The Window Source of Akron-Canton Ohio

1482 N Main St. North Canton, OH 44720

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330-497-1500

What is Warm-Edge Technology?

There is Science Behind Energy Efficient Windows.

The layers of glazing in an Insulated Glass Unit (IGU) must be held apart at the appropriate distance by spacers. Because of its excellent structural properties, window manufacturers started using aluminum spacers in the 1960s and 1970s. Unfortunately, aluminum is an excellent conductor of heat and the aluminum spacer used in most standard edge systems represented a significant thermal “short circuit” at the edge of the insulating glass unit, which reduces the benefits of improved glazings. In addition to the increased heat loss, the colder edge is more prone to condensation.

All Window Source windows utilize the latest warm edge spacer technologies that reduce thermal conductivity while improving surface and corner appearance over other insulating glass spacers. Our innovative warm edge spacer systems save energy by insulating the frame and edge of the insulated glass unit making the unit much less conductive around the perimeter.

Warm edge spacers have become increasingly important as manufacturers switch from conventional double glazing to higher-performance glazing. For purposes of determining the overall window U-factor, the edge spacer has an effect that extends beyond the physical size of the spacer to a band about 2-1/2 inches (64 mm) wide. The contribution of this 2-1/2-inch-wide “glass edge” to the total window U-factor depends on the size of the window. Glass edge effects are more important for smaller windows, which have a proportionately larger glass edge area. For a typical residential-size window (3 by 4 feet/0.8 by 1.2 meters), changing from a standard aluminum edge to a good-quality warm edge will reduce the overall window U-factor by approximately .02 Btu/hr-sq ft-°F.
A more significant benefit may be the rise in interior surface temperature at the bottom edge of the window, which is most subject to condensation. With an outside temperature of 0°F, a thermally improved spacer could result in temperature increases of 6-8°F (3-4°C) at the window sightline–or 4-6°F (2-4°C) at a point one inch in from the sightline, which is an important improvement. As new highly insulating multiple layer windows are developed, the improved edge spacer becomes an even more important element.

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See What Our Customers Are Saying About Us

“The entire experience from start to finish was a positive one. Eric and his crew were great to work with. Very professional and they really wanted to make sure we were happy with the job.”

Randy G.

“They have friendly, knowledgeable, and helpful staff. They has the work done in a day and everything was cleaned up. They even helped me with a storm door that was giving me trouble.”

Jessi F.

“The Window Source did an outstanding job for our family and we could not be happier with their quality, value and service.”

Michael W.

“When Eric came to my house, there were no high pressure tactics and he was upfront with us from the start. Thank you Window Source a job well done couldn’t be happier.”

Bill L.

“Great price. Great warranty. Professional through and through. Will definitely use them again and would refer to anyone. Couldn’t be happier!”

Ray K.