Alton | Thermofor Classic Roof Vent Auto Opener Freeze Dryer Recipe Book parking garages

parking garages

10mm thick twin-wall polycarbonate side panels

5" inch square

Select the correct shelf length for your greenhouse configuration

Clean with soapy water

Alton | Thermofor Classic Roof Vent Auto Opener Freeze Dryer Recipe Book parking garagesThe Thermofor Classic Roof Auto Opener is a simple, reliable way to keep your Alton greenhouse properly ventilated, without any manual effort. Designed specifically for Alton greenhouse roof vents, it uses a heat sensitive, oil filled piston that automatically opens the vent as temperatures rise, helping create a healthier growing environment for your plants. As the greenhouse warms, the piston expands and gently lifts the vent. When temperatures