Vitavia Thermovent automatic window regulator

The automatic window openers ensure the automatic opening and closing of your greenhouse windows, without electricity and with precision. The plant-based wax inside the cylinder expands depending on the temperature, pushing the window open by up to 45 cm. The temperature range can also be set and adjusted for summer and winter time. The aluminum lifters are easy to install in the roof window without drilling, available in various colors, and compatible with all common greenhouse brands.