A stronger automatic opener for larger and heavier roof windows. The thermal cylinder senses the temperature in the greenhouse and opens or closes the window automatically, without electricity and without batteries.
- Lifting force up to 12 kg, for larger windows and flaps
- Works automatically based on temperature, without electricity
- Adjustable opening temperature
- A robust metal version for a long service life
Also suitable for ripening during heatwaves, when regular ventilation is crucial for healthy plants.