery back-up is installed & energized Verify override is set to no more than 2 hours Verify occupied & unoccupied operation 63

64 C408 Commissioning Daylight responsive controls Verify control devices have been properly located, field calibrated and set for accurate setpoints & thresholds Verify lighting loads adjust to light level setpoints in response to available daylight Verify calibration mechanisms are readily accessible 64

65 Chapter 5 Existing Buildings 65

66 C501 General New Chapter Buildings Designated as Historic Requires a report to the code official signed by a registered design professional or the State Historic Preservation Office demonstrating that compliance would threaten, degrade or destroy the historic form, fabric or function of the building Requirements for existing buildings Additions Alterations Repairs and Maintenance Change of occupancy or use Source: David Lester Photography 66

67 C502 Additions Vertical fenestration (prescriptive): new fenestration that results in a total building fenestration area < 30% must comply with C402.4, including: Maximum area 30% gross above-grade wall area Maximum U- Factor/SHGC/VT from Prescriptive Table Minimum Skylight fenestration area 67

68 C502 Additions If > 30% for total building or addition alone, must comply with C Increased Vertical Fenestration Area with Daylight Responsive Control for the addition only Additions that result in total building vertical glass >40% must comply with C407 Total Building Performance 68

69 C502 Additions Skylight Area: new skylight area that results in total building skylight area of < 3% complies with C402.4, including: Maximum 3% of gross roof area Meet U-Factor of prescriptive table Minimum skylight fenestration area Lighting controls in daylight zones under skylights Haze factor 69

70 C502 Additions If > 3% for total building or addition alone, must comply with C Increased Skylight Area with Daylight Responsive Control for addition only Additions that result in total building skylight area >5% must comply with C407 Total Building Performance 70

71 C502 Additions Lighting power and systems C405 Interior comply with addition alone or addition plus existing building Exterior comply with addition alone or addition plus existing 71

72 C503 Alterations Alteration must comply with code as for new construction Alterations that comply with ASHRAE do not need to comply with C402-C405 72

73 C503 Alterations Unaltered portion(s) do not need to comply Alteration cannot make existing building less conforming than it may have already been Alteration shall not create an unsafe or hazardous condition or overload existing systems. Vertical Fenestration and Skylight Area similar to requirements for additions 73

74 C503 Alterations C503.1: (Exception 7) Alterations that replace less than 50 percent of the luminaires in a space, provided that such alterations do not increase the installed interior lighting power. C503.6: New Lighting systems that are part of the alteration to comply with C405 Exception alteration that replace <10% of the luminaires in a space provided such alteration does not increase the installed interior lighting power 74

75 C503 Change in Space Conditioning Unconditioned space that is altered to conditioned space must be brought into full compliance with code; including lighting Converting part of an unconditioned warehouse to office space Shell building tenant build-out > 75

76 C504 Repairs Work on non-damaged components necessary for the required repair or damaged components shall be considered part of the repair and not subject to the alterations requirements 76

77 C504 Repairs Activities deemed repairs by the code: Repairs where only the bulb and/or ballast within the existing luminaires in a space are replaced provided the replacement does not increase the installed interior lighting power Repairs exempt from permit Abatement of wear due to normal service conditions Repairs to buildings designed to ASHRAE 90.1 as long as the repair complies with that same standard. 77

78 C505 Change in Occupancy Spaces undergoing a change in occupancy that would result in an increase in demand for either fossil fuel or electrical energy shall comply with this code 78

79 C505 Change in Occupancy Where the use in a space changes from one to another in Tables C (1) or C (2), the installed lighting wattage shall comply with Section 405 Partial Tables 79

80 ASHRAE 90.1 Path Interior Lighting Controls Daylight Responsive Controls in Primary and Secondary Sidelight Areas General lighting in the secondary sidelighted area shall be controlled independently of the general lighting in the primary sidelighted area 80

81 ASHRAE 90.1 Path Voltage Drop Feeder conductors shall be sized for a maximum voltage drop of 2% at design load Branch circuits conductors shall be sized for a maximum voltage drop of 3% at design loads 81

82 ASHRAE 90.1 Path Automatic Receptacle Control Automatic receptacle control for 50% of receptacles in the following spaces: Private offices Conference rooms Print and copy rooms Breakrooms Classrooms Individual workstations 82

83 ASHRAE 90.1 Path Electrical Energy Monitoring Monitoring Measurement devices shall be installed in new buildings 25,000 SF to monitor the electrical use for each of the following separately: Total electrical energy HVAC systems Interior lighting Exterior lighting Receptacle circuits Recording and reporting Electric energy loads (above) shall be recorded a minimum of every 15 minutes and reported at least hourly, daily, monthly and annually. The system shall be capable of maintaining all data collected for a minimum of 36 months. 83

84 ASHRAE 90.1 Path Vertical fenestration Limited to 40% of wall Exception: Vertical fenestration that is located on the street side of the street-level story 84

85 Compliance 85

86 Compliance Issues All Commercial Building Types Lighting Mandatory manual & automatic controls critical to energy savings Lighting Power Density (LPD) calculations often done incorrectly Daylit areas to be controlled separately Daylight/Skylight provisions in both envelope and electrical sections When COMcheck is used for compliance, fixture wattage and building or space area is often improperly entered 86

87 Energy cost budget method Compare a proposed design with code compliant design Demonstrate proposed design is at least as energy efficient as the code compliant design Approach Allows great flexibility but ASHRAE 90.1 Energy Cost Budget Method Requires considerable effort Still must meet all prescriptive lighting, HVAC, and service water heating requirements selected in ASHRAE

88 Commercial Energy Code Software RESNET For residential units within a building up to 5 stories and with independent unit-level heating and cooling systems: A HERS rater verified index of 55 or less for the finished units together A completed and HERS rater verified Energy Star Thermal Enclosure Checklist Meet the IECC 2015 requirements for Fenestration (C402.4), Mechanical (C403.2), Service Water Heating (C404) and Electric Power and Lighting Systems (C405) 88 88

89 Commercial Energy Code Software RESNET Compliance based on Energy Rating Index (ERI) allows the following trade-offs for onsite renewable energy systems: Offset 5 HERS points for a solar PV array rate at 2.5 kw or higher Offset 5 HERS points for a clean biomass system, solar thermal array or geothermal heat pump, or a combination of these systems, operating as the primary heating system Offset 2 HERS point for a solar thermal array for primary domestic hot water heating or clean biomass stove Renewable Energy Source New Construction Whole House Renovations; Additions None Solar PV > 2.5 kw; Renewable primary heating system Solar PV; Renewable primary heating & solar thermal DHW Solar PV & Renewable primary heating and solar thermal DHW

90 Commercial Energy Code Software Passive House Institute US (PHIUS) Approved Software A PHIUS or another approved software by PHIUS that demonstrates the following: A specified space heat demand is less than or equal to 10 kbtu/sf/yr. Meet the IECC 2015 requirements for Fenestration (C402.4), Mechanical (C403.2), Service Water Heating (C404) and Electric Power and Lighting Systems (C405) 90

91 Commercial Energy Code Software Energy Star Homes 3.1 New residential structures, or additions to existing residential structures or portions thereof as certified to conform with the Energy Star Homes standard, Version

92 Commercial Energy Code Documentation Software COMcheck Compiles user inputs Calculates allowed envelope trade-offs Provides printable organized output Does not prove compliance Accuracy of inputs is key 92

93 Limitations of COMcheck No trade-offs between envelope, HVAC and lighting systems Not performance based software Can only use for buildings up to 40% WWR if demonstrating compliance with the IECC 93 93

94 Summary of Electrical Concepts for Increased Energy Savings Both manual and automatic lighting control requirements Use rated lamp/ballast wattage to calculate LPD LPD approach for exterior lighting Daylit areas need to be controlled separately Lighting controls must be included in system commissioning 94 94

95 Resources Designlights Consortium Qualified Products List (QPL): Advanced Lighting Guidelines (ALGonline): Daylighting Pattern Guide: patternguide.advancedbuildings.net 95

96 Codes and Standards Initiative - Sponsors