"It feels right to think of and take care of future generations."


Key Features

  • Walls: 2x4, 16" o.c., R-24 total: advanced framed, R-10 rigid foam strips attached to interior stud faces and capped with 1/2" plywood strips, 6" blown-in fiberglass in cavity, weather-resistant barrier, horizontal furring strips, vertical Douglas Fir siding.
  • Roof: Rafter gabled roof: structural sheathing, standing seam metal roofing.
  • Attic: Vented vaulted ceiling: 11" R-44 blown-in fiberglass vent baffles, raised heel trusses.
  • Foundation: Slab on grade: R-10 rigid XPS under slab and at slab edge.
  • Windows: Double-pane, argon-filled, low-e2, fiberglass frame, U=0.27, SHGC=0.24.
  • Air Sealing: 1.9 ACH50, sealed all wall penetrations with canned foam before drywalling; used depressurization fan to find leaks; sill seal at plate, baffles sealed to top plates.
  • Ventilation: Exhaust-only, low-speed continuous with boost for spot ventilation.
  • HVAC: Ductless mini-split heat pump, 12.8 HSPF, 24.6 SEER, electric baseboard.
  • Hot Water: Heat pump water heater, 50-gal, 3.39 EF.
  • Lighting: 100% LED.
  • Appliances: ENERGY STAR refrigerator, stacking clothes washer and dryer.
  • Solar: 3.5-kW in community solar system.
  • Water Conservation: Low-flow fixtures, compact plumbing, stormwater management.
  • Energy Management System: N/A
  • Other: EV charging. Accessible entries, bedroom, bathroom. Low/no-VOC paints, stains, adhesives, caulks, finishes; no composite wood in trim, formaldehyde-free cabinets.

Building Specifications

Conditioned Area 561 ft2
Bedrooms 2
Bathrooms 1
Stories 1
Climate Zone 4C
Completion Date February 2019

Modeled Performance

  With PV No PV
HERS Index 0 52
Annual Energy Cost $200.00 $650.00
Annual Energy Cost Savings $450.00 $250.00
Annual Energy Savings 8,200 kWh 4,200 kWh
First 30 Years Savings $18,300.00 $9,500.00