Grandio Greenhouses Automatic Greenhouse Roof Vent Opener


Grandio Greenhouses Automatic Greenhouse Roof Vent Opener by Grandio Greenhouses at Sun Light Village. MPN: GRA-AUTO. Hurry! Limited time offer. Offer valid only while supplies last. 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.Opens roof vent automatically as temperature warms for air circulation and heat relief, Closes when


4.1 out of 5 stars with 21 reviews
Condition: New
Availability: In Stock
$79.00


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Product Description & Reviews

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.Opens roof vent automatically as temperature warms for air circulation and heat relief, Closes when

 


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