Search
Products, service packages, technical guides and answers — everything published on this site.
2 results for “U-factor”
- AnswerWhat U-factor do I need for my climate zone?ENERGY STAR's residential window thresholds are a U-factor of 0.22 or lower in the Northern zone, 0.25 or lower in North-Central, 0.28 or lower in South-Central and 0.32 or lower i
- AnswerWhat documentation should a window supplier give me?Ask for the NFRC CPD number for every rated unit, the whole-window U-factor and SHGC behind it, shop drawings and a CAD schedule at quotation, the impact test protocols where relev