Automatic, adjustable Window opener with temperature control   

Automatic, adjustable Window opener with temperature control 
Ventilation in the greenhouse is important. Your plants should have the right temperature and therefore it is good to have an automatic window opener.
They work with a liquid expanding in a cylinder when the temperature rises.
Individual setting you decide for yourself at what temperature the window should be regulated.
From 17°C to 23°C
Our bestseller is made in a new design. Opens up to 450mm.
VMAX has simple double return spring. Lifts a maximum of about 7 kg.
Mounts for screwing, which gives longer durability.
Made of stable smooth construction.