"I have a lot of allergies…, and this year I haven’t had to take a single pill."
Homeowner
Key Features
- Walls: 2x6, 24" o.c., R-26 total: advanced framed; dense-packed cellulose in cavity, 1/2" CDX plywood with all nails, joints, and holes taped. 2" cork, weather resistant barrier, 1x vertical + 1x horizontal battens, 1.25" Juniper open-joint cladding.
- Roof: Gable roof: 16" parallel cord trusses dense-packed with cellulose, topped with taped membrane, 2x battens for air gap, 1/2" plywood sheathing, self-adhered membrane, standing seam metal roof. Flat roof: 2x10 rafters dense-packed with cellulose, 1/2" plywood sheathing taped, R-12 tapered polyisocyanurate foam board, TPO membrane.
- Attic: No attic, cathedral ceilings, hot roof.
- Foundation: Vented crawl space. Floor joists have 16" R-43 dense-packed cellulose.
- Windows: Triple-pane, argon-filled, low-e2, fiberglass frame; U=0.15, SHGC=0.43.
- Air Sealing: 0.88 ACH50, roof membrane taped to wall sheathing; all seams taped.
- Ventilation: HRV, ERV in ADU, MERV 13 filters, boost switches in bathrooms.
- HVAC: Central heat pump, 12.2 HSPF, 17.7 SEER, AC variable-speed compressor.
- Hot Water: Heat pump, 2.90 EF, 80-gal, compact plumbing design, recirculation pump.
- Lighting: 100% LED.
- Appliances: ENERGY STAR refrigerators, dishwashers, clothes washers, ventless HP dryers.
- Solar: 6.38-kW rooftop panels.
- Water Conservation: Low-flow fixtures, PEX piping, compact plumbing.
- Energy Management System: N/A
- Other: Accessible ramp, kitchen, shower. Low-VOC flooring, cabinetry, paint.
Building Specifications
| Conditioned Area |
1,741
ft2
|
| Bedrooms |
3
|
| Bathrooms |
2.5
|
| Stories |
2
|
| Climate Zone |
4C
|
| Completion Date |
January 2021
|
Modeled Performance
| |
With PV
|
No PV
|
| HERS Index |
0
|
35
|
| Annual Energy Cost |
$100.00
|
$500.00
|
| Annual Energy Cost Savings |
$1,000.00
|
$600.00
|
| Annual Energy Savings |
12,800 kWh
|
7,300 kWh
|
| First 30 Years Savings |
$41,500.00
|
$23,700.00
|