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Charley's Greenhouse
17979 State Route 536
Mt. Vernon, WA 98273
Fax 360-873-8264

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3236 Thermatic-Vent® (C3336)



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 warm air exit. Size: 10" x 18" x 3.5". Easily installs in 8" x 16" opening.

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