Condensation resistance
CR — condensation resistance · the fog-and-sweat number
An NFRC score from 0–100 for how well a window resists interior condensation. Higher resists sweating better.
What it means for you
The number that answers “my windows fog and drip on cold mornings.” In humid NC it's worth checking alongside U-factor — a warm-edge spacer and a lower U-factor lift it. It's an optional rating, so not every label shows it.
Where you'll see it
On the NFRC label when the maker chooses to publish it (0–100 scale).
Related terms
Defined by Marc Hanley
Verified against NFRC
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