Charlotte VT House
Walls and Roof
The house was conventionally framed with 2 x 6 studs with closed cell spray foam, with rigid insulation on the exterior, creating a thermal bridge free wall system. Air barrier on the exterior. All plates and double studs caulked. Roof -2x12 rafters filled with closed cell spray foam
| Subslab assembly |
4" of EPS wrapped up to isolate 4" conc slab |
|---|---|
| Subslab R-value | 20.0 |
| Slab edge assembly |
2" EPS |
| Slab edge R-value | 10.0 |
| Foundation wall assembly |
From exterior to interior - 8" of concrete, 2" of EPS 2x4 dense pack cellulose |
| Foundation wall R-value | 22.0 |
| Above grade wall assembly |
2 x 6 studs with closed cell foam with 1.5" of continuous rigid insulation on the exterior. |
| Above grade wall R-value | 42.0 |
| Cathedral ceiling assembly |
Attic 2x12 rafters filled with closed cell foam |
| Cathedral ceiling R-value | 67.0 |
| Roof R-value | 60.0 |
Windows and Doors
Window Assembly:
Thermotech fiberglass windows
Door Assembly:
Thermatru doors fiberglass.
| Average window U-factor | 0.17 |
|---|---|
| Solar Heat Gain Coefficient | 0.65 |
| Visible Light Transmittance | 0.45 |
| Door Area | 60 sq ft |
Mechanical Systems
| Space heating - Manufacturer & Model | Econar ground source heat pump |
|---|---|
| Space heating - capacity | 10,000 kW |
| Domestic hot water - Manufacturer & Model | Econar ground source heat pump |
| Domestic hot water - capacity | 80 gal |
| Ventilation - Manufacturer & Model | Venmar |
| Lighting Manufacturer and Model | All CFL as they burn out switching to LED |
| Lighting Efficiency | |
| Mechanical Equipment Installation Details and Comments |
System was designed by an engineer, third party tested. HRV was tested with Flow hood, blower door was performed. |
Envelope
| Air Changes per hour, ACH50 | 1.00 ACH50 |
|---|---|
| Air Changes per hour, CFM50 | 600.00 |