Retail: $129.00
Price: $115.00
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This is the strongest vent opener available with a lifting capacity of 65 lbs. It has a hydraulic cylinder which provides superior protection in windy areas. Opening temperature can be adjusted from 56° F to 70° F and maximum opening of 18" is reached at approximately 20° F above opening temperature. Gigavent cylinder can be located in many different positions for maximum mounting flexibility. This model is too large for use with all of our greenhouses except some of the Cross Country models.


  • Adjustable temperature range of 56° F to 70° F
  • Maximum opening of 18"
  • Recommended for vents up to 65 lbs.
  • Equipped with built-in damper for windy locations

How does a Greenhouse Autovent work?
A strong metal tube contains a mineral wax which expands with heat. This pushes a piston which opens the auto vent via a balanced linkage. As the temperature drops, the wax shrinks and a strong spring closes the vent and resets the piston.

Product Manuals, Tips, Specs, & Guides

Gigavent Vent Opener Installation Manual