Automatic Greenhouse & Polytunnel Door and Window Openers

This device is fully automatic and is powered by expansion of the special liquid under the influence of temperature. The higher the temperature, the greater the expanding fluid in a cylinder, and the more air vents. The lower the temperature, the greater the fluid compressed in the cylinder by closing the window. This device is intended to automate the process of ventilation, leaving you only the most important functions for the growing of crops. Automatic Openers can be found on our online shop. For more info please contact us.