Automatic Roof Vent Arm Opener for Rion Greenhouses grey DIY Assembly: Sliding panel system

DIY Assembly: Sliding panel system includes pre-drilled profiles

Helps regulate temperatures

A hinged door can be assembled as a right or left-hand door

2cm diameter gutter heads included

When paired with the roof vent

Automatic Roof Vent Arm Opener for Rion Greenhouses grey DIY Assembly: Sliding panel systemAutomatic 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