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Photo of Automatic Vent Opener, Greenhouse Supplies


Automatic Vent Opener


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SKU: 70011-00-00

Protect your greenhouse, cold frames and tunnels from overheating!
This automatic vent opener is a great way to insure your plants do not over heat in you greenhouse or cold frame. Easily attaches to most greenhouse vents and cold frames to automatically open when it gets to warm inside. The opener operates automatically and can be adjusted to open at temperatures between 60-77° F. No batteries or electricity needed.



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The Harris Seeds company began its catalog operation in 1879. It evolved from the efforts of Joseph Harris who became extremely successful in the selection of superior strains of vegetables and grains. The company became wildly popular because of his basic business philosophy - "Offer my customers a quality product at a fair price and they will return."


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355 Paul Rd.
P.O. Box 24966
Rochester, NY 14624

Phone: (800) 544-7938
FAX: (877) 892-9197

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