"It feels right to think of and take care of future generations."
Homeowner
Key Features
- Walls: 2x4, 16" o.c., R-24 total: advanced framed, R-10 rigid foam strips attached to interior stud faces and capped with 1/2" plywood strips, 6" blown-in fiberglass in cavity, weather-resistant barrier, horizontal furring strips, vertical Douglas Fir siding.
- Roof: Rafter gabled roof: structural sheathing, standing seam metal roofing.
- Attic: Vented vaulted ceiling: 11" R-44 blown-in fiberglass vent baffles, raised heel trusses.
- Foundation: Slab on grade: R-10 rigid XPS under slab and at slab edge.
- Windows: Double-pane, argon-filled, low-e2, fiberglass frame, U=0.27, SHGC=0.24.
- Air Sealing: 1.9 ACH50, sealed all wall penetrations with canned foam before drywalling; used depressurization fan to find leaks; sill seal at plate, baffles sealed to top plates.
- Ventilation: Exhaust-only, low-speed continuous with boost for spot ventilation.
- HVAC: Ductless mini-split heat pump, 12.8 HSPF, 24.6 SEER, electric baseboard.
- Hot Water: Heat pump water heater, 50-gal, 3.39 EF.
- Lighting: 100% LED.
- Appliances: ENERGY STAR refrigerator, stacking clothes washer and dryer.
- Solar: 3.5-kW in community solar system.
- Water Conservation: Low-flow fixtures, compact plumbing, stormwater management.
- Energy Management System: N/A
- Other: EV charging. Accessible entries, bedroom, bathroom. Low/no-VOC paints, stains, adhesives, caulks, finishes; no composite wood in trim, formaldehyde-free cabinets.
Building Specifications
| Conditioned Area |
561
ft2
|
| Bedrooms |
2
|
| Bathrooms |
1
|
| Stories |
1
|
| Climate Zone |
4C
|
| Completion Date |
February 2019
|
Modeled Performance
| |
With PV
|
No PV
|
| HERS Index |
0
|
52
|
| Annual Energy Cost |
$200.00
|
$650.00
|
| Annual Energy Cost Savings |
$450.00
|
$250.00
|
| Annual Energy Savings |
8,200 kWh
|
4,200 kWh
|
| First 30 Years Savings |
$18,300.00
|
$9,500.00
|