It’s all under control - the Rion Roof Vent Automatic Opener automatically controls the temperature in your greenhouse. It’s all thanks to the natural wax, which pushes a piston that expands as the air gets warmer and closes when the optimal temperature is reached. When the air cools, the wax contracts to close the window by use of a spring mechanism. No electricity is required, and the opener is suitable for all Rion greenhouse models.
16L x 3W x 2H in.
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