Bayliss Autovent Opener brand_rootcubes 1 Belt 3-Glv Gold Star

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Bayliss Autovent Opener brand_rootcubes 1 Belt 3-Glv Gold StarThis non electric roof vent opener is simple to install and is completely automated. A threaded adjuster bolt can set the Bayliss to start opening the vent at approximately 55 degrees Fahrenheit. This vent opener uses a very simple principal Special waxes have an expansion rate of about 18% when heated by the sun. As the air in the greenhouse heats up it also heats the powertube in the vent opener. As the wax expands it pushes out a stainless steel