Palram - Canopia | Automatic Roof Vent Opener for Palram - Canopia Greenhouses HG7308 2 tier provisions of shelves

2 tier provisions of shelves (shelves are not included)

large trays

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Palram - Canopia | Automatic Roof Vent Opener for Palram - Canopia Greenhouses HG7308 2 tier provisions of shelvesThe Automatic Vent Opener was designed to automatically control the temperature in all Palram Canopia Greenhouses. As the air inside the greenhouse warms, the vent gradually opens to allow the correct amount of airflow into the greenhouse and closes when the optimal temperature is reached. The vent arm was designed with the use of natural wax that expands to push a piston, which raises the window, as the air gets warmer then contracts as it cools,