Energy Performance Ratings for Windows, Doors, and Skylights
It provides a gauge of the relative efficiency of different glass or glazing types in transmitting daylight while blocking heat gains. The higher the number, the more light transmitted without
Understanding solar heat gain coefficient and energy efficiency
U-value measures a window''s rate of heat loss, or how much heat your home loses through the window. Like the solar heat gain coefficient, it''s depicted as a number
Residential Windows, Doors, & Skylights
In colder climates, the ideal window for a South-facing wall has a higher solar heat gain coefficient (SHGC) and a low U-factor to reduce heat loss. Windows that face East and West should have
Guide to Energy-Efficient Windows
When purchasing ENERGY STAR qualified windows, look for the U-Factor and the Solar Heat Gain Coeficient (SGHC). The U-Factor measures how well the window in-sulates.
National Fenestration Rating Council | NFRC is the leader in
The circled value shows you the rating a specific door has received based on its glass configuration. Each rating is split into two values: Solar Heat Gain, and U-Factor.
ENERGY STAR Program
Understanding the energy performance numbers will help you select the right glass package to achieve maximum results for your home. If you''ve already purchased windows, the NFRC
Independently Tested and Certified Energy Performance
Solar Heat Gain Coefficient (SHGC) measures the fraction of solar energy transmitted and tells you how well the product blocks heat caused by sunlight. SHGC is measured on a scale of 0
Solar Heat-Gain Coefficient Ratings for Windows
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Performance value terms
Solar Energy Direct Transmittance (Te, %) is the percentage of incident solar energy in the wavelength range of 300 nm to 2500 nm that is directly transmitted by the glass.
Solar Heat-Gain Coefficient Ratings for Windows
The amount of solar radiation that can pass through a window or skylight can be measured in terms of its solar heat-gain coefficient, or SHGC. SHGC ratings are used to help in quantifying
Building Energy Performance Criteria Terms and References
The amount of visible light (390 to 770 nanometers within the solar spectrum) that passes through the glazing material of a window, expressed as a percentage of the total incident radiation in