Low-e films are also applied to special plastic sheets used as interpanes in new windows for significant additional energy savings. When buying new or replacement windows, low-e coatings are a good investment. Patio sliding door I would like information on the most efficient sliding patio door. The door we now have builds up moisture on the inside of the door and has rotted away our floor by the door. The best door for you is probably one that has good efficiency and sound construction, consisting of good materials, workmanship, and hardware.
Proper installation is equal in importance to the design of the door.
New technology is constantly improving the performance of products. Features such as triple glazing may not be as good an indicator of energy performance as they once were. All of these features can be confusing, but uniform testing of windows and doors is available. When shopping for windows or doors, ask for the NFRC total unit U-value for the particular window or door. Subscribing to the NFRC rating system is voluntary, but many manufacturers choose to participate.