Alton | Thermofor Classic Roof Vent Auto Opener LED Lighting Buyers focused on entry-level or

Buyers focused on entry-level or budget greenhouse options

create an emergency food supply

and other items

The Janssens Side Window Fly Screen is an optional addition to your push open / tilt out side window in your Janssens greenhouse

lounge and even work while taking in your natural surroundings

Alton | Thermofor Classic Roof Vent Auto Opener LED Lighting Buyers focused on entry-level orThe 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