MID-RISE APARTMENT BUILDING PROTOTYPE HIGH PERFORMANCE PV Genera on Poten al 10.8 kbtu/ 2/yr

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1 MID-RISE APARTMENT BUILDING PROTOTYPE HIGH PERFORMANCE 50 kbtu/sf/yr 45.1 PROJECT INFORMATION 40 kbtu/sf/yr 30 kbtu/sf/yr 20 kbtu/sf/yr 10 kbtu/sf/yr 0 kbtu/sf/yr 13.0 kbtu/ft2/yr Baseline 10.8 kbtu/ft2/yr 13.0 High Performance 15.5 PHIUS - IES 120 mbtu 100 mbtu 80 mbtu 60 mbtu 40 mbtu 20 mbtu 0 mbtu 35000kWh 30000kWh 25000kWh 20000kWh 15000kWh 10000kWh 5000kWh 0kWh Jan Feb Mar Apr May Jun Jan Feb Mar Apr May Jun PV Genera on Poten al 10.8 kbtu/ 2/yr Jul Aug Sept Oct Nov Dec Heating Cooling DHW Lighting Equipment Fans/ Pumps 25.2 PHIUS - WUFI The mid-rise apartment building high performance prototype was developed by testing improvements on the envelope elements and different mechanical system options. The result is an improved envelope built to a higher construction standard to reduce losses due to infiltration, a high-efficiency variable refrigerant flow system, and reduced energy use for lighting and plug loads. The modeled performance is 70% better than the baseline, and has a HERS index of 38. Heating loads are dramatically reduced over conventional code construction. The primary energy uses in the building is occupant driven loads lighting and plug loads. Relative to the total, seasonal cooling demand is also evident. Jul Aug Sep Oct Nov Dec kwh Generated kwh Demand The chart above shows the annual energy production potential for for the building with a roof top photovoltaic array (left), and a comparison of monthly production and demand (right). The blue area on the pie chart is the annual production relative to the load, which shows the prototype is not net-zero energy annually, but is net positive April through September. Mid-Rise Prototype 52 Units, 2, 3BR 170 Residents 16.6 DHW 17.5 cfm/person, continuous ventilation Area Floor: 67,845 ft2 Roof: 13,673 ft2 Exterior Wall: 27,637 ft2 Opening: 7,698 ft2 WWR: 27.8 Surface Area / Volume Ratio: 0.07 Location and Climate Minneapolis, Minnesota Climate Zone 6 HDD: 8217 CDD: 831 SPECIFICATIONS Optimized Equipment VRF System Heating CoP: Cooling CoP: Natural Gas Hot Water Heater, 0.95 EF, Gal Storage 65% Efficient Energy Recovery Lighting Power Density: w/ft2 Equipment Power Density: w/ft2 Optimized Envelope Roof: R-83.3 Wall: R-48.6 Glazing: Whole Window U-0.206, SHGC 0.4 Slab: R-34 Infiltration: 0.9 ACH50 Minnesota Sustainable Housing Initiative Multi-Family Housing High Performance Prototypes 2017 Regents of the University of Minnesota, Center For Sustainable Building Research

2 MID-RISE APARTMENT BUILDING PROTOTYPE HIGH PERFORMANCE IES VE Modeling Assumptions Massing Building Area: 67,845 ft2 Number of Floors: 5 Floor To Floor Height: 9-7 Envelope Roof Insulation: R-83.3 Wall Insulation: R-48.6 Glazing U-Factor: U Glazing SHGC: 0.4 Window to Wall Ratio: Slab Insulation: R-34 Construction Tightness: 0.06 ACHnat Occupancy Number of Residents: 170 Daily Hot Water Use: 16.6 gallons per day, 120 System HVAC System: Variable Refrigerant Flow System* Cooling Efficiency: SSCOP Heating Efficiency: SCoP Heat Recovery: None Ventilation Rate (Units): cfm/person, continuous Heating Set Point: 69 Cooling Set Point: 76 Hot Water Heater Efficiency: 95% *Modeled with Daikin VRV Systems Plug-in for IES VE Internal Loads Lighting Power Density (Units): 0.19 w/ft2 Equipment Power Density (Units): 0.25 w/ft2 Intent and Modeling The intent of the building prototypes is to better understand a step progression from current practice toward low and net-zero energy construction. Neither the proposed building performance nor the baseline building performance are predictions of actual energy consumption or costs, but provide a relative comparison of the proposed design. The modeling of this prototype was done using IES Virtual Environment REM/Rate was used to generate the HERS Index based on the building on the IES model specifications. The energy production estimate assumes a flat roof with 70% 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

3 Fuel Summary Property Weather: Mid Rise High Performance Mid Rise High Performance.blg Organization Building Knowledge, Inc Patrick OMalley Builder HERS Projected Rating 12/27/17 Rater ID: Annual Energy Cost Natural gas 3176 Electric Annual End-Use Cost Heating 6387 Cooling 2371 Water Heating 3176 Lights & Appliances Photovoltaics -0 Service Charge Total Annual End-Use Consumption Heating (kwh) Cooling (kwh) Water Heating (Therms) 3529 Lights & Appliances (kwh) Total (Therms) 3529 Total (kwh) Annual Energy Demands kw Heating 85.8 Cooling 21.9 Water Heating (Winter Peak) 0.0 Water Heating (Summer Peak) 0.0 Lights & Appliances (Winter Peak) 17.9 Lights & Appliances (Summer Peak) 41.3 Total Winter Peak Total Summer Peak 63.2 Utility Rates Electricity Xcel Elec $.090 Natural Gas Xcel Energy Gas This information does not constitute any warranty of energy cost or savings Noresco, Boulder, Colorado.

4 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: 38 Efficient Home Comparison: 62% Better General Information Conditioned Area sq. ft. House Type Multi-family, whole building Conditioned Volume cubic ft. Foundation Slab Bedrooms 104 Mechanical Systems Features Heating: Air-source heat pump, Electric, 2.5 COP. Cooling: Air conditioner, Electric, 5.0 COP. Water Heating: Conventional, Natural gas, 0.95 EF, Gal. Duct Leakage to Outside NA Ventilation System Balanced: HRV, 2984 cfm, watts. Programmable Thermostat Heat=Yes; Cool=Yes Building Shell Features Ceiling Flat R-83.3 Slab R-10.0 Edge, R-32.0 Under Sealed Attic NA Exposed Floor NA Vaulted Ceiling NA Window Type U-Value: 0.206, SHGC: Above Grade Walls R-49.0 Infiltration Rate Htg: 0.90 Clg: 0.90 ACH50 Foundation Walls NA Method Blower door test Lights and Appliance Features Percent Interior Lighting Range/Oven Fuel Electric Percent Exterior Lighting Clothes Dryer Fuel Electric Refrigerator (kwh/yr) 550 Clothes Dryer EF 3.01 Dishwasher (kwh/yr) 270 Ceiling Fan (cfm/watt) 0.00 Estimated Annual Energy Cost Use MMBtu Cost Percent Heating $ % Cooling 81.7 $2182 5% Hot Water $3176 7% Lights/Appliances $ % Photovoltaics -0.0 $-0-0% Service Charges $ % Total $ % Criteria This home meets or exceeds the minimum criteria for the following: EPA ENERGY STAR Version 3 Home EPA ENERGY STAR Version 3.1 Home 2009 International Energy Conservation Code 2012 International Energy Conservation Code Building Knowledge PO Box 1376 Burnsville MN This information does not constitute any warranty of energy cost or savings Noresco, Boulder, Colorado. The Home Energy Rating Standard Disclosure for this home is available from the rating provider.

5 HERS PERFORMANCE ENERGY RATING CERTIFICATE Projected Rating: Based on Plans - Field Confirmation Required. 38 Estimated Annual Energy Cost Estimated Annual Energy Consumption ,156 Heating 2,182 3,176 Cooling Water Heating 20,206 Lights & App 0 Photovoltaics 12,480 Service Charge 44,200 Total MMBtu/yr Heating 82.0 Cooling Water Heating Lights & App 0.0 Photovoltaics Total Address House Type Multi-family, whole building Cond. Area sq. ft. Rating No. Issue Date December 28, 2017 Certification Inspected and Tested Annual Estimates* Electric(kWh): Natural gas(therms): 3529 C02 emissions(tons): 239 Annual Savings**: $65317 * Based on standard operating conditions ** Based on a HERS 130 Index Home Building Knowledge PO Box 1376 Certified Rater Patrick OMalley Rater ID Registry ID Rating Date 12/27/17 This information does not constitute any warranty of energy cost or savings Noresco, Boulder, Colorado. The Home Energy Rating Standard Disclosure for this home is available from the rating provider.