The Benefits of Replacement Windows with Low-E Glass

About Low E WindowsThe windows of a home are often replaced for one or both of these reasons: to improve the overall appearance of the home and increase its energy efficiency.  

The vinyl frames of new replacement windows can greatly improve the situation on both fronts but coated Low-E glass can really boost the energy efficiency of a home.

The coating on Low-E glass prevents the sun’s UV rays from entering the home which brings several benefits in addition to increased energy efficiency.

Green T Windows offers a variety of new vinyl replacement windows that all feature Low-E glass.


For a free estimate call: (630) 717-0007


The coating on Low-E glass windows works by stripping sunlight of its long-wave radiation, which is the heat source, while allowing short-range radiation, the light, into the home.  Radiation is the leading cause of heating and cooling loss in homes so reflecting the radiation while still allowing the light to pass through greatly improves the heating and cooling efficiency.

Related: The Benefits of Effective Air Sealing for Your Home

While improved energy efficiency is the main benefit of Low-E glass, blocking the sun’s radiation also leads to several other benefits:

  • Improved Comfort: Not only does Low-E glass reduce the radiant heat level of a home, but it also reduces condensation, mold, and mildew as well as outside noises.
  • Lower Energy Bills: Improved energy efficiency means that the heating and air conditioning will have to run less often which leads to lower bills.
  • Protection of Furnishings: Radiation from the sun can cause the color on drapes, carpet, and furniture to fade and Low-E glass reduces this possibility by blocking the radiation.
  • Improved Appearance: Replacement Low-E glass windows not only improve comfort and energy efficiency, but they can also improve the appearance of your home as well.

Installing new vinyl windows with Low-E glass can improve the appearance of your home while also improving the energy efficiency and overall comfort inside the home.

Green T Windows offers vinyl replacement windows with Low-E glass in a range of different styles including double hung, garden windows, sliders, pictures, and more.

Contact Green T Windows to learn more about the benefits of our Low-E glass replacement windows. Call Us: (630) 717-0007

The Benefit of Low-E Glass

Most vinyl replacement windows, including those available from Green T Windows, feature low-e glass, but what is low-e glass and why is it beneficial for your home?  In very basic terms, a material that has low emissivity (low-e) absorbs and emits a low proportion of radiant thermal heat or energy while reflecting a much high proportion.  New windows generally have film coatings to give them lower emissivity which contributes to less heating and cooling loss and better energy efficiency within a home.

All materials have an emissivity value which ranges from 0 to 1.  Materials with a low-e value absorb small amounts of heat while reflecting most of it and materials with a high-e value absorb most of the heat and reflect poorly.  Emissivity values represent the percentage of energy absorbed so a material with an emissivity value of 0.05 absorbs 5 percent of the energy while reflecting 95 percent and a material with a high-e value of 0.90 absorbs 90 percent of the energy while only reflecting 10 percent.

Naturally, glass has a very high thermal emissivity value, but applying special thin film coatings to the glass can give it a much lower emissivity value.  Low-e glass reflects a high percentage of radiant energy and keeps excess heat from transferring to the other side of the glass.  Therefore, low-e glass windows help keep heat inside the home during the winter and reflect the heat from the sun while allowing the light in during the summer to keep the home cooler, ultimately leading to more efficient energy usage and lower bills.

All of the vinyl replacement windows available from Green T Windows feature low-e glass to provide improved energy efficiency.  The low-e coating also reduces water spots for easier cleaning and maintenance.  Contact Green T Windows to learn more about the benefits of low-e glass and our vinyl replacement windows.