Alton | Thermofor Classic Roof Vent Auto Opener Freeze Dryer Recipe Book Tool-free panel assembly system for

Tool-free panel assembly system for a streamlined DIY setup

narrow walkways or in a garage

Clean with soapy water

10mm thick twin-wall polycarbonate side panels

Size is approx

Alton | Thermofor Classic Roof Vent Auto Opener Freeze Dryer Recipe Book Tool-free panel assembly system forThe 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