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.