Understanding Your Colorado Window’s Performance


Welcome to Ameritech Windows, the premier full-service impact window contractor serving Greater Denver. We have been providing superior window performance to our clients for over 20 years and have earned a 5-star rating along the way. We are fully insured and our team of dedicated professionals has the expertise to guide you through every step of the window installation process.

At Ameritech Windows, we believe that understanding window performance is essential to making the best choices for your Denver home and family. We rely on our years of experience to help you understand the key factors that determine window performance, such as U-Factor, Solar Heat Gain Coefficient, Visible Light Transmittance, and Air Leakage.

Understanding Window Performance


The U-Factor, or U-Value, is a measure of the rate of heat transfer through a material, such as a window. The lower the U-Factor, the better the window is at insulating against heat loss. U-Factor is measured on a scale from 0.20 to 1.20, and Ameritech Windows provides windows with U-Factors as low as 0.18 to help you maximize your energy savings.

Solar Heat Gain Coefficient (SHGC)

The Solar Heat Gain Coefficient (SHGC) measures the amount of solar radiation that is allowed to pass through a window. The lower the SHGC, the less solar heat is transmitted through the window, keeping your home cooler in the summer. Ameritech Windows provides windows with SHGC ratings as low as 0.25 to help you keep your home comfortable all year long.

Visible Light Transmittance (VLT)

Visible Light Transmittance (VLT) measures the amount of visible light that is allowed to pass through a window. The higher the VLT, the more natural light is allowed in, making your home brighter and more inviting. Ameritech Windows provides windows with VLT ratings as high as 0.68 to help you bring the outdoors in.

Air Leakage

Air Leakage measures the rate of air infiltration through a window. The lower the air leakage rating, the less air is allowed to escape through the window, helping you conserve energy and reduce your utility bills. Ameritech Windows provides windows with air leakage ratings as low as 0.03 to help you save money and energy.

At Ameritech Windows we understand that the performance of your windows is essential to the comfort and energy efficiency of your home. That’s why we only offer high-quality windows with superior U-Factors, SHGC, VLT, and Air Leakage ratings. Our team of dedicated professionals is here to help you make the best choice for your home and family.

Contact us today to learn more about how our windows can help you maximize your energy savings and make your home more comfortable.


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