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.
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
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 |