Mechanic Street Passive House
An Affordable, Replicable Passive House
Walls and Roof
This project was designed to meet the PHIUS+ standards, with a robust thermal envelope and simple shape for affordability and constructability.
| Subslab assembly |
Exposed concrete slab with 6" EPS. |
|---|---|
| Subslab R-value | 25.2 |
| Slab edge R-value | 16.8 |
| Above grade wall assembly |
Double Stud wall. 2x6 outer, 3" gap, 2x4 inner. 4" closed cell foam Lapolla Foam Lok 2000-4g, 8" blown in fiberglass. |
| Above grade wall R-value | 56.0 |
| Roof Assembly |
Truss filled with 24" blown in cellulose. |
| Roof R-value | 91.7 |
Windows and Doors
Window Assembly:
Schuco PVCU, Triple glazed
Door Assembly:
Schuco
| Average window U-factor | 0.13 |
|---|---|
| Solar Heat Gain Coefficient | 0.50 |
Mechanical Systems
| Space cooling - Manufacturer & Model | Daiken Quaternity FTXG12HVJU indoor & RXG12HVJU outdoor |
|---|---|
| Space heating - Manufacturer & Model | Daiken Quaternity FTXG12HVJU indoor & RXG12HVJU outdoor |
| Domestic hot water - Manufacturer & Model | GE Geospring Heat Pump Hot Water Heater |
| Domestic hot water - capacity | 80 gal |
| Ventilation - Manufacturer & Model | Zehnder ERV ComfoAir 350 |
| Lighting Manufacturer and Model | |
| Lighting Efficiency |
Envelope
| Air Changes per hour, ACH50 | 0.02 ACH50 |
|---|---|
| Air Changes per hour, CFM50 |