"Homeowners will send us their electric bills because they didn’t expect them to be that low."
Builder
Key Features
- Walls: 2x6, 16" o.c., R-21 total: advance framed; R-21 open-cell spray foam in cavity, house wrap, exterior lath, stucco.
- Roof: Truss gabled roof: ¾" plywood, synthetic underlayment, asphalt shingles.
- Attic: Unvented attic: 7" R-30 open-cell spray foam on underside of roof deck.
- Foundation: Slab on grade.
- Windows: Double-pane, argon-filled, low-e2, vinyl frame, U=0.29, SHGC=0.23.
- Air Sealing: 0.63 ACH50, open-cell spray foam in walls and attic. Aerosol whole-house sealant.
- Ventilation: ERV w/MERV 12 filter. Exhaust fans in baths and laundry, master bath fan has humidity sensor. MERV 8 filters in returns in hall and bedrooms. 16 SRE, 73 CFM, 52 Watts.
- HVAC: Central air-source heat pump, 9.6 HSPF, 17 SEER, two-stage compressor.
- Hot Water: Heat pump, 50-gal, 3.42 EF.
- Lighting: 100% LED.
- Appliances: ENERGY STAR refrigerator, dishwasher, exhaust fan.
- Solar: 1.9-kW PV, 10-kWh battery storage, rooftop panels.
- Water Conservation: Low-flow fixtures, central manifold PEX piping, recirculation pump, drip and predictive irrigation, stormwater management practices.
- Energy Management System: PV tracking, battery usage timed to avoid peak rates.
- Other: EV charging, low/no-VOC cabinets, carpets, flooring, paints, caulks, glues. In-duct hydrogen-peroxide air purifier.
Building Specifications
| Conditioned Area |
1,872
ft2
|
| Bedrooms |
2
|
| Bathrooms |
2
|
| Stories |
1
|
| Climate Zone |
4B
|
| Completion Date |
June 2020
|
Modeled Performance
| |
With PV
|
No PV
|
| HERS Index |
34
|
45
|
| Annual Energy Cost |
$950.00
|
$1,300.00
|
| Annual Energy Cost Savings |
$1,400.00
|
$1,000.00
|
| Annual Energy Savings |
11,100 kWh
|
8,200 kWh
|
| First 30 Years Savings |
$55,900.00
|
$41,200.00
|