R-value, the ability of a material to resist heat flow through it, became a household word in the 1970s, when soaring energy costs led to a boom in home insulation. […]
The post Understanding Window Efficiency appeared first on Fine Homebuilding.
R-value, the ability of a material to resist heat flow through it, became a household word in the 1970s, when soaring energy costs led to a boom in home insulation. […]
The post Understanding Window Efficiency appeared first on Fine Homebuilding.
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