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Charley's Greenhouse
17979 State Route 536
Mt. Vernon, WA 98273
1-800-322-4707
Fax 360-873-8264

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360-428-2626

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360-395-3001

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3236 Thermatic-Vent® (C3336)

Qty.

$19.95

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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