Grandio Automatic Window Opener

Regular price $ 89.00

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Description

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.

Features

Automatically opens and closes your greenhouse roof vent as temperatures rise and fall — no electricity required
Heat-powered piston responds to temperature changes inside the greenhouse
Helps prevent overheating and improves air circulation
Simple installation on most greenhouse vent windows
Adjustable opening temperature range

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