Alton | Thermofor Classic Roof Vent Auto Opener Freeze Dryer Recipe Book Clean with soapy water

Clean with soapy water

powerful solution trusted by growers for maximum performance and consistent results

5" inch square

No more snagging clothes on errant knobs or handles - the smooth front adds another dimension of appeal to the overall style of this piece

10mm thick twin-wall polycarbonate side panels

Alton | Thermofor Classic Roof Vent Auto Opener Freeze Dryer Recipe Book Clean with soapy waterThe 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