Premium GigaVent Solar Vent Opener can lift up to 65 lbs
Constructed from long-lasting stainless steel, brass and aluminum.
Adjustable for different opening heights and mountable two different ways, taking up as little space as possible within your greenhouse.
The volume-expanding wax within the hydraulic cylinder will endure any temperature hot or freezing , working independently of the power grid for continuous temperature monitoring.
Recommended for use in temperatures up to 140 deg F.
2 year manufacturer warranty.
Note - It is recommended the vent cylinder be removed during the winter months.