Zero Energy Ready SIP Above-Garage ADU Coupeville WA

Location: Coupeville, WA

Project Information

Project Type: Residential, Tiny House < 900 sq. ft.
Manufacturer: Premier Building Systems
Builder: Clifton View Homes
Design Professional:
Year Built: 2020


High Performance: Yes
HERS/EUI Index Score: 41
ACH50 - Blower Test Results: 2.88
CO2 lbs./sq.ft./year:

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

• Layout: 1 bdrm, 1 bath, 2 fls, 694 ft2
• Climate: IECC 4C, marine
• Completed: July 2020
• Category: Attached Housing
• Annual Energy Costs: without PV $400
• Annual Energy Cost Savings: (vs typical new homes) without PV $600
• Annual Energy Savings: without PV 7,500 kWh
• Savings in the First 30 Years: without PV $25,000

• Walls: SIPs, R-29 total: 6.5" SIPs, draining house wrap, fiber cement siding. 
• Roof: SIPs, R-44 total: fiber cement 10.25" GPS SIPs over trusses; synthetic underlayment; composition shingles and standing seam metal roofing. 
• Attic: No attic, vaulted ceilings. 
• Foundation: Slab on grade, R-20 under slab. R-38 fiberglass batts in joists over garage. 
• Windows: Triple-pane, argon-filled, low-e3, vinyl frame, U=0.16-0.18, SHGC=0.34-0.44. 
• Air Sealing: 2.88 ACH50, continuous SIP envelope with all joints sealed. 
• Ventilation: Range fan timered with fresh air intake thru MERV 19 HEPA filter for balanced ventilation and night-time cooling. Timered bath fans. 
• HVAC: Ducted mini-split heat pump, 10.3 HSPF, 17 SEER, passive solar design. 
• Hot Water: Heat pump, 80-gal, 2.33 EF. 
• Lighting: 100% LED, dimmers, daylighting. 
• Appliances: ENERGY STAR dishwasher, clothes washer, refrigerator. 
• Solar: Solar ready; conduit in place from roof to electrical panel. 
• Water Conservation: Low-flow fixtures; compact plumbing; PEX piping; storm-water management. 
• Energy Management System: N/A 
• Other: EV charging; zero-VOC finishes; recycled content roofing, siding, trim.

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


Affiliated Members

BASF Corporation

Houston, TX
Clifton View Homes

Coupeville, WA
Premier SIPS

Puyallup, WA


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