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Do My Replacement Windows Really Need Low E Glass

Radiant Heat Transfer

Do My Replacement Windows Really Need Low E Glass

One of the most talked about, but maybe least understood, things about a window is "Low E"  and whether or not your Low Country replacement windows really need Low E glass.


Today we'll conclude our series about the three main types of heat gain and loss that a replacement window manufacturer needs to deal with by answering this question, and educating ourselves a bit further about the whole "Low E" concept.

What Does the Low E Glass in My Replacement Windows Actually Do

​The "e" in Low E stands for emissivity.  In its simplest terms, the original incarnation of Low E had to do with restricting the absorption of radiant heat by the glass.

The easiest way to think about radiant heat is to remember your last summertime trip to one of our beautiful beaches.  If the sun was out and your arm got warm you experienced radiant heat.  It's heat that radiates from another source, which most people attribute to the sun.  Think about looking down a long straight stretch of road and seeing what appears to be wavy lines coming up from the road; again, radiant heat.

As you probably already know, heat also radiates from you furnace in the winter time.  So, at the end of the day replacement windows with low e glass in Charleston, Hilton Head and Savannah need a Low E that keeps the furnace heat inside in the winter and, maybe even more importantly, keeps the suns heat out in the summer.​

Is There A Difference In Replacement Windows Low E Glass

Great question, and one that goes back to the beginning where we talked about this concept being one of the least understood .  This really speaks to the evolution, if you will, of Low E.

As the industries experiences and knowledge has grown, there is now a recognition that the best way to handle radiant heat is to not only limit the absorption, but more importantly to reflect it back at its source.

Think about driving through the Citadel Mall parking lot in June.  How many cars do you notice have something folded out in their windshield.  Many of these have almost an aluminum foil look to them.  Whether they know it or not, these folks are taking advantage of this idea about reflecting the sun's heat back at its source.  If you've ever personally used one of these, you can personally attest to the difference in temperature inside your vehicle.​

In the Low Country is There a Difference in Replacement Window Low E Glass

You betcha t​here is!  Some replacement window manufacturers and dealers seem to still be in the dark ages when it comes to replacement window glass, still offering Northern climate products with triple panes and absorption restriction Low E, rather than reflective.

What's needed in a climate such as ours, is replacement window Low E glass that maximizes reflectivity, so that you can keep the furnaces heat in during the winter and the suns heat out in the summer.

The Low E glass that we offer has the same materials that you'd find in the most reflective piece of glass in your home; a mirror, utilizing silvers and silver oxides to create the most climate specific effective Low E that you'll find in Charleston, Hilton Head or Savannah.

Call us today and let us show you how our replacement window Low E glass can block up to 99% of the furnace's or sun's heat from getting in or out of your home.​

Still Researching? We Get It...
Before buying new replacement windows for your home, download and read our ebook "How To Buy Vinyl Replacement Windows" Including a checklist to use when talking to a contractor about replacement windows.

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