"We believe that designing and building DOE Zero Energy Ready Homes promotes stewardship of our natural resources."


Key Features

  • Walls: 2x4, 24" o.c. + Larsen truss, R-48 total: advanced framed walls with 3.5" blown fiberglass, 7/16" coated OSB taped, TJIs with 9.5" dense-packed fiberglass held by breathable membrane, 2x4 horizontal furring behind vertical Western Red Cedar.
  • Roof: Vaulted ceilings with scissor truss, 5/8" coated OSB sheathing with taped seams, high-temperature underlayment, standing-seam metal roof, Cool Roof-certified.
  • Attic: Vented R-76 total: two layers R-38 fiberglass batt in bottom cord of scissor truss.
  • Foundation: Slab on grade: 12" R-48 EPS under slab, 9.5" R-38 EPS at slab edge. 10-mil poly vapor air barrier.
  • Windows: Triple-pane, argon, low-e, aluminum-clad wood, awnings, U=0.147, SHGC=0.33.
  • Air Sealing: 1.49 ACH50, continuous air barrier from below slab to peak of roof: under-slab barrier connected to wall and ceiling membrane with tapes and sealants, all holes sealed.
  • Ventilation: ERV, MERV 8 filter, 131 CFM, 157 Watts, 78% SRE.
  • HVAC: Ducted mini-split heat pump, 2.9 COP, 17 SEER. Passive solar design.
  • Hot Water: Heat pump water heater, 66-gal, 3.35 COP. All hot water lines insulated to R-4.
  • Lighting: 100% LED, large floor-to-ceiling windows for daylight.
  • Appliances: ENERGY STAR refrigerator, dishwasher, 4 ceiling fans, exhaust fan, water heater.
  • Solar: 11.5 kW, rooftop panels.
  • Water Conservation: Low-flow fixtures, compact plumbing design, PEX piping.
  • Energy Management System: N/A
  • Other: EV charging; accessible shower, doors, and floorplan.

Building Specifications

Conditioned Area 2,001 ft2
Bedrooms 3
Bathrooms 2
Stories 1
Climate Zone 5A
Completion Date January 2021

Modeled Performance

  With PV No PV
HERS Index -25 30
Annual Energy Cost $200.00 $1,450.00
Annual Energy Cost Savings $5,100.00 $3,900.00
Annual Energy Savings 28,400 kWh 14,100 kWh
First 30 Years Savings $207,300.00 $157,900.00