Alton | Thermofor Roof Vent Opener Piston Replacement Partyhouse Current: 10

Current: 10

9 ft 8 in wide x 14 ft long x 8 ft high center

or small vegetable plants

for additional strength and rafter stiffness

Floor-standing milkhouse-style heater

Alton | Thermofor Roof Vent Opener Piston Replacement Partyhouse Current: 10The Thermofor Long Piston Replacement is a direct replacement cylinder designed for Thermofor automatic roof vent openers used in Alton greenhouses. If your current opener is no longer responding properly to temperature changes, replacing the piston is a simple way to restore reliable, automatic ventilation. This heat sensitive cylinder contains a wax core that expands as temperatures rise and contracts as they cool, driving the vent to open and close