Mind your Rs and Us

Two important letters that relate to home comfort

I’m excited to share this post that I have been working on for a while. After I discovered R-values, I learned that window efficiency is measured with U-values. Why couldn’t they make it easier and use the same values? It’s complicated so I tried to explain it simply.

U-value on a window label (left) and R-value on insulation

Both R-values and U-values a…