U-Factor Ratings
When replacing your windows or patio doors, you'll need to look for the U-factor—a measure of how well the glass prevents heat from passing through it.
You can find the National Fenestration Rating Council (NFRC) U-factor rating on the manufacturer sticker on your new windows or patio doors.
To qualify for the Chelan PUD rebate:
- Windows must have a U-factor rating of 0.30 or lower.
- Patio doors must have a U-factor of 0.35 or lower.