Energy Efficient SIP House Seattle WA

Location: Seattle, WA

Project Information

Project Type: Residential, < 3,000 sq. ft.
Manufacturer: Premier Building Systems
Builder: TC Legend Homes
Design Professional:
Year Built: 2016


High Performance: Yes
HERS/EUI Index Score: -2
ACH50 - Blower Test Results: 0.6
CO2 lbs./sq.ft./year:

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

Project Data:
• Name: 19th Avenue
• Location: Seattle, WA
• Layout: 4 bdrm, 2.5 bath, 2 fl, 2,463 ft2
• Climate Zone: IECC 4C, marine
• Completion: May 2016
• Category: custom for buyer
Modeled Performance Data:
• HERS Index: without PV 44, with PV -2
• Projected Annual Energy Costs: without PV $1,053, with PV $25
• Projected Annual Energy Cost Savings (vs home built to 2012 IECC): without PV $811, with PV $1,889
• Projected Annual Energy Savings: without PV 9,453 kWh, with PV 20,993 kWh
• Added Construction Cost: without PV $0

• Walls: R-29, 6" SIP taped at all interior and exterior joints, fiber cement siding.
• Roof: R-42, 10" SIP taped at all interior and exterior joints. Ice-and-water shield, asphalt shingles.
• Attic: None.
• Foundation: R-23 ICF stem walls, R-20 rigid foam under slab.
• Windows: Triple-pane, vinyl-framed, low-e windows, U=0.21.
• Air Sealing: 0.60 ACH 50
• Ventilation: Timered exhaust fans.
• HVAC: Evacuated tube solar hot water and 4.5 COP air-to-water heat pump for in-floor radiant hydronic heat.
• Hot Water: Air-to-water heat pump, 4.5 COP.
• Lighting: 100% LED
• Appliances: ENERGY STAR refrigerator, clothes washer, range hood; induction cooktop.
• Solar: 9.5-kW PV, evacuated tube solar hot water.
• Water Conservation: Low-flow fixtures; centrally located water heater.
• Other: Low-VOC paints and finishes. Electric car charging station.

DOE Link to this project: Energy Efficient SIP House Seattle 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


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