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This automatic greenhouse vent opener will allow air to circulate through the greenhouse when its hot, and then it closes when the temperature cools

deal for poultry houses, dairy barns, greenhouses and warehouse buildings. Can be mounted vertically or to a 45° angle. Heavy-duty 18 gauge galvanized steel housing. Enclosed with 1" x 2" galvanized wire mesh. Removable screens make cleaning a breeze.

Automatically opens and closes the roof vent/window when temperature changes. The opener has a metal cylinder containing a mineral which expands when heated. This pushes a piston that opens the vent. As the temperature cools, the mineral shrinks and a spring closes the vent and resets the piston. The opening and closing of the vent is gradual allowing just the right amount of air flow for cooling.

Enhance airflow with our Liberty Louver Opener. Opener ensures fully automatic opening and closing of your louver window according to changes in temperature.

Big torque, 24V direct-current, it has a biger loading torque and a greater capacity of film rolling The inner gears are made of high quality pinion steel treated by carburizing, high hardness, no broken of teeth and long service life High quality sealing pad is used for the shell, good aging-resistance and waterproof. Power indicator of double colors is configured to confirm the power and its whirling orientation conveniently.

The roll up motor open a new era of intelligent agriculture, roll up length up to 100m , 3m height. Small size, low noise, easy installation Can side of the roll,also can top roll Excellent reliability ideal for greenhouse ventilation, light wickets and blackout systems Suitable for breeding greenhouses, flower greenhouses, connecting film greenhouses, fruit greenhouses