Palram-Canopia Automatic Roof Vent Opener for Most Canopia Greenhouses height_67-56 Smooth operating full extension ball-bearing

Smooth operating full extension ball-bearing drawer glides

Manufacturer: Palram-Canopia Manufacturer SKU: HG9100 Manufacturer UPC: 763552700810 10-Year Limited Warranty

This system is easy to install

Protective soft-holding steel hooks

Weather-resistant Fabric Canopy: This pergola features a Tan weather-resistant adjustable sling fabric canopy that provides shade from the sun

Palram-Canopia Automatic Roof Vent Opener for Most Canopia Greenhouses height_67-56 Smooth operating full extension ball-bearingThe Automatic Vent Opener was designed to automatically control the temperature in Palram Canopia Greenhouses. As the air inside the greenhouse warms, the vent gradually opens to allow the correct amount of air flow into the greenhouse and closes when the optimal temperature is reached. The vent arm was designed with the use of natural wax that expand to push a piston, which raises the window, as the air gets warmer then contracts as it cools, closing