Matt Ferrell's walls have an R-value of 35, equivalent to a U-value of 0.029, which is slightly above the Passive House standard for cool climates of about 0.026.
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Matt FerrellEvidence Quote
“My walls have an R-value of 35, which is equivalent to a U-value of 0.029...just slightly over the Passive House standard for cool climates of about 0.026”
Created: 8/10/2026, 10:59:40 PM
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