Window/Vent Opener Greenhouse - Univent® - Orbesen Teknik Denmark - since 1981

Automatic window opener – We believe in high quality products and quality service. J. Orbesen Teknik ApS has focus on window openers for hobby greenhouses and has been the core business since 1981. In those 30 years, we have become the market leader for window openers, and are currently exporting the openers to all over the world. 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. The Univent window opener is a compact and powerful opener. It uses our widely used and well-proven standard hydraulic cylinder that throughout many years on the market has proven its high quality and durability. The Univent window opener is a truly universal opener that has a high degree of versality. The key features that differentiate this opener is: - Its compact design - The innovative Easy-Clip-System - The double-spring design (T