If you’re dreaming of a home that’s the ultimate in energy efficiency, take a look at the Passive House standard.
By Ed Welch
Stuart Rue and Sarah Evans’ Passive House in Salem, Ore., features high-performance windows and doors, more insulation and a more extensive ventilation system. Below is a breakdown of the home’s estimated heating savings. Learn more about this building technique in Serious Energy Savings With Passive House Design.
|Total square feet||1,885|
|Built cost||$159 per sq. ft.|
|Specific space heat demand||4.08 kBTU per sq. ft./year|
|Level of insulation||Walls: R-44.1
|Window U-factor||0.105 and 0.178|
|Total energy consumption||22.8 kBTU per sq. ft./year|
|Estimated savings per year in heating bills alone!||More than $800|
Estimated Annual Heating Savings
Heating Energy Used Per Year
Estimated Cost of Winter Heating
|Average home||11,800 kwh¹||$990²|
|Rue-Evans home||2,250 kwh||$154³|
|Total savings||9,550 kwh||$836|
Note that heating savings can be expected to increase each year with inflation and rising energy prices.
1 = Energy Information Administration (EIA), 2005 (most recent)
2 = EIA, 2011 (any fuel)
3 = Assumes electric heat at 7 cents/kwh