Your choice of replacement windows and doors will have a big impact on your home’s heating and cooling expenses. Patio doors follow the same performance standards as windows, with a few notable differences. These are set by the National Fenestration Rating Council (NFRC). Renewal by Andersen® of Greater Philadelphia explains what you need to know about these standards below.
To earn ENERGY STAR® certification, doors and windows must meet several exacting requirements. The doors must be made by an ENERGY STAR partner and they must be tested and certified by the NFRC in the following performance standards.
- U-Factor: This is a measurement of how well a door allows heat to pass through. The U-factor falls between 0.25 and 1.25, with lower numbers denoting better insulating abilities.
- Solar Heat Gain Coefficient (SHGC): This is a measurement of how much of the sun’s heat the door is able to resist. Ratings fall between 0 and 1, and you should choose doors with a rating between 0.25 and 0.8.
- Glazing Level: The glazing levels for door and window replacement units are also a standard of measurement set by ENERGY STAR. Patio doors commonly have high glazing levels, which means they’ll have different ratings than other types of doors.
If you’re not sure exactly what ratings to look for, don’t worry. Just make sure you choose an experienced, knowledgeable contractor, and they’ll be happy to guide you through the process. Keep in mind that your local climate is an important factor in determining what type of door would best suit your needs.
At Renewal by Andersen® of Greater Philadelphia, we are your leading provider of top-notch patio doors as well as replacement windows. Give us a call at (610) 563-2190 or fill out our contact form to request a no-obligation in-home consultation today. We serve homeowners in New Jersey and Philadelphia.