Cedarwood Zero Energy Home Bellingham WA

Location: Bellingham, WA

Project Information

Project Type: Residential, < 3,000 sq. ft.
Manufacturer: Premier Building Systems
Builder: TC Legend Homes
Design Professional: TC Legend Homes
Year Built: 2014


High Performance: Yes
HERS/EUI Index Score: 13
ACH50 - Blower Test Results: 0.67
CO2 lbs./sq.ft./year:

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

BEA: 2015 Overall SIP Building Excellence Competition Winner.
2014 Department of Energy Housing Innovation Award winner.

SIPs and an ICF basement make this high performance home close to Passive House standards.

The 1,055-ft2 home sports high-efficiency appliances, a balcony, a greenhouse, a patio, a loft, tongue-andgroove pine ceilings, and solar photovoltaic panels.

A 3.2-kW PV system is all it takes to power the home, thanks to a highly insulated building envelope and high-performance equipment, which helped earn the home a certification from the U.S. Department of Energy’s Zero Energy Ready Home program.

The slab-on-grade foundation was poured over an R-20 layer of rigid highdensity EPS foam. One course of 16-inch-high insulated concrete form (ICF) blocks was set 10 inches in the ground at the perimeter to create the footing wall and to provide R-28 of slab-edge insulation.

SIP Benefits:
 - Low utility costs
 - SIPs affordable option for high performance building envelope

Key Features:

  • Walls: 6 in. SIPs R-26; pre-finished fiber cement siding; house wrap
  • Roof: 10 in. SIPs R-42; metal standing seam roof
  • Foundation: ICF foundation R-28; R-20 rigid high-density EPS foam board under slab
  • Windows: Triple-paned vinyl-frame, U=0.20, SHGC=0.45
  •  Air Sealing: 0.67 ACH 50
  • Ventilation: 30 cfm, 2.7-Watt continuous exhaust fan in bathroom balanced by earth tube that brings in filterered, tempered outside air passively via 100-ft, 6-inch-diameter pipe buried 2 feet below ground inside foundation footing. Spot ventilation fans in kitchen and utility closet
  • HVAC: One ductless heat pump 12 HSPF, 21.5 SEER
  • Hot Water: Instant tankless condensing gas-fired water heater; 0.96 EF
  • Lighting: 100% LED for all fixed lights, 100% CFL for lamps
  • Appliances: High-efficiency electric washer-dryer combo
  • Solar: 3.2-kW PV
  • Water Conservation: Low-flow faucets, shower head
  • Other Low- to no-VOC glues, adhesives, and paints; water-based sealer on concrete floor

DOE Link to this project: Cedarwood Zero Energy Home Bellingham WA

To explore other Zero Energy Ready Homes, visit the Department of Energy’s Tour of Zero page.


Affiliated Members

BASF Corporation

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Premier SIPS

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