17-1/2 x 8-1/2 x 6 . Vent opens at 70 deg. and closes at 40 deg. 50 sq. in. net free area per pc. Eliminates excess moisture summer or heat loss winter. Black. Easy to install hardware. Bi-metal coil. more
Black Automatic Foundation Vent Features A Bi-Metal Coil To Open & Close Automatically At A Temperature Of 70 Degrees The Vent Opens To Provide Fresh Intake Air & At 40 Degrees The Vent Closes To Conserve Energy & Protect The Pipes. Black At A... more
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