A partnership between the Zero Energy Modular Affordable Housing Initiative and Habitat for Humanity

Walls and Roof

Exterior air barrier and superinsulation. Insulated floor, R-40, over sealed crawlspace.

Subslab assembly

n/a - Insulated R-40 floor over unvented crawl

Above grade wall assembly

Above grade walls are 2x4 double stud, 24 o.c., blown fiberglass.
Frame floors over an unvented crawl space are 9.25" TJI, 16" o.c., blown fiberglass with an R-value of 40.

Above grade wall R-value 43.0
Roof Assembly

Roof assembly is constructed with 11.25" Neopor SIP's with an R-value of 59.

Roof R-value 59.0

Windows and Doors

Door Assembly:

One 1/4 lite 24 sf door with a U-factor of 0.19 and one 1/2 lite 26 sf door with a U-factor of 0.23.

Average window U-factor 0.19
Solar Heat Gain Coefficient 0.20
Door U-Factor 0.21
Door Area 52 sq ft

Mechanical Systems

Space cooling - Manufacturer & Model Mitsubishi ductless Air Source Heat Pump Model # MUZ-12NAH, A CERV ventilation unit provides supplemental heating/cooling’
Space cooling - capacity 12 kW
Space heating - Manufacturer & Model Mitsubishi ductless Air Source Heat Pump Model # MUZ-12NAH, A CERV ventilation unit provides supplemental heating/cooling
Space heating - capacity 8 kW
Domestic hot water - Manufacturer & Model Heat Pump Water Heater, Rheem Model #PROPH50T2RH350 D
Domestic hot water - capacity 50 gal
Domestic hot water - efficiency 4 kW
Ventilation - Manufacturer & Model Build Equinox CERV2
Lighting Manufacturer and Model LED
Lighting Efficiency
Mechanical Equipment Installation Details and Comments

Point source heating and cooling with fully distributed balanced ventilation. Ductwork is installed in a sealed chase within the pressure boundary of the building.

Envelope

Air Changes per hour, ACH50 0.56 ACH50
Air Changes per hour, CFM50 91.00