Midtown Passive House
Walls and Roof
Building envelope was designed to the Passive House Standard
| Subslab assembly |
4" XPS 4" gravel 10 mil. vapor retarder |
|---|---|
| Subslab R-value | 21.3 |
| Slab edge assembly |
4" XPS |
| Slab edge R-value | 21.3 |
| Foundation wall assembly |
From exterior to interior - 1.5" XPS 8" concrete 2" XPS 7.5" blown in cellulose 2 x 4 wood stud with 5/8 drywall |
| Foundation wall R-value | 46.3 |
| Above grade wall assembly |
From exterior to interior - 1" XPS 1/2" OSB 2.5" Spray Foam 2 x 6 staggered stud @ 24" O.C. 8.5" cellulose 2 x 4 staggered stud at 24" O.C. 5/8" drywall |
| Above grade wall R-value | 47.5 |
| Roof Assembly |
wood roof trusses at 24" o.c. |
| Roof R-value | 54.6 |
Windows and Doors
Window Assembly:
Alpen 925 Series Fiberglass Low E
Door Assembly:
Therma Tru Insulated Frame
| Average window U-factor | 0.12 |
|---|---|
| Solar Heat Gain Coefficient | 0.28 |
| Door U-Factor | 0.90 |
| Door Area | 20 sq ft |
Mechanical Systems
| Space cooling - Manufacturer & Model | Fist Co Evaporator Coil |
|---|---|
| Space heating - Manufacturer & Model | First Co. Hydronic Fan Coil |
| Domestic hot water - Manufacturer & Model | Navien Condensing Combi Gas Boiler |
| Ventilation - Manufacturer & Model | Zehnder Comfo Air 350 ERV |
| Lighting Manufacturer and Model | |
| Lighting Efficiency |
Envelope
| Air Changes per hour, ACH50 | 0.60 ACH50 |
|---|---|
| Air Changes per hour, CFM50 |