"It's so quiet inside, we barely hear any exterior sounds."
Homeowner
Key Features
- Walls: SIPs, R-30: 6.5" graphite SIP panel (R-29), house wrap, fiber cement.
- Roof: SIP gable roof: 10.25" R-49 graphite-EPS SIPs, asphalt composite roofing.
- Attic: No attic, vaulted ceilings.
- Foundation: R-23.6 Slab on grade: 11.25" ICF stem walls.
- Windows: Triple-pane, argon-filled, low-e3, vinyl frame, U=0.15-0.22, SHGC=0.27-0.46.
- Air Sealing: 0.47 ACH50, all SIP joints taped and sealed with double-bead mastic tape. Whole-house aerosol sealant.
- Ventilation: HRV, HEPA filter, CO2 sensor, 88 SRE, 110 CFM, 32 Watts.
- HVAC: Air-to-water heat pump with 50% central air handler, 50% radiant, 3.92 COP, AC variable speed compressor, 23.02 EER.
- Hot Water: Combi air-to-water heat pump for space and water heating, 50-gal, 3.92 COP, electric tankless back-up water heater.
- Lighting: 100% LED.
- Appliances: ENERGY STAR refrigerator, dishwasher, clothes washer.
- Solar: 12.87 kW, rooftop panels.
- Water Conservation: EPA WaterSense fixtures, rainwater collection system.
- Energy Management System: PV production and usage monitoring.
- Other: EV charging, accessible floorplan, doorways. No-VOC paint, cabinets.
Building Specifications
| Conditioned Area |
2,614
ft2
|
| Bedrooms |
4
|
| Bathrooms |
3
|
| Stories |
2
|
| Climate Zone |
4C
|
| Completion Date |
February 2021
|
Modeled Performance
| |
With PV
|
No PV
|
| HERS Index |
-22
|
35
|
| Annual Energy Cost |
($350.00)
|
$700.00
|
| Annual Energy Cost Savings |
$2,550.00
|
$1,500.00
|
| Annual Energy Savings |
24,300 kWh
|
12,100 kWh
|
| First 30 Years Savings |
$103,500.00
|
$61,700.00
|