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Replacement Black Cylinder - Gigavent - SEF116

Greenhouses

Greenhouses

Cold Frame and Hotbed Gardening

Cold Frame and Hotbed Gardening

$69.99
Out of stock
  • Special Order Only
This is a special order item. Please call 888-784-1722 to place an order.

Ingenious temperature-sensitive device that automatically opens and closes coldframe lids, greenhouse windows and even skylights.

This works throughout the day and maintains a constant interior climate, something impossible to achieve by manual adjustments.

Requires no batteries or electricity. It starts opening between 55-75°F, depending on how you have adjusted the vent.

Strongly recommended for all our glazed season extenders because it dramatically improves plant growth.

Screw directly into polycarbonate panels, wood, or metal frames.

  • Item Model Number: SEF116
  • Shipping Weight: 1 pounds.
Related Content from ourGrowOrganic... for Life!

September 7, 2012 - Charlotte from Peaceful Valley
Use manure to turn a cold frame into a hotbed Warm up your cold frame with help from your friendly neighborhood horse. Horse manure will raise the temperature in a cold frame, and our automatic vent openers will keep the cold frame from over-heating.… read more»
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