What is the R-value of a typical double pane wood window?

A typical double pane wood window generally has an R-value of about R-1.8, which reflects its insulating properties in relation to heat transfer. The R-value measures the effectiveness of insulation, with higher values indicating better thermal resistance.

In the case of double pane windows, the R-value comes from the combination of two layers of glass and the air or gas (like argon) between them, which creates an insulating barrier that slows down heat flow. Double pane windows offer improved energy efficiency compared to single-pane windows, which typically have much lower R-values.

This R-value is relevant for energy efficiency assessments in both residential and commercial buildings, as it helps determine how well the windows will contribute to maintaining indoor temperatures and reducing energy costs. The other options provide values that do not adequately represent the performance of a typical double pane wood window, which is why they are not considered accurate.