Description
Holds up to 250 Lb
50W solar panel
all made from quality western red cedar
Ample interior space allows for flexible use
Alton | Thermofor Classic Roof Vent Auto Opener Shelf Holds up to 250 LbThe 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