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NFRC Certification | Houston & Stafford, TX

National Fenestration Rating Council (NFRC) is a non-profit organization that administers the only uniform, independent rating and labeling system for the energy performance of windows, doors, skylights, and attachment products. Our goal is to provide fair, accurate, and reliable energy performance ratings so that:

•  Architects, builders, code officials, contractors, homeowners, and others can compare different products and make informed product choices.

•  Building officials, state government employees, and others involved in code development and enforcement can determine if products meet local codes.

•  Government- and utility-run energy efficiency programs can establish performance requirements and standards.

•  Manufacturers have a fair and level playing field to compare products and an accurate method of showing the energy benefits of new designs or technology.


An energy-efficient product will make your home more comfortable. Whether lowering
your heating costs or lowering your cooling costs, being able to sit next to your window
in the winter or the summer, energy-efficient windows offer many advantages.

Lower Heating Costs

One of the best ways to lower your heating costs is to select an energy-efficient
product. The amount of heat loss through a product is defined by its U-Factor.
The lower the U-Factor, the less heat is lost through the product. The less heat
that is lost through the product, the lower your heating costs.

Lower Cooling Costs

Looking to lower your cooling costs? Look at the product’s Solar Heat Gain
Coefficient (SHGC). This rating, on a scale of 0 to 1, tells you how much heat
gain enters through the product. The lower the value, the less heat gain through
the product into the room. The less heat gain, the lower your cooling costs.

Visible Light

Looking to maximize the amount of light that comes through the window, patio
door or skylight? Look at the product’s Visible Transmittance rating. The higher
the rating, on a scale of 0 to 1, the more light enters the room through the whole
product. This rating takes into account the non-glass portion of the product as well.
Given the same type of glass, a product with a higher visible transmittance will let
more light in through the window or door.

Where do you find these ratings? The NFRC label.

When comparing the energy efficiency of one product to the next, look for the NFRC label.
The energy performance label, developed by the National Fenestration Rating Council
, improves the ability to make product-to-product comparisons of energy
performance. Traditionally there were numerous methods of testing for energy performance, leading to confusion and inconsistency when comparing product energy performance. NFRC certification and labeling simplifies this process.
Importance of Whole Product Performance
Traditionally, energy performance information has focused on just the glass. The NFRC
certification and labeling program tests, certifies and labels the performance of the entire
product: glass, sash or panel and frame. While glass information can be helpful, always
look for the NFRC label when comparing product-to-product energy performance.

A NFRC lable looks like this:

Click here(PDF) to see the performance data of Comfort Ti-Ac we used for our windows and doors.

For more information about NFRC please visit