R-7.5 insulation under the concrete slab
Foundation walls 96 inch clear height
Foundation walls insulated to R-22, rim joists to R-24.5
Foundation walls insulated to R-17, rim joists to R-24.5
Foundation walls insulated to R-12 rim joists to R-23
Foundation walls insulated to R-10, rim joists to R-10
Insulated exterior walls
Thermal bridging eliminated from exterior walls
Ceiling insulation
Thermal bridging eliminated from the ceiling
Triple-paned, double low-E, double argon filled windows
Double-paned, low-E, argon filled windows
Air leakage: Measured at less than 1 air changes/hour
Air leakage: Measured at less than 2.5 air changes/hour
Air leakage: Measured at less than 3.5 air changes/hour
Air leakage: Unknown
Heat Recovery Ventilator recovers up to 76% of heat lost through ventilation.
HRV (Heat Recovery Ventilator) unknown
Rigid, galvanized steel ventilation ducts
Flexible ventilation ducts
Balanced HRV
Unbalanced HRV
Maximum southern exposure
Optimized thermal mass
Wastewater heat recovery
Solar panel heat recovery
Optimal use of natural light
Fresh air supply to all living areas
Steady, balanced ventilation to all living areas
Uniform temperatures and controlled humidity
Timer controlled bathroom ventilation
Geothermal heating (heat pump draws energy from a ground well)
Photovoltaic solar panels