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CONSTRUCTION — How do low-E windows work?

Low-emissivity (low-E) glass windows work by controlling the heat transfer through windows with insulated glazing. The windows reflect the heat during the summer, while allowing the heat in during the winter.

“The angles of the sun control it,” said Todd Cantor, general manager of Window King in Gulfport. “The window is designed to allow the warmth to come in when the sun is at a lower angle in the winter. Then there is argon glass that works like invisible insulation between the panes of glass.”


While tax credits for replacing old windows have now expired, Cantor saw a lot of people taking advantage of this when it was in effect. He said people were amazed at the difference in the comfort level of their homes — and the reduction in heating and cooling costs.

“It is a night-and-day difference especially when replacing old single pane windows,” Cantor said. “People can drop their energy bills 40 percent while increasing the comfort, and stopping the fading of furniture, drapes and carpets.”

He recommends foregoing the cheaper windows that have a seal that might not last.

“We give a lifetime guarantee on our products,” Cantor said. “ A good window is going to last. They will pay for themselves in energy savings. That is without a doubt. And a good window is going to be wind rated to have glazing that protects against the high winds. That is ones that can withstand projectiles. You can prevent a lot of damage to the home from the storm if the windows are not breached.”


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