Match each item with a statement below.

A. The measurement of the heat loss of a particular window or door assembly.
B. The measurement of how much of the sun's radiation a window or door will block.
C. A measurement of how much light comes through glazing.
D. Helps to control solar gain when extra heat is not needed.
E. Makes use of low-emissivity coatings that block much of the infrared energy and ultraviolet light while allowing in most of the visible light.
F. Is often specified for high-security areas where light is desired but a view is not needed.


A. U-factor
B. Solar heat gain coefficient (SHGC)
C. Visible transmittance (VT)
D. Shading fenestration
E. Spectrally selective glass
F. Glass block

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