Afton VA Near Zero Energy Home
Mountain Views and low impact
Walls and Roof
2x6 timber stud walls on 16 centers, 7/16 OSB sheathing and Tyvex wrapped. Tight insulation as described below
Above grade wall assembly
2x6 timber stud walls on 16 centers, 7/16 OSB sheathing and Tyvek wrapped. R-21 dense pack cellulose insulation full cavity, Joist ends and bands foamed.
Above grade wall R-value
21.0
Flat attic assembly
blown in cellulose insulation in flat attic surfaces
Flat attic R-value
49.0
Cathedral ceiling assembly
Fiberglass batt insulation in cathedral ceiling spaces
Cathedral ceiling R-value
38.0
Roof Assembly
30 # felt under asphalt architectural shingles. Continuous Soffit vents at eaves with ridge vent on shingles, Blown in cellulose on flat ceiling surfaces as noted above
Windows and Doors
Window Assembly:
Jeld-Wen Energy Star Rated windows
Average window U-factor
0.23
Solar Heat Gain Coefficient
0.28
Visible Light Transmittance
0.52
Mechanical Systems
Space cooling - Manufacturer & Model
Water Furance Series 5 NDH049
Space cooling - capacity
15 kW
Space heating - Manufacturer & Model
Water Furance Series 5
Space heating - capacity
11 kW
Lighting Manufacturer and Model
LED Lighting throughout
Lighting Efficiency
Mountain Views and low impact
Walls and Roof
2x6 timber stud walls on 16 centers, 7/16 OSB sheathing and Tyvex wrapped. Tight insulation as described below
| Above grade wall assembly |
2x6 timber stud walls on 16 centers, 7/16 OSB sheathing and Tyvek wrapped. R-21 dense pack cellulose insulation full cavity, Joist ends and bands foamed. |
|---|---|
| Above grade wall R-value | 21.0 |
| Flat attic assembly |
blown in cellulose insulation in flat attic surfaces |
| Flat attic R-value | 49.0 |
| Cathedral ceiling assembly |
Fiberglass batt insulation in cathedral ceiling spaces |
| Cathedral ceiling R-value | 38.0 |
| Roof Assembly |
30 # felt under asphalt architectural shingles. Continuous Soffit vents at eaves with ridge vent on shingles, Blown in cellulose on flat ceiling surfaces as noted above |
Windows and Doors
Window Assembly:
Jeld-Wen Energy Star Rated windows
| Average window U-factor | 0.23 |
|---|---|
| Solar Heat Gain Coefficient | 0.28 |
| Visible Light Transmittance | 0.52 |
Mechanical Systems
| Space cooling - Manufacturer & Model | Water Furance Series 5 NDH049 |
|---|---|
| Space cooling - capacity | 15 kW |
| Space heating - Manufacturer & Model | Water Furance Series 5 |
| Space heating - capacity | 11 kW |
| Lighting Manufacturer and Model | LED Lighting throughout |
| Lighting Efficiency |