TOWNHOME PROTOTYPE BASELINE 60 kbtu/sf/yr 50 kbtu/sf/yr 40 kbtu/sf/yr 30 kbtu/sf/yr 20 kbtu/sf/yr 10 kbtu/sf/yr 0 kbtu/sf/yr 54.4 Baseline 54.4 kbtu/ 2/yr 21.8 High Performance 18.2 PHIUS - IES 60 MMBtu 50 MMBtu 40 MMBtu 30 MMBtu 20 MMBtu 10 MMBtu 0 MMBtu PHIUS - WUFI Jan Feb Mar Apr May PV Generation Potential 17.1 kbtu/ft2/yr The baseline building meets the building code (2015 Minnesota Residential Code) minimum requirements for envelope assemblies and Energy Star requirements for mechanical equipment. This building performs more efficiently than a typical baseline or worst-case scenario, due to the increasingly aggressive building codes being adopted in Minnesota. As modeled the building achieves a HERS index of 60. Jun Jul Aug Sept Oct Nov Dec Hea ng Cooling DHW Ligh ng Equipment Fans/ Pumps The charts above shows energy use in the building by end use. The heating energy (red) is the majority of the load. Heating conservation strategies for this envelope dominated building type should focus on increased insulation, air sealing, and a more efficient mechanical system. 15.4 PROJECT INFORMATION Townhome Prototype 4 Units, 2BR each 12 Residents 16.6 DHW gpd/person@120f 15.9 cfm/person, continuous ventilation Area Floor: 5,124 ft2 Roof: 2,562 ft2 Exterior Wall: 4,957 ft2 Opening: 638 ft2 WWR: 12.9 Surface Area / Volume Ratio: 0.18 Location and Climate Minneapolis, Minnesota Climate Zone 6 HDD: 8217 CDD: 831 SPECIFICATIONS Baseline Equipment Gas Furnace, 95.0 AFUE Electric AC, 14.0 SEER Natural Gas Hot Water Heater, 0.67 EF, 40.0 Gal Storage Lighting Power Density: 0.6 w/ft2 Equipment Power Density: 0.25 w/ft2 17.1 kbtu/ 2/yr 15000kWh 11250kWh 7500kWh 3750kWh 0kWh Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Baseline Envelope Roof: R-50 Wall: R-16 Glazing: Whole Window U-0.32, SHGC 0.26 Slab: R-10 Infiltration: 3.0 ACH50 kwh Generated kwh Demand The chart above shows the annual energy production potential for the townhomes for a roof top photovoltaic array (left), and a comparison of monthly production and demand (right). The blue area on the pie chart shows the annual production relative to total load, which shows that 31% of the annual energy load can be met on site. Minnesota Sustainable Housing Initiative Multi-Family Housing High Performance Prototypes 2017 Regents of the University of Minnesota, Center For Sustainable Building Research
TOWNHOME PROTOTYPE BASELINE IES VE Modeling Assumptions Massing Building Area: 5,124 ft2 Number of Floors: 2 Floor To Floor Height: 9-3-3/8 Envelope Roof Insulation: R-50 Wall Insulation: R-16 Glazing U-Factor: U-0.32 Glazing SHGC: 0.26 Window to Wall Ratio: 0.124 Slab Insulation: R-10 Construction Tightness: 0.33 ACHnat Occupancy Number of Residents: 12 Daily Hot Water Use: 16.6 gallons per day, 120 System HVAC System: Gas Furnace, Electric Air Conditioning Cooling Efficiency: 14.0 SSCOP Heating Efficiency: 0.95 SCoP Heat Recovery: 60% Efficient, Thermal Wheel Ventilation Rate (Units): 7.7620 cfm/person, continuous Heating Set Point: 69 Cooling Set Point: 76 Hot Water Heater Efficiency: 67% Internal Loads Lighting Power Density (Units): 0.60 w/ft2 Equipment Power Density (Units): 0.25 w/ft2 Modeling Disclaimer Neither the proposed building performance nor the baseline building performance are predictions of actual energy consumption or costs for the proposed design after construction. Actual experience will differ from these calculations due to variations such as occupancy, building operation and maintenance, weather, energy use not covered by this procedure, changes in energy rates between design of the building and occupancy, and the precision of the calculation tool. Modeled using IES Virtual Environment 2015. Energy production assumes a ptiched roof with 50% of the tool roof area dedicated to PV panels. Minnesota Sustainable Housing Initiative Multi-Family Housing High Performance Prototypes 2017 Regents of the University of Minnesota, Center For Sustainable Building Research
Fuel Summary Property Weather: Townhome Baseline Townhome Baseline.blg Organization Building Knowledge, Inc. 952-944-5605 Patrick OMalley Builder HERS Projected Rating 12/27/17 Rater ID:9377462 Annual Energy Cost Natural gas 1886 Electric 1771 Annual End-Use Cost Heating 1324 Cooling 221 Water Heating 462 Lights & Appliances 1650 Photovoltaics -0 Service Charge 960 Total 4617 Annual End-Use Consumption Heating (Therms) 1354 Heating (kwh) 1178 Cooling (kwh) 2424 Water Heating (Therms) 514 Lights & Appliances (Therms) 231 Lights & Appliances (kwh) 15781 Total (Therms) 2099 Total (kwh) 19382 Annual Energy Demands kw Heating 0.4 Cooling 3.1 Water Heating (Winter Peak) 0.0 Water Heating (Summer Peak) 0.0 Lights & Appliances (Winter Peak) 1.4 Lights & Appliances (Summer Peak) 2.9 Total Winter Peak 1.8 Total Summer Peak 6.0 Utility Rates Electricity Xcel Elec $.090 Natural Gas Xcel Energy Gas This information does not constitute any warranty of energy cost or savings. 1985-2016 Noresco, Boulder, Colorado.
Property Home Energy Rating Certificate HERS Rating Type: Projected Rating Certified Energy Rater: Patrick OMalley Rating Date: 12/27/17 Rating Number: Registry ID: Projected Rating: Based on Plans - Field Confirmation Required. HERS Index: 60 Efficient Home Comparison: 40% Better General Information Conditioned Area 5124 sq. ft. House Type Multi-family, whole building Conditioned Volume 50215 cubic ft. Foundation Slab Bedrooms 8 Mechanical Systems Features Heating: Fuel-fired air distribution, Natural gas, 95.0 AFUE. Cooling: Air conditioner, Electric, 14.0 SEER. Water Heating: Conventional, Natural gas, 0.67 EF, 40.0 Gal. Duct Leakage to Outside 100.00 CFM25. Ventilation System Balanced: HRV, 191 cfm, 54.0 watts. Programmable Thermostat Heat=Yes; Cool=Yes Estimated Annual Energy Cost Use MMBtu Cost Percent Heating 136.5 $1298 28% Cooling 7.1 $190 4% Hot Water 51.3 $462 10% Lights/Appliances 77.2 $1657 36% Photovoltaics -0.0 $-0-0% Service Charges $960 21% Total 272.2 $4567 100% Criteria This home meets or exceeds the minimum criteria for the following: 2009 International Energy Conservation Code Building Shell Features Ceiling Flat R-50.0 Slab R-10.0 Edge, R-0.0 Under Sealed Attic NA Exposed Floor NA Vaulted Ceiling NA Window Type U-Value: 0.320, SHGC: 0.260 Above Grade Walls R-18.0 Infiltration Rate Htg: 3.00 Clg: 3.00 ACH50 Foundation Walls NA Method Blower door test Lights and Appliance Features Percent Interior Lighting 50.00 Range/Oven Fuel Natural gas Percent Exterior Lighting 50.00 Clothes Dryer Fuel Natural gas Refrigerator (kwh/yr) 653 Clothes Dryer EF 2.67 Dishwasher (kwh/yr) 270 Ceiling Fan (cfm/watt) 0.00 Building Knowledge PO Box 1376 Burnsville MN 55337 952-944-5605 www.buildingknowledge.com This information does not constitute any warranty of energy cost or savings. 1985-2016 Noresco, Boulder, Colorado. The Home Energy Rating Standard Disclosure for this home is available from the rating provider.
HERS PERFORMANCE ENERGY RATING CERTIFICATE 60 Projected Rating: Based on Plans - Field Confirmation Required. Estimated Annual Energy Cost Estimated Annual Energy Consumption 5000 4000 3000 2000 1000 0 1,298 1,657 190 462 Heating Cooling Water Heating Lights & App 0 Photovoltaics 960 Service Charge 4,567 Total MMBtu/yr 300.0 250.0 200.0 150.0 100.0 50.0 0.0 137.0 Heating 7.0 Cooling 51.0 Water Heating 77.0 Lights & App 0.0 Photovoltaics 272.0 Total Address House Type Multi-family, whole building Cond. Area 5124 sq. ft. Rating No. Issue Date December 28, 2017 Certification Inspected and Tested Annual Estimates* Electric(kWh): 19128 Natural gas(therms): 2069 C02 emissions(tons): 26 Annual Savings**: $3544 * Based on standard operating conditions ** Based on a HERS 130 Index Home Building Knowledge PO Box 1376 Certified Rater Patrick OMalley Rater ID 9377462 Registry ID Rating Date 12/27/17 This information does not constitute any warranty of energy cost or savings. 1985-2016 Noresco, Boulder, Colorado. The Home Energy Rating Standard Disclosure for this home is available from the rating provider.