What Does Low E Window Mean?

Marble Top Kitchen With Windows

The Benefits of Low E Glass Windows

Your windows are not just for the scenery, they can also assist home systems in maintaining their temperatures. Believe it or not, but Low E glass windows can be viewed to work hand and hand with your energy efficient HVAC systems with their low emissive abilities to maintain stable indoor temperatures. If you’re finding that your home has been having trouble in maintaining heat in the winter or getting rid of it in the summer and you hear your HVAC turning on and off to keep up with temperature fluctuations consider Low E Windows in Richardson, TX! Here are some helpful information regarding Low E glass windows so you can get an idea of their advantages for your home or business.

How long do Low E windows last?

Low E glass windows last around 10-15 years. Factors that can affect the life span can vary from the climate if it’s used in the outside of your windows where it can be exposed to the weather.

What is Low E in a window?

Low E glass windows translate to low emissivity which means that the surface of a window is emitting low levels of radiant heat. In general, any surface has the ability to absorb, reflect or transmit heat so with a Low E window coating the amount of heat that’s being transferred is reduced. With Low E glass windows there is the ability to reduce heat transference while also stopping UV radiation waves. What’s unique with Low E glass windows are that visible light is still able to come in. As far as the coating itself it is applied thinly and consists of metallic particles. Low E glass windows are not the same as tinted glass as a tinted window will only be able to block light and not the UV waves or heat. As of such, window tints can appear to vary in color dependent on window size while Low E glass windows won’t vary in appearance no matter the window. Unlike tinted windows, Low E glass windows won’t get very hot as they reflect heat back out. It’s designed to keep your home at constant and comfortable temperatures. As far as coatings, soft coat Low-E are the most efficient with the metal applied to the glass in a vacuum chamber evenly. This type of coating construction is typically applied on the inside of a double pane glass unit in order for it not to be scratched or touched. 

Does Low E go inside or outside?

Low E glass windows are technically coatings that could be applied on the inside or outside of a windowpane depending on the climate or type of windowpane. With colder climates, Low E glass windows have coatings that should be applied to the inside of a windowpane to keep heat trapped in. In this way, radiant heat is kept on the same side of the window in which it originates. With warmer climates, Low E glass windows will have coatings outside of the windowpane in order to keep the heat from the sun out.

Low E Windows vs Double Pane

Low E glass windows are window coatings while a double pane window is a window with two pieces of glass within a frame. As of such, double pane windows are just like any other window glass and can be tinted, coated or clear according to preferences. Typically with a double pane and Low E glass windows, soft coating construction is applied in the inside of the windowpanes.

Large Four Pane Window Looking Into Summer Backyard w/Pool & Garden

Low E Windows Benefits


  • Reduce Energy by 30-50%
  • Only 10-15% More in Costs
  • Different Coating Constructions
  • Doesn’t Vary in Coating Appearance
  • Can Be Applied Inside/Outside Window
  • Prevents UV Radiation Waves
  • Reduces Heat Transfer
  • Maintains Indoor Temperatures
  • Last 10-15 Years

Is Low E glass worth?

Low E glass windows are an excellent investment with their well-reviewed performance characteristics. They have different coating constructions or applications which can block as much as 99.5% of UV light. Some may even double the value of insulation than a soft Low E coat. As of such, in general, a Low E coat is only 10-15% more than typical windows and are worth the price as properties tend to lose 25% of their heat through the windows.

Do Low E windows save energy?

Low E windows energy savings typically cost about 10-15% more than regular windows however they will lower energy loss by 30-50% in a given climate. Low E glass windows save energy in that they assist in keeping or maintaining stable overall indoor temperatures which assist the HVAC system is working smoothly and not overworking itself to keep programmed temperatures. Oftentimes, HVAC units are fighting against outdoor temperature fluctuations which affect indoor insulation and temperatures. With Low E glass windows you can expect conservation of energy which in turn reduces energy bills!

If you’re interested in Low E glass windows in Richardson, TX call (972) 798-8901 with Pillar Roofing & Construction!