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
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 |