Ventilation types for continous system

Here we illustrate different types of ventilation, of the kind found on buildings, animal sheds or greenhouses.

Butterfly ventilation

[Translate to Englisch:] Schmetterlings-Lüftung
  • On industrial premises, buildings, sheds, greenhouses and similar constructions, one drive system can open up continuous ventilation down either side of the roof.
  • With side ventilation, one drive unit opens a full-length raising-lowering ventilation system or one ventilation flap.
  • Here you will find the ZSG, AZD and EZD ranges of rack & pinion units in operation.

Open-Roof ventilation

[Translate to Englisch:] Cabrio-Lüftung
  • Entire roof can be opened (Open-Roof type C).
  • With roof ventilation, a drive system opens full-length ventilation flaps down both sides of the roof. The drive unit powers several reversing gear units.
  • With side ventilation, one drive opens full-length raising-lowering ventilation or a ventilation flap.
  • These are typical applications for the ZSG, AZD and EZD ranges of rack drives.

Multitunnel ventilation

[Translate to Englisch:] Multitunnel-Lüftung
  • With roof ventilation, one drive system opens a full-length ventilation flap.
  • These are typical applications for the ZSG, AZD and EZD ranges of rack drives.
  • By linking up reversible gear units in series, several tunnels (‘multitunnels‘) can be operated.

Ventilation types for Venlo greenhouses

On this page, we illustrate special-purpose ventilation systems that are used for the Venlo design of Dutch greenhouse.

Flaps ventilation

[Translate to Englisch:] Klappen-Lüftung
  • Here one drive unit on each side of the roof opens several individual ventilation flaps down the primary longitudinal roof beam, as well as flaps in the adjacent sections.
  • This is where you will find the LZG range of gear units in operation, in rail ventilation applications, and the UBL range at work in swing ventilation applications.

Open-Roof ventilation

[Translate to Englisch:] Cabrio-Lüftung
  • Type A as an continous system with central ventilation tube under the primary roof ridge: this is where the ZSG, AZD and EZD ranges of rack drives are used.
  • Type B with push-rod system: this is where the LZG / UBL ranges of rack & pinion unit are used.

Full-length ventilation

[Translate to Englisch:] Durchgehende Lüftung
  • On each side of the roof, a ventilation flap opens along the line of the primary roof ridge. A drive system opens several flaps on adjacent sections of the greenhouse.
  • Here, systems are used with in top of the other as well as adjacent parallel push-rod systems with LZG / UBL rack & pinion units.

Ventilation types for Open-Roof systems

With Open-Roof systems, the roof can be opened almost completely to assure maximum ventilation. With our versatile selection of options for drive units and rack & pinion units, we are able to provide a solution to all Open-Roof variants. The mechanism can be an continous system (Types A + C) or a push-rod system (Type B).

The distinguishing features of the three most commonly used type of Open-Roof ventilation system (Types A – C) are itemized below:

Open-Roof ventilation – Type A as continous system

Typ A
Typ A
  • Drive provided by a ventilation shaft centrally arranged under primary roof ridge.
  • Both sides of roof are moved simultaneously by one drive unit.
  • EWA power drives are used with 1–9 rpm.
  • In conjunction with the ZSG, AZD and EZD ranges of rack & pinion units, optimum closing times can be achieved.

Open-Roof ventilation – Type B as push-rod system

Typ B
Typ B
  • Drive delivered by a push-rod system arranged on the rail mountings (see Fig. on p. 18).
  • Each side of the roof is moved by its own drive unit.
  • The drive units employed are our high-speed EWA power drives, our tried and tested SpeedLogic or our TurboLogic systems.
  • In conjunction with the LZG / UBL ranges of rack & pinion units, optimum closing speeds can be achieved.

Open-Roof ventilation – Type C as continous system

Typ C
Typ C
  • Arrangement of full-length ventilation flaps, same principle as on wide-span greenhouses.
  • The EWA power drive operating at 1–9 rpm is used here. In conjunction with our ZSG, AZD and EZD ranges of rack & pinion units, you obtain an optimum ventilation system.
  • With our reversing gear units, several ventilation flaps can also be grouped together to form a system.