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GlossaryVT |
abbr. visible light transmittance
A metric of the amount of visible light that passes through the glazing material of a window, door, or skylight. VT theoretically varies between 0 and 1, but most values among double- and triple-pane windows are between 0.30 and 0.70. The higher the VT, the more light is transmitted.
Variants: VLT, Tvis
Related resource: The Future of Window Technology . . . Is Here!; Windows and Occupant Comfort
