Energy efficiency is a major concern for South Florida homeowners, where air conditioning accounts for a large portion of monthly utility bills. Low-E, or low-emissivity, glass coatings applied to impact windows significantly reduce the amount of solar heat that enters your home while still allowing visible light to pass through. This technology transforms your impact windows from simple storm protection into sophisticated energy management systems that pay for themselves through reduced cooling costs.
Low-E coatings work by reflecting infrared radiation, which is the portion of the solar spectrum responsible for heat transfer, while transmitting visible light. In South Florida's climate, a Low-E coating on the exterior surface of your impact window glass can reject a substantial percentage of the sun's heat energy before it enters your home. This means your air conditioning system runs less frequently and for shorter cycles, reducing both your energy consumption and your monthly electric bills. Over the life of the windows, these savings can amount to thousands of dollars.
There are different types of Low-E coatings optimized for different climates. In South Florida, you want a solar control Low-E coating that prioritizes heat rejection over heat retention. These coatings have a lower Solar Heat Gain Coefficient, or SHGC, which measures how much solar energy passes through the glass. Look for impact windows with a low SHGC rating for the best performance in South Florida's hot, sunny climate. Pair this with a high Visible Transmittance rating to ensure your rooms remain bright and welcoming despite the heat-rejecting properties of the glass.
Argon gas fills between the glass panes of insulated impact windows further improve energy efficiency. This inert gas is denser than air and reduces heat conduction through the window assembly. When combined with Low-E coatings, argon-filled impact windows can achieve U-factor ratings that dramatically outperform minimum code requirements. For our South Florida customers looking to maximize energy savings while maintaining hurricane protection, specifying Low-E coated, argon-filled impact windows is the optimal choice for every opening in the home.