Zero Energy Ready SIP Power House Bellingham WA

Location: Bellingham, WA

Project Information

Project Type: Residential, < 3,000 sq. ft.
Manufacturer: Premier Building Systems
Builder: TC Legend Homes
Design Professional:
Year Built: 2015


High Performance: Yes
HERS/EUI Index Score: -12
ACH50 - Blower Test Results: 0.64
CO2 lbs./sq.ft./year:

Awards/Certifications: DOE Zero Energy Ready Home, ENERGY STAR Certified, EPA Indoor AirPLUS

Project Data:
• Name: Bellingham Power House
• Location: Bellingham, WA
• Layout: 4 bedrooms, 3 baths, 2 floors
• Conditioned Space: 2,781 ft2
• Climate Zone: IECC 4C, marine
• Completion: March 2015
• Category: Custom
Modeled Performance Data:
• HERS Index: without PV 34, with PV -12
• Projected Annual Utility Costs: without PV $883, with PV $-191
• Projected Annual Energy Cost Savings (compared to a home built to the 2012 IECC) without PV $557, with PV $1,586
• Builder’s Added Cost Over 2012 IECC: without PV $7-11/ft2 , with PV $21-25/ft2
• Annual Energy Savings: without PV 30 MMBtu, with PV -11 MMBtu


• DOE Zero Energy Ready Home Path: Performance 
• Walls: 8" SIPs (R-30); house wrap; fiber cement siding. 
• Roof: 12" (R-46) SIPs; standing-seam steel roofing. 
• Attic: 12” (R-46) SIPs. 
• Foundation: ICF walls (R-28); rigid foam under slab (R-20). 
• Windows: Triple-pane; argon-filled; vinylframed; low-e; U=0.16; SHGC=0.50. 
• Air Sealing: 0.64 ACH 50. 
• Ventilation: HRV; 4" earth tube. 
• HVAC: Air-to-water heat pump; COP 4.4; radiant floor heat. 
• Lighting: 100% LED.
• Appliances: ENERGY STAR-rated refrigerator, clothes washer, and dishwasher. 
• Solar: 9.9 kW PV. 
• Water Conservation: EPA WaterSenserated toilets; low-flow fixtures; rainwater collection for irrigation; native plants. 
• Other: Energy management system; electric car-charging station; passive solar design; accessory apartment; low-VOC.

DOE link to this project: Zero Energy Ready SIP Power House Bellingham WA

To explore other Zero Energy Ready Homes, visit the Department of Energy’s Tour of Zero page.


Affiliated Members

BASF Corporation

Houston, TX
Premier SIPS

Puyallup, WA


SIPA Website Sponsors