How Vinyl Window Ratings Can Save On Your Energy Bill

October 19, 2010

Whether you are contemplating window replacement in an existing home or specifying windows for new construction, you need to do your homework. More than just allowing you to see outside and opening to provide ventilation, windows are a key component of your home's structural integrity and insulation. The right windows can save on utility bills by keeping your home warmer in the winter and cooler in the summer.

Window Materials

Windows consist of two main components: the glass, and the frame. Window frames are made of a variety of materials such as wood, composite, metal, and vinyl. Vinyl is the newest of the window frame materials, and not surprisingly has excellent performance in the areas of insulation, weather-resistance, and ease of maintenance.

Vinyl Windows Ratings and What They Mean

There are a number of vinyl windows ratings numbers that measure a variety of performance factors. These ratings are assigned by manufacturers, and they can usually be found on a label attached to the windows. The ratings must adhere to industry standards. Here are the important vinyl windows ratings criteria and their meanings:

R-Value is a measure of the heat loss through a window. The higher the R-Value, the lower the heat loss

U-Value tells you how well the window performs in preventing air leakage between the sash and the frame. The lower the number, the better; anything below 0.35 qualifies as an energy-efficient window.

Energy Star is a government certification, and may qualify you for tax rebates when you install it.

NFRC ratings are configured by the National Fenestration Rating Counsel. An NFRC label on a window certifies that it will perform as advertised