Zero Energy SIP Montlake 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: 2014


High Performance: Yes
HERS/EUI Index Score: -1
ACH50 - Blower Test Results: 0.97
CO2 lbs./sq.ft./year:

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

Project Data:
• Name: Montlake Modern
• Location: Seattle, WA
• Layout: 4 bedrooms, 3.5 baths, 2 floors
• Conditioned Space: 3,192 ft2
• Climate Zone: IECC 4C, Marine
• Completion: May 2014
• Category: Custom
Modeled Performance Data:
• HERS Index: without PV 42, with PV -1
• Projected Annual Utility Costs: without PV $797, with PV $21
• Projected Annual Energy Cost Savings (compared to a home built to the 2012IECC): without PV $1,002, with PV $2,326
• Annual Energy Savings: without PV Electric (kWh) 15,367, with PV 25,067 kWh

• DOE Zero Energy Ready Home Path:
• Walls: R-6, 6-inch SIP walls; pre-finished fiber cement siding; draining house wrap
• Roof: R-46, 12-inch SIPs; metal standing seam roof
• Foundation: R-28 ICF slab edge, R-20 rigid foam under slab
• Windows: Triple-pane; vinyl-framed; lowemissivity; U=0.097, SHGC=0.62
• Air Sealing: 0.97 ACH 50
• Ventilation: 5.4-watt exhaust fan in laundry runs continuously at 30 cfm to meet ASHRAE 62.2, switch-controlled bath exhaust fans.  HEPA-filtered fresh-air intake with fan for passive makeup air but controlled to power on when 400-cfm range hood is turned on 
• HVAC: Radiant floor heat
• Hot Water: 5-ton air-to-water heat pump, COP 4.5 provides hot water for radiant floors and pre-heats domestic hot water; 50-gallon electric tank stores water and boosts temperature
• Lighting: 100% LED
• Appliances: ENERGY STAR refrigerator, dishwasher, clothes washer
• Solar: 9.7-kW PV system
• Water Conservation: Low-flow fixtures
• Other: PV monitoring system; programmable thermostats; electric car charging station; low/no-VOCs glues, adhesives, and paints


Affiliated Members

TC Legend Homes
Bellingham, WA


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