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Multi-Family Residential
New Construction
2,200 SF
Philadelphia: Brewerytown

This two-unit, all electric building represents a balance between development cost and high-performance certification. Throughout the design process, simple detailing focused on replicability. The building is an efficient box with no projections or added appendages to reduce complexity and construction cost. Assemblies utilize common membranes and insulation to achieve a super-insulated, air-tight building. The project’s energy profile is optimized through the Department of Energy’s Zero Energy Ready Homes program, the first multi-family building in Philadelphia to attain this certification. 



U.S. Department of Energy (DOE) Zero Energy Ready Home Certification

Building Metrics

Predicted Energy Use Intensity (pEUI): 18.32 kBtu/sf/yr

Home Energy Rating Score (HERS Index): 38 (unit 1); 37 (Unit 2)

Airtightness: 0.27 ACH 50

Building Envelope

Slab On Grade: R-16

Below Grade Walls: R-15

Above Grade Walls: R-31

Roof: R-50


Building Systems

Power/Fuel Source(s): All electric

Heating & Cooling: Ductless mini-split heat pumps

Ventilation: Energy recovery ventilator

Hot Water: Heat-pump water heater

Appliances: Energy-Star

LED lighting

Solar ready


Dave Apple

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