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How to find the best energy efficient windows
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Energy efficient replacement windows
What are the most energy efficient windows?
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- U-factor
- Solar Heat Gain Coefficient (SHGC)
- Visible Transmittance (VT)
- Air Leakage
Energy efficient windows benefits
- Save money: Replacing energy inefficient windows with new energy efficient windows can save you money.1 Energy efficient windows help your home keep heat in cooler months. They also prevent heat from entering during warmer months.
- Protect from UV rays: The type of window glass you choose can help protect items in your home from color fade. Low-E glass helps block UV rays, which can damage furniture color.
- Feel comfortable: One of the signs to replace windows is when you start to notice drafts. Upgrading to energy efficient windows is one of the best ways to reduce energy loss with windows.
How much can you save with energy efficient windows?
Frequently asked questions
The difference between single-hung windows vs. double-hung windows is only one sash moves in a single-hung window. That means fewer paths for air leakage. Both types of windows seal tightly and are energy efficient.
Energy efficiency means using less energy to perform the same function. An easy example is energy efficient lightbulbs. An energy efficient lightbulb will still light a room but use less energy to do so. Energy efficiency is not the same as energy conservation. Energy conservation means reducing a good or service to save energy. Using the lightbulb example, turning off a light is energy conservation.
1Savings reflects installing ENERGY STAR certified products compared to non-certified when replacing single pane windows based on the average savings among homes in modeled cities. Actual savings will vary by product type, location, method of installation, individual home characteristics, local climate and conditions, utility rates and other factors.