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Flap ventilation is a common and simple method of ventilating greenhouses. It involves installing flaps or blinds on the side walls of the greenhouse. These flaps can be controlled manually or automatically and allow effective air circulation. By opening the flaps, warm air is exhausted to the outside while fresh air from outside enters the greenhouse. This system is particularly suitable for smaller greenhouses and offers a cost-effective solution for temperature regulation. 

Here, on each side of the roof, a drive opens several individual ventilation flaps in the direction of the ridge as well as the flaps of the adjacent naves.

  • The large opening area allows for good air circulation, ensuring rapid regulation of humidity and temperature.
  • The natural chimney effect ensures a more even temperature throughout the greenhouse.
  • In addition, the model can be adapted to different weather conditions.
  • It can also be connected to a central automated control system.
  • EWA electric drives have up to 2100 Nm of drive power: fewer drives for many flaps; reduced costs and installation work as well as increased light incidence (reduced shadowing), thus increasing production
  • LZG 24 rack and pinion gearbox is the only one on the market that can be used for racks up to 16,000 N. This makes it possible to save on drives and thus significantly reduce costs
  • LZG 20 and LZG 24 rack and pinion gearboxes with ball bearings for low-wear operation and maximum service life
  • Lock coupling portfolio suitable for both drives and gear racks
  • Lock system enables smooth and quiet running even with slight misalignments
  • Continuous consultation with system suppliers for optimal coordination with common Venlo greenhouse manufacturers
  • Calculation and design by Lock team of experts
EWA // PowerDrive EWA // PowerDrive
Control unit Control unit
KKS // Chain coupling KKS // Chain coupling
LZZ // Rack LZZ // Rack
LZG // Rack pinion LZG // Rack pinion
EWA // PowerDrive EWA // PowerDrive
Control unit Control unit
KKS // Chain coupling KKS // Chain coupling
LZG // Rack pinion LZG // Rack pinion
LZZ // Rack LZZ // Rack