Ventilation for Greenhouses – Automatic window opener
Automatic Ventilation opener – Ventilation in greenhouses Offered to your customers that wish a wide range of applications.
✓Windows weight 14 kg ✓5 years warranty ✓None CO2 ✓Thermodynamics cylinder 
Automatic Ventilation opener – Ventilation in greenhouses Offered to your customers that wish a wide range of applications.
✓Windows weight 14 kg ✓5 years warranty ✓None CO2 ✓Thermodynamics cylinder 
Automatic Ventilation opener – Ventilation in greenhouses Offered to your customers who simply want to open their greenhouse window without extraordinary features.
✓Windows weight 14 kg ✓3 years warranty ✓None CO2 ✓Thermodynamics cylinder 
Automatic Ventilation opener – Ventilation in greenhouses Offered to your customers who simply want to open their greenhouse window without extraordinary features.
✓Windows weight 14 kg ✓3 years warranty ✓None CO2 ✓Thermodynamics cylinder 
Automatic Ventilation opener – Ventilation in greenhouses Offered to your customers who simply want to open their greenhouse window without extraordinary features.
✓Windows weight 14 kg ✓3 years warranty ✓None CO2 ✓Thermodynamics cylinder 
Automatic Ventilation opener – Ventilation in greenhouses The piston rod is completely sealed off in an aluminium enclosure. This makes this window opener extremely applicable for dusty environments.
✓Windows weight 13 kg ✓3 years warranty ✓None CO2 ✓Thermodynamics cylinder 
Automatic Ventilation opener – Greenhouse ventilation(jealous window) Offered to your customers who want to give their plants optimal conditions with a jealous window.
✓Windows weight 25 kg ✓3 years warranty ✓None CO2 ✓Thermodynamics cylinder 
Automatic Ventilation opener – Greenhouse ventilation Offered to your customers who want to lift a window up to 24 kg without extraordinary properties.
✓Windows weight 24 kg ✓3 years warranty ✓None CO2 ✓Thermodynamics cylinder 
Automatic Ventilation opener – Greenhouse ventilation Offered to your customers who want to lift a window up to 24 kg with a built-in storm protection.
✓Windows weight 24 kg ✓3 years warranty ✓None CO2 ✓Thermodynamics cylinder 
Automatic Ventilation opener – Ventilation in greenhouses The most powerful window opener on the market. Handles large windows in strong wind.
✓Windows weight 60 kg ✓3 years warranty ✓None CO2 ✓Thermodynamics cylinder 
Standard cylinders Thermodynamic cylinders for all Orbesen Teknik’s Automatic ventilation openers. Find more information here.
✓ Thermodynamic cylinders ✓Push force choose between 80 kg or 225 kg ✓3 year warranty ✓ No CO2 
Thermodynamic cylinders – THERMACT For those who have a special application, it is possible to acquire hydraulic cylinders for special configurations.
✓ Thermodynamic cylinders ✓3 year warranty ✓ No CO2 
Nova Air is DISCONTINUED
Download below fil to get info on sheet: Info sheet English (pdf)
How to ventilate your greenhouse – The 9 Best Automatic Vent Openers
Automatic vent openers are solutions to get ventilation in your greenhouse. Which can be used for windows, cold frames, louvres and sliding doors.
J. Orbesen Teknik ApS has been manufacturing automatic greenhouse vent openers for all kinds of greenhouses since 1981 i.e. more than 30 years. The core technology in the opener is the hydraulic cylinder that contains a plant-based wax. The special designed cylinder containing this wax, works as the greenhouse window openers thermostat, thus there is no need for electrical power supply