Zero Energy Ready SIP Neohouse Bellevue WA

Location: Bellevue, WA

Project Information

Project Type: Residential, < 3,000 sq. ft.
Manufacturer: Premier Building Systems
Builder: TC Legend Homes
Design Professional:
Year Built: 2020


High Performance: Yes
HERS/EUI Index Score: -22
ACH50 - Blower Test Results: 0.47
CO2 lbs./sq.ft./year:

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

• Layout: 4 bdrm, 3 bath, 2 fls, 2,614 ft2
• Climate: IECC 4C, marine
• Completed: February 2021
• Category: Custom for Buyer <3,000 ft2
• HERS Index: without PV 35; with PV -22
• Annual Energy Costs: without PV $700; with PV -$350
• Annual Energy Cost Savings: (vs typical new homes) without PV $1,500; with PV $2,550
• Annual Energy Savings: without PV 12,100 kWh; with PV 24,300 kWh
• Savings in the First 30 Years: without PV $61,700; with PV $103,500

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, CO? 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.

DOE link to this project: Zero Energy Ready SIP Neohouse Bellevue 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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