AutoVent Automatic Shelter Vent Kit

Regulate the internal temperature of your garage or shelter easily with this fan / ventilation. It keeps your shelter cool and dry with auto vent, the ultimate ventilation system for your shelter. Vent automatically opens and closes based upon the interior temperature. Adding the vent to your building makes eliminating humidity and moisture buildup in your fabric garage or shelter easier than ever. A bimetallic spring, which is heat sensitive, begins to open the vent at 74 degrees, fully opened at 104 degrees. When the interior temperature cools down, the vent closes.