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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site exterior doors An exterior door can contribute significantly to air leakage in a home – as well as some heat transfer – if it's old, not properly installed, and/or not properly air sealed. This can result in energy losses. See the following pages for more information: Selecting new exterior doors Installing new exterior doors Adding storm doors to existing doors Weatherstripping existing doors to prevent air leakage Source: US Department of Energy Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP