"The indoor air quality inside our house has become even more important over the past year, with the global pandemic
and historic forest fires, and especially now with a 6-month-old daughter."


Key Features

  • Walls: Double wall, R-39 total: two 2x4 24" o.c. walls set 2.5" apart, advanced framed, 9.5" blown fiberglass, 7/16" OSB sheathing, drain wrap, engineered wood siding.
  • Roof: Truss gable roof: 14" raised heel trusses, 7/16" roof sheathing, self-adhered membrane at eaves and valleys, 10-mil synthetic underlayment, 30-year asphalt shingles.
  • Attic: Vented attic: 20" R-50 blown-in fiberglass, 14" raised energy trusses.
  • Foundation: Basement: poured concrete; finished basement walls are 2x4 24" o.c. with R-15 fiberglass batts; unfinished walls have R-19 fiberglass drape. Active radon vent with fan in 4" aggregate under 6-mil slab vapor barrier.
  • Windows: Double-pane, argon-filled, low-e, vinyl frame, U=0.24, SHGC=0.2.
  • Air Sealing: 1.80 ACH50, closed-cell spray foam top plates and rim joists.
  • Ventilation: Continuous exhaust paired with fresh air supply; temperature and humidity sensors on fresh air intake. MERV 7 filter on intake. MERV 13 filter on supply.
  • HVAC: Central air-source heat pump, 3.24 COP, 17.8 SEER, AC variable speed compressor.
  • Hot Water: Heat pump water heater, 3.55 UEF, 65-gal; recirculation pump.
  • Lighting: 100% LED.
  • Appliances: ENERGY STAR dishwasher, clothes washer, clothes dryer, induction cooktop.
  • Solar: 7.8-kW rooftop panels, 10-kW battery storage.
  • Water Conservation: Low-flow fixtures, PEX piping: hot-water recirc; smart irrigation.
  • Energy Management System: Energy monitoring system, keypad camera.
  • Other: Low/no-VOC paint, Green Label Plus carpet, KCMA-certified cabinetry, GreenGuard-certified hardwood flooring; prewired for EV charging.

Building Specifications

Conditioned Area 3,934 ft2
Bedrooms 4
Bathrooms 4.5
Stories 2
Climate Zone 5B
Completion Date August 2020

Modeled Performance

  With PV No PV
HERS Index 5 39
Annual Energy Cost $200.00 $1,500.00
Annual Energy Cost Savings $3,300.00 $2,200.00
Annual Energy Savings 31,100 kWh 19,700 kWh
First 30 Years Savings $134,500.00 $88,300.00