"We did analyze incremental costs and other factors such as product availability and determined
that those costs were negligible compared to the branding power of building efficient healthy homes."


Key Features

  • Walls: Panelized, 2x6 24 in o.c., R-19 total: advanced framed, R-23 blown fiberglass in cavity. Factory-installed coated OSB sheathing taped. Fiber cement lap siding.
  • Roof: Truss gabled roof: self-adhered underlayment, 30-year architectural asphalt shingles.
  • Attic: Vented attic: 20" R-50 blown-in fiberglass in attic.
  • Foundation: Insulated basement: 10" poured concrete walls, spray-on damp proofing; R-19 closed-cell foam in rim joists; R-19 fiberglass drape on interior basement and crawl space walls. Active radon vent in aggregate below sealed 6-mil crawl vapor barrier. Exterior perimeter drain pipe to sump.
  • Windows: Double-pane, argon-filled, low-e, vinyl frame, U=0.29, SHGC=0.31.
  • Air Sealing: 1.7 ACH50, closed-cell spray foam at rim joists and exterior penetrations.
  • Ventilation: Exhaust-only, MERV 14 filter, 59 CFM/Watt.
  • HVAC: Gas furnace, 95 AFUE, modulating furnace, variable speed fan motor, AC unit, 13 SEER, rigid metal duct system, ducts in conditioned space.
  • Hot Water: Gas tankless, .96 EF, smart recirc pump.
  • Lighting: 100% LED.
  • Appliances: ENERGY STAR dishwasher, refrigerator, hood vent.
  • Solar: 4 kW, rooftop panels.
  • Water Conservation: Low-flow fixtures; central manifold with PEX piping; hot water recirc.
  • Energy Management System: Smart thermostat.
  • Other: Low/no-VOC finishes, flooring, cabinets; active sub-slab radon venting.

Building Specifications

Conditioned Area 2,916 ft2
Bedrooms 3
Bathrooms 2.5
Stories 2
Climate Zone 5B
Completion Date February 2021

Modeled Performance

  With PV No PV
HERS Index 34 51
Annual Energy Cost $800.00 $1,400.00
Annual Energy Cost Savings $2,250.00 $1,700.00
Annual Energy Savings 8,300 kWh 3,600 kWh
First 30 Years Savings $110,500.00 $82,500.00