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Canada Greenhouses is one of the largest and oldest online greenhouse dealers. We offer a selection of only the best and highest quality greenhouse kits for sale - greenhouses that have been proven to withstand the harsh Canadian conditions such as heavy snow loads, high winds, and cold temperatures.

Free shipping applies for delivery within Canada. For delivery to the Territories (Yukon, NWT and Nunavut) or remote locations where ground shipping is inaccessible a small fee may apply.

 

 

 

 

 


Automatic Window and Vent Openers

Automatically opens and closes the roof vent / window or the louver window when temperature changes. The opener has a metal cylinder containing a mineral which expands when heated. This pushes a piston that opens the vent. As the temperature cools, the mineral shrinks and a spring closes the vent and resets the piston. The opening and closing of the vent is gradual allowing just the right amount of air flow for cooling.

 

Grandio Automatic Vent Opener
Fits Roof Windows/Vents for all Grandio Greenhouses.


$109.00
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