Two Zero Energy Modular Homes in Northampton
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. |
| 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 |