Opaque Door Library Help
| U-factor* |
Thermal transmittance factor in I-P (US) units: Btu/(h-ft2-F). As reported by the NFRC or similar source. If an accurate efficiency rating is not available and you make an estimate, air films should be included in that estimate. |
| R-value* |
Thermal resistance factor (inverse of U-factor) in I-P (US) units: (h-ft2-F)/Btu. As reported by the NFRC or similar source. If an accurate efficiency rating is not available and you make an estimate, air films should be included in that estimate. |
*Input may be U-Factor or R-Value depending on user settings
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article