Solar SIP Powerhouse Lynden WA
Location: Lynden, WA
Project Information
| Project Type: | Residential, < 3,000 sq. ft. |
|---|---|
| Manufacturer: | |
| Builder: | TC Legend Homes |
| Design Professional: | |
| Year Built: | 2024 |
Performance
| High Performance: | Yes |
|---|---|
| HERS/EUI Index Score: | -24 |
| ACH50 - Blower Test Results: | 0.45 |
| kBtu/sq.ft./year: | |
| CO2 lbs./sq.ft./year: |
Awards/Certifications: DOE Zero Energy Ready Home, ENERGY STAR Certified, EPA Indoor AirPLUS, Passive House
PROJECT DATA
• Layout: 5 bdrm, 5 bath, 2 fl, 2,391 ft²
• Climate: IECC 4C, marine
• Completed: September 2023
• Category: Custom
MODELED PERFORMANCE DATA
• ERI: without PV 33; with PV -24
• Annual Energy Costs: without PV $1,100; with PV $100
• Annual Energy Cost Savings: (versus typical new homes) without PV $1,850; with PV $3,700
• Annual Energy Savings: without PV 11,626.3 kWh, with PV 31,951 kWh
• Savings in the First 30 Years: without PV $77,550; with PV $155,600
KEY FEATURES
• Walls: SIPs, R-29 total. 6.5" graphite SIPs, self-adhered breathable weather-resistant membrane, plastic mesh, fiber cement siding.
• Roof: SIPs gable roof, self-adhering breathable vapor barrier. Metal roofing.
• Attic: Unvented vaulted ceilings: 10.25" R-48 graphite EPS SIP panels.
• Foundation: Slab on grade with 11.25" R-23.6 ICF stem wall. R-20 foam under slab.
• Windows: Triple-pane windows, U=0.16, SHGC=0.45, Low e, argon fill. Extended roof and eaves.
• Air Sealing: 0.45 ACH50; All SIP panel joints are double-bead mastic sealed; internal seams are taped, windows are foamed-in, all penetrations sealed with foam; whole-house sealed with aerosolized acrylic.
• Ventilation: HRV, integrated with HVAC system. Humidistat, motion sensor, CO2, PM, VOC, and temperature monitor.
• HVAC: Air-to-water heat pump, radiant floor heating, 3 fan coils, 4.62 COP.
• Hot Water: Air-to-water heat pump, combined domestic hot water and space heating, 80-gal, 4.62 COP. Adaptive recirculation. WaterSense-labeled fixtures.
• Lighting and Appliances: LED lighting, ENERGY STAR appliances.
• Solar: 17-kW PV, 30.7-kWh batteries.
• Energy Management System: IAQ monitoring.
• Other: Two EV chargers and an RV charger. 5,000-gallon rainwater cistern for irrigation.
To check out other Zero Energy Ready Homes, visit the Department of Energy’s Tour of Zero.
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