Alton | Thermofor Louver Window Opener Piston Replacement estimateend-14 or vibrant flowers even during

or vibrant flowers even during freezing winters

Product Width (IN): 33

If your louver vent no longer opens or responds slowly to temperature changes

side walls

Alton | Thermofor Louver Window Opener Piston Replacement estimateend-14 or vibrant flowers even duringThe 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