De Young Zero Net Energy Home
De Young Properties ZNE (2013)
Walls and Roof
Typical single-family residential construction, with 2x4 16oc framing, slab-on-grade foundation, and concrete roof tile. We used high-density R-15 batt insulation in the walls along with a continuous layer of R-4 rigid insulation board on the exterior.
Subslab assembly
Standard slab-on-grade concrete foundation.
Subslab R-value
0.0
Slab edge assembly
Used no slab insulation as we are in a hot climate.
Slab edge R-value
0.0
Above grade wall R-value
19.0
Flat attic assembly
Truss framed attic with furnace/air handler mounted within. 30% of duct work remained in attic, but was buried in loose-fill fiberglass blow. The remainder was run below the thermal boundary.
Flat attic R-value
60.0
Roof Assembly
Typical concrete roof tile assembly. Cool Roof concrete tile product was installed.
Windows and Doors
Window Assembly:
Monte Verde Windows: Vinyl, dual-pane, triple-layer low-E, argon gas-filled windows made by Anlin in Clovis, CA.
Average window U-factor
0.26
Solar Heat Gain Coefficient
0.21
Visible Light Transmittance
0.64
Mechanical Systems
Space cooling - Manufacturer & Model
Lennox
Space heating - Manufacturer & Model
Lennox
Domestic hot water - Manufacturer & Model
Rheem Heat Pump Water Heater
Ventilation - Manufacturer & Model
Integrated system utilizing ECM with forced-air HVAC
Lighting Manufacturer and Model
100% LED throughout. Variety of manufacturers.
Lighting Efficiency
Envelope
Air Changes per hour, ACH50
3.00 ACH50
Air Changes per hour, CFM50
De Young Properties ZNE (2013)
Walls and Roof
Typical single-family residential construction, with 2x4 16oc framing, slab-on-grade foundation, and concrete roof tile. We used high-density R-15 batt insulation in the walls along with a continuous layer of R-4 rigid insulation board on the exterior.
| Subslab assembly |
Standard slab-on-grade concrete foundation. |
|---|---|
| Subslab R-value | 0.0 |
| Slab edge assembly |
Used no slab insulation as we are in a hot climate. |
| Slab edge R-value | 0.0 |
| Above grade wall R-value | 19.0 |
| Flat attic assembly |
Truss framed attic with furnace/air handler mounted within. 30% of duct work remained in attic, but was buried in loose-fill fiberglass blow. The remainder was run below the thermal boundary. |
| Flat attic R-value | 60.0 |
| Roof Assembly |
Typical concrete roof tile assembly. Cool Roof concrete tile product was installed. |
Windows and Doors
Window Assembly:
Monte Verde Windows: Vinyl, dual-pane, triple-layer low-E, argon gas-filled windows made by Anlin in Clovis, CA.
| Average window U-factor | 0.26 |
|---|---|
| Solar Heat Gain Coefficient | 0.21 |
| Visible Light Transmittance | 0.64 |
Mechanical Systems
| Space cooling - Manufacturer & Model | Lennox |
|---|---|
| Space heating - Manufacturer & Model | Lennox |
| Domestic hot water - Manufacturer & Model | Rheem Heat Pump Water Heater |
| Ventilation - Manufacturer & Model | Integrated system utilizing ECM with forced-air HVAC |
| Lighting Manufacturer and Model | 100% LED throughout. Variety of manufacturers. |
| Lighting Efficiency |
Envelope
| Air Changes per hour, ACH50 | 3.00 ACH50 |
|---|---|
| Air Changes per hour, CFM50 |