"Elements like triple pane windows and balanced ventilation systems—these are simply included as standard."
Builder
Key Features
- Walls: 2x6, 16" o.c., R-23: 5.5" R-23 blown fiberglass, 1/2" plywood sheathing, heavy membrane with taped seams, 1/2" furring strips, fiber cement lap siding.
- Roof: Truss gable roof: scissor truss, 5/8" plywood sheathing with taped seams, 4" R-20 graphite EPS rigid foam in two layers with staggered seams, 1/2" plywood, asphalt shingles.
- Attic: Unvented (hot roof): 5.5" R-23 blown-in fiberglass in truss top chord.
- Foundation: Uninsulated above-grade garage on pre-existing slab foundation. Floor above garage is 11-7/8" truss I joist with R-48 blown-in fiberglass.
- Windows: Triple-pane, argon-filled, low-e, vinyl frame, U=0.16-0.20, SHGC=0.22-0.27.
- Air Sealing: 0.94 ACH50, house wrap seams taped, roof deck seams taped, unvented attic, subfloor seams caulked; whole-house aerosol sealant before insulating.
- Ventilation: ERV, bath fan boost, MERV 15 filter, 116 SRE, 119 ASRE.
- HVAC: Heat pump, AC variable speed compressor, 14.1 SEER, compact duct design.
- Hot Water: Heat pump water heater, 50-gal, 3.75 UEF.
- Lighting: 100% LED, dimmers, clerestory window.
- Appliances: ENERGY STAR clothes washer, dishwasher, refrigerator.
- Solar: 5.85 kW, 18 325-W rooftop panels.
- Water Conservation: Low-flow fixtures; compact PEX plumbing, stormwater management.
- Energy Management System: Web-based PV monitoring; ERV has temp/humidity sensors.
- Other: Electric vehicle charging station, CARB 2 cabinetry, low-VOC paints, formaldehydefree insulation, pre-finished GreenGuard Gold certified cork flooring, FSC-certified lumber.
Building Specifications
| Conditioned Area |
500
ft2
|
| Bedrooms |
1
|
| Bathrooms |
1
|
| Stories |
2
|
| Climate Zone |
4C
|
| Completion Date |
November 2020
|
Modeled Performance
| |
With PV
|
No PV
|
| HERS Index |
-20
|
55
|
| Annual Energy Cost |
($100.00)
|
$550.00
|
| Annual Energy Cost Savings |
$1,150.00
|
$400.00
|
| Annual Energy Savings |
9,700 kWh
|
3,300 kWh
|
| First 30 Years Savings |
$47,400.00
|
$16,000.00
|