Grandio Auto Roof Window Opener
Works on all Grandio Greenhouse roof vents.
Automatically opens and closes the roof vent 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.
|Product Title||Grandio Auto Roof Window Opener|
|Weight (in lbs)||1.0000|
|Shipping Cost||FREE SHIPPING|
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