Automatic Roof Vent Arm Opener for Rion Greenhouses grey When paired with the roof

When paired with the roof vent

This unit can be moved easily for the changing seasons

hinged double doors that are high (6'6") and wide

DIY Assembly: Sliding panel system includes pre-drilled profiles

Automatic Roof Vent Arm Opener for Rion Greenhouses grey When paired with the roofAutomatic Roof Vent Arm Opener Automatic Climate Control for EcoGrow, Prestige and Grand Gardener Greenhouses ONLY The Automatic Vent Opener for Rion Greenhouses, was designed to automatically control temperature and humidity levels. As the air inside your Rion Greenhouse warms, the vent gradually opens to allow the correct amount of air flow into the greenhouse and closes when the temperature cools. All you need to do is to install it on your roof