automatische raamopener dubbele veer Man insulating roof: twin-wall polycarbonate sheets

insulating roof: twin-wall polycarbonate sheets retain heat in cold conditions

It also comes neatly presented in an open gift box

certified by Control Union Certifications

strong and resistant to knocks and weather conditions

you can also use it as a dusting powder against diseases and pests

automatische raamopener dubbele veer Man insulating roof: twin-wall polycarbonate sheetsThe automatic roof window opener with double spring regulates the ventilation of your greenhouse window fully automatically, without you having to keep checking it yourself. The system works with a cylinder filled with special wax that reacts to temperature: when it gets warmer in the greenhouse, the window opens; when it cools down, the window closes again. This keeps the climate in your greenhouse better balanced, even when you are not there. It is