Energy Efficient SIP Ballard 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: 2011


High Performance: Yes
HERS/EUI Index Score: -1
ACH50 - Blower Test Results: 0.56
CO2 lbs./sq.ft./year:

Awards/Certifications: Zero Energy Ready, ENERGY STAR Certified, EPA Indoor AirPLUS, Nat'l Green Building Standard

Project Data:
• Name: Thomas/Salmon Residence
• Location: Ballard, Seattle, WA
• Layout: 3 bedrooms, 2 baths, 2 floors, no basement
• Conditioned Space: 1,915 ft2
• Completion: October 2011
• Climate Zone: 4C
• Category: Custom
Performance Data:
• HERS Index without solar PV: 37
• HERS Index with solar PV: -1
• Projected total annual energy cost savings (compared to a similar house built to the 2006 IECC): with solar $1,344, without solar $605
• Projected annual utility costs: with solar $74; without solar $739
• Annual PV production revenue: $1,333
• Annual energy savings: without solar 7,118 kWh; with solar 8,700 kWh

• Path: performance
• Walls: 6.5-inch SIPs with 5-5/8-inch EPS foam for R-26; corrugated house wrap; fiber cement siding
• Attic: 10-1/4-inch SIPs (9-3/8-inch EPS foam core) for R-41
• Foundation: slab on grade with 4 inches (R-20) XPS rigid insulation under slab and 2 inches (R-10) XPS at perimeter of foundation walls
• Windows: triple-pane, argon-filled, vinyl-framed, with low-e coating on 3 sides; U=0.15 to 0.20 SHGC=0.50
• Air Sealing: 0.56 ACH 50
• Ventilation: timer-controlled fans balanced to bring in and exhaust air, HEPA MERV 19 filters 
• HVAC: air-to-water heat pump (3-ton,35,400 Btu/h capacity, efficiency of COP 3.0-5.5, 9.2 HSPF) provides hot water for 1st floor radiant heat
• Hot Water: air-to-water heat pump preheats water for electric storage tank heater
• Lighting: 100% LED and CFL, 4 ENERGY STAR ceiling fans, solar tubes
• Appliances: ENERGY STAR dishwasher, clothes washer, refrigerator (all lowest energy use in their categories)
• Solar: 6.44 kW installed
• Water Conservation: low-flow plumbing fixtures; 100% xeriscaped with native drought-tolerant plants, drip irrigation from rain barrels for vegetable garden only
• Other: thermal mass concrete floors, passive solar design. No-VOC paints and finishes. Reclaimed flooring, tubs, and sink. Locally sourced SIPs
• Electric Car Charging Station: not installed but roughed in


Affiliated Members

TC Legend Homes
Bellingham, WA


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