Sandywoods Farm Net Zero Spec House #1
Lot 8 Sandywoods Farm Net Zero
Walls and Roof
R-60 SIP Roof, R-40 double stud open cell spray foam walls, R-20 closed cell spray foam under slab and covering entire surface of interior of concrete basement walls. R-40 open cell spray foam in rim joist. Triple glazed R-5 windows and doors.
Subslab assembly
R20 closed cell spray foam sprayed on top of 3/4 stone under concrete basement floor slab.
Subslab R-value
20.0
Slab edge assembly
before the slab is poured the closed cell spray foam is sprayed on the stone and up the interior of the foundation walls. Therefore the slab is completely insulated from the outside.
Slab edge R-value
20.0
Foundation wall assembly
closed cell foam sprayed to R20 on inside of foundation walls
Foundation wall R-value
20.0
Above grade wall assembly
12" double stud walls filled with open cell spray foam insulation.
Above grade wall R-value
40.0
Flat attic assembly
No flat attic. Cathedral SIP roof
Cathedral ceiling assembly
16" thick EPS SIP Panel Roof
Cathedral ceiling R-value
60.0
Roof Assembly
16" thick EPS SIP Panel Roof
Roof R-value
60.0
Windows and Doors
Window Assembly:
vinyl new construction triple glazed, low-e, krypton gas filled double hung windows from Harvey Tribute Line
Door Assembly:
Sliding glass door is from same Harvey Tribute line with same spec's as windows. Entry doors are Therma-Tru Classic Craft models
Average window U-factor
0.20
Solar Heat Gain Coefficient
0.22
Visible Light Transmittance
0.32
Door U-Factor
0.20
Door Area
80 sq ft
Mechanical Systems
Space cooling - Manufacturer & Model
Fujitsu XLTH
Space cooling - capacity
24 kW
Space heating - Manufacturer & Model
Fujitsu XLTH
Space heating - capacity
32 kW
Domestic hot water - Manufacturer & Model
GE Geospring Heat Pump Hot water Heater
Domestic hot water - capacity
60 gal
Domestic hot water - efficiency
225 kW
Ventilation - Manufacturer & Model
Panasonic FV 05 11VKSL1
Lighting Manufacturer and Model
LED screw in
Lighting Efficiency
LED
Mechanical Equipment Installation Details and Comments
blower door testing will be done at end of construction. All ducting is within the conditioned space.
Envelope
Air Changes per hour, ACH50
1.00 ACH50
Air Changes per hour, CFM50
Walls and Roof
R-60 SIP Roof, R-40 double stud open cell spray foam walls, R-20 closed cell spray foam under slab and covering entire surface of interior of concrete basement walls. R-40 open cell spray foam in rim joist. Triple glazed R-5 windows and doors.
| Subslab assembly |
R20 closed cell spray foam sprayed on top of 3/4 stone under concrete basement floor slab. |
|---|---|
| Subslab R-value | 20.0 |
| Slab edge assembly |
before the slab is poured the closed cell spray foam is sprayed on the stone and up the interior of the foundation walls. Therefore the slab is completely insulated from the outside. |
| Slab edge R-value | 20.0 |
| Foundation wall assembly |
closed cell foam sprayed to R20 on inside of foundation walls |
| Foundation wall R-value | 20.0 |
| Above grade wall assembly |
12" double stud walls filled with open cell spray foam insulation. |
| Above grade wall R-value | 40.0 |
| Flat attic assembly |
No flat attic. Cathedral SIP roof |
| Cathedral ceiling assembly |
16" thick EPS SIP Panel Roof |
| Cathedral ceiling R-value | 60.0 |
| Roof Assembly |
16" thick EPS SIP Panel Roof |
| Roof R-value | 60.0 |
Windows and Doors
Window Assembly:
vinyl new construction triple glazed, low-e, krypton gas filled double hung windows from Harvey Tribute Line
Door Assembly:
Sliding glass door is from same Harvey Tribute line with same spec's as windows. Entry doors are Therma-Tru Classic Craft models
| Average window U-factor | 0.20 |
|---|---|
| Solar Heat Gain Coefficient | 0.22 |
| Visible Light Transmittance | 0.32 |
| Door U-Factor | 0.20 |
| Door Area | 80 sq ft |
Mechanical Systems
| Space cooling - Manufacturer & Model | Fujitsu XLTH |
|---|---|
| Space cooling - capacity | 24 kW |
| Space heating - Manufacturer & Model | Fujitsu XLTH |
| Space heating - capacity | 32 kW |
| Domestic hot water - Manufacturer & Model | GE Geospring Heat Pump Hot water Heater |
| Domestic hot water - capacity | 60 gal |
| Domestic hot water - efficiency | 225 kW |
| Ventilation - Manufacturer & Model | Panasonic FV 05 11VKSL1 |
| Lighting Manufacturer and Model | LED screw in |
| Lighting Efficiency | LED |
| Mechanical Equipment Installation Details and Comments |
blower door testing will be done at end of construction. All ducting is within the conditioned space. |
Envelope
| Air Changes per hour, ACH50 | 1.00 ACH50 |
|---|---|
| Air Changes per hour, CFM50 |