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17979 State Route 536
Mt. Vernon, WA 98273
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3515 Univent Automatic Vent Opener (C3515)

Expected in stock approximately the first week of October.



Quantity pricing:
2 or more $44.95 each

This item is temporarily on back order. You may still order the item. Your credit card will not be charged until the item ships. Details about Back Orders.

Mulitple uses

This unique solar vent control will open and close roof vents, a cold frame lid, top-hinged wall vents, or even the greenhouse door. It features two closing springs for extra strength. The Univent solar vent opener is the only solar-powered control with a quick-release mounting bracket. Just grasp the “clutch” arm and squeeze for easy detachment. This allows a cold frame lid to be fully opened for access to the plants.

The solar-powered cylinder can be adjusted in 1° F increments for opening temperatures between 60° F and 77° F. Full opening of 18" is reached at 86° F. Lifting capacity is 15 lbs. Installation is simple using the mounting clamps for aluminum vents, or screw directly to a wooden frame-work. Materials are corrosion-resistant aluminum and stainless steel.

Note: Cylinder should not be allowed to freeze. Freezing can compromise the seal, causing it to break and leak, which will render the mechanism inoperable.

See Also
3513 Replacement Cylinder for 3515,3527,3533 (C3513)

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