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Roof vents with manual openers: Helps regulate airflow and temperature
Product Length (IN): 18
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Alton | Thermofor Classic Roof Vent Auto Opener LED Lighting Roof vents with manual openers:The 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
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