Alton | Thermofor Classic Roof Vent Auto Opener Freeze Dryer Recipe Book powerful solution trusted by growers

powerful solution trusted by growers for maximum performance and consistent results

Size is approx

The heavy duty interior columns allow you to mount shelves and garden tools

Clean with soapy water

Alton | Thermofor Classic Roof Vent Auto Opener Freeze Dryer Recipe Book powerful solution trusted by growersThe 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