How does it perform in wind and weather

Low-Medium-High heat settings

625"wide X 71

Size is approx

Alton | Thermofor Louver Window Opener Piston Replacement PLASTIC ARM CHAIR How does it perform inThe Thermofor Louver Vent Replacement Cylinder is designed to restore smooth, automatic operation to your greenhouse louver vent opener. Compatible with Thermofor, Robinsons, and Alton branded louver openers, this replacement cylinder helps maintain proper airflow and temperature control without manual adjustment. Inside the cylinder is a heat sensitive wax core that expands as temperatures rise and contracts as they cool. This natural movement powers