It's hardly news that windows have an impact on a building's energy use. But even experienced facility managers may be surprised to learn how big that impact can be. But by paying attention to key energy use metrics and new window technology, windows can be used to help maximize energy savings.
According to the Department of Energy's 2010 Buildings Energy Data Book, windows are responsible for about 5 percent of all energy used by buildings in the U.S. That means that inefficient windows can quickly lead to a big financial hit.
"Especially in commercial buildings which are large and have lots of windows, it imposes a tremendous heating and cooling cost," says Ray McGowan, senior program manager with the National Fenestration Rating Council (NFRC).
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