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Thermatic-Vent®

$19.95
Taxes

Automatic cold frame vent

USES NO ELECTRICITY! Opens and closes by a temperature-sensitive spring mechanism. Range 40ºF to 70ºF. Install one front vent for intake and one high in the back for a warm air exit.

Size: 10" x 18" x 3.5"

Easily installs in an 8" x 16" opening