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Automatic Rion Roof Vent Opener

Please note - despatched direct from the manufacturer please allow 7-10 days for delivery.
Designed speciifically to fit the roof vents of the Rion Greenhouses and Lean-to's, this Automatic Window Opener will open and close according to the temperature. 
Fully Automatic - Opens your roof vent as the temperature rises maximising ventilation and air circulation.

Fully Adjustable - Has an adjustable temperature range of between 15 and 25 degrees celcius.

Easy to Fit - Simply remove the existing window stays and attach the fittings into the pre-drilled holes on the vent framework with the screws supplied.

Fits Flush - Sits parallel to the greenhouse roof when closed so nothing hangs down to bang your head.

Durable - Finished with a black powder coating for a long life.

Designed specifically for the Rion range of greenhouses.

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How it Works.
The stainless steel cylinder contains a temperature sensitive mineral wax that expands as the temperature rises. This increases the pressure inside and pushes out a steel pin that is connected to arm of the opener.This arm then opens the roof vent. As the temperature drops, the wax contracts and allows the vent to close.