Understanding Visible Transmittance for Replacement Windows: The Importance of a Higher Score and How This Affects Your Home

Understanding Visible Transmittance for Replacement WindowsOne of the major performance rating categories listed on an NFRC label is Visible Transmittance (VT). This category measures how well a window is designed to let daylight into a home. The rating score for visible transmittance ranges from zero to one, and most homeowners look for a higher number because this means that their homes will get more natural light.

To give some perspective, think about a tinted window in a car. This kind of window might have a visible transmittance score of 0.1 or lower, whereas crystal-clear, uncoated glass might have a visible transmittance score of as high as 0.9. Most of the energy-efficient replacement windows that are manufactured nowadays have a visible transmittance score of between 0.5 and 0.7—enough to let plenty of sunlight into your home, but not so much that it bleaches the fabric on your furniture and drapes and makes your home overly hot.

Sunrise Windows offers a wide selection of glazing options for their replacement windows so you can choose the level of visible transmittance that is right for you. In addition to gas-filled dual pane glazing systems, we also offer colored and patterned glass options so you can design windows that reflect your personal tastes. All of the glass packages in our replacement windows meet or exceed ENERGY STAR standards and will provide you with the utmost comfort and energy efficiency while allowing your desired amount of sunlight to filter into your home.

Learn More

For more information about how a replacement window’s visible transmittance rating can affect your home’s energy performance, click here to locate a Sunrise Windows dealer in your area.

Before You Buy New Windows...

GET THE FACTS! Learn Everything You Need to Know About Vinyl Replacement Windows

Eight critical areas you must know before you make a choice

Learn about the most important efficiency number of all

Learn why buying is about much more than a piece of glass