Automatic Ventilation opener – Ventilation in greenhouses

Universal greenhouse window opener

  • Ventilation - Univent
  • Ventilation - Univent
  • Universal solar powered window opener
  • Universal solar powered vent opener
Ventilation - Univent Ventilation - Univent Universal solar powered window opener Universal solar powered vent opener

As a reseller, it is important to know the product’s properties before launching the product on the market. The main element of all Orbesen Teknik’s products is that it is a self-working ventilation opener which is handmade by Danish labour and ensures the correct temperature in your customer’s greenhouse. Which also means that your customer doesn’t have to think about open the window in their greenhouse.

Properties of the product

Univent® is offered to your customers that wish a wide range of applications for:

  • Windows in greenhouses
  • Vertical doors in greenhouses (is not included in our standard packaging)
  • Cold frames
  • Sliding doors

The product is designed with an “Easy-clip” system that allows your customer to disconnect one end of the arms with just a little bit of hand force. Which gives access to the applications above.

Univent® is equipped with 2 springs, which allows the ventilation to be closed and 2 springs gives a stronger closing force. However, as a wholesaler, it is possible to optimize the springs power with either a “strong spring” or “extra strong spring”. Which gives an even stronger closing force for your customers application. We recommend this greenhouse ventilation, for greenhouses which is produced in polycarbonate, as it is a lightweight window. It is possible for your customer to adjust the temperature for the window opening on the cylinder, if a previous or later opening desired between 17 °C and 30 °C. Thermometer on the cylinder can be purchased.

The opener is designed to be used all year. However, ventilation opener in the winter must be ensured, if your customer is using a heat source inside the greenhouse or perhaps in stormy weather. Your customer can ensured the ventilation opener with the security belt and your cutomer must remember to unscrew the cylinder when using the security belt. Make your customer aware that the cylinder can withstand freezing weather.

Window weight
14 kg
Opening force (a)
7 kg
Standard closing force (a)
0.8 kg
Temperature range, opening
17 – 25 ºC
Maximum window opening at
30 ºC
Maximum opening
45 cm
Standard color (b)
Metallic (untreated)

a) Depending on the type of springs installed.

b) You can also choose Black color and custom colors are available for an additional cost.

Ventilation opener Univent® 

On the pictures you can see Univent®, which is “twin” with Univent® Black. The product is equipped with an opener and a thermodynamics cylinder, which has been designed to lift a 14 kg window.


The moving parts of the opener and cylinder must be lubricated with a light oil (olive oil) once a year.


2-year warranty for end-user and 5-year professional warranty are valid from the date of purchase.

Manual guide and installation video 

In the ventilation openers delivery, a manual guide is provided and Orbesen Teknik offer a free installation video with own logo for your company’s website.


Ventilation openers are delivered in styrofoam and closed with a cover, either Orbesen Teknik’s own cover or there is the possibility getting own cover. However there are some specific requirements.

If you want a collaboration, you can fill our the form at the top or send an email to


For Professionals/B2B
For Professionals/B2B


Please contact us

Phone: (+45) 59 65 17 17

Monday-Thursday: 8:00 am – 16:00 pm

Friday: 8:00 am – 14:00 pm