Fresh air supply systems

Важливі переваги

• ideal supply of fresh air with negative pressure ventilation;
• advanced inlet control creates stable air jets, especially with minimum ventilation;
• strong tension springs close the insulated and non-deformable inlet flap (integrated profile made of aluminium) so the barn is absolutely airtight;
• exact control of the inlet opening thanks to strong tension springs: stable air circulation all the way to the centre of the barn, uniform temperatures in the entire barn while heating requirements remain low;
• the use of high-quality materials ensures a long service life of the inlets;
• very versatile application;
• a high-pressure cleaner can be used without any concern.

Protective grid against birds

• This grid stops birds and small animals from entering the barn through the inlet.

Air deflector

• With the air deflector, the direction of the air flow can be adjusted individually for each building, simply by changing the angle between deflector and wall. 

Intake nozzle with protective grid against birds 

• This nozzle significantly reduces turbulence when the air flows into the inlet, thus ensuring more stable air jets, even with a small inlet opening. 

Fly protection

• To stop flies and other insects from entering the barn, thus reducing the transmission of pathogens through incoming fresh air, Big Dutchman offers the fine-meshed fly screen for the CL 1200 series. 

Важливі переваги

• ideal supply of fresh air from the attic with negative pressure ventilation;
• very versatile;
• advanced inlet control creates stable air jets, especially with minimum ventilation;
• strong tension springs close the insulated inlet flap so the barn is absolutely airtight;
• exact control of the inlet opening thanks to tension springs: stable air circulation all the way to the centre of the barn, uniform temperatures while heating requirements remain low;
• because the air “sticks” to the ceiling, the negative pressure required even for large throwing ranges is low;
• the use of high-quality materials ensures a long service life of the inlets;
• operation is practically maintenance-free;
• a high-pressure cleaner can be used without any concern.

CombiDiffuse ventilation is a combination of two ventilation systems. With low outside temperatures, fresh air is supplied through the DiffAir ceiling. The fresh air enters throughout the entire ceiling, very evenly and at a low speed.

With high outside temperatures, the ceiling inlets are automatically opened by the 307pro or 310pro climate computer. This effect causes the air to enter the barn at a much higher speed. The animals then feel much more comfortable with the perceived lower temperatures created by higher air speeds.

The DiffAir ceiling serves both as a diffuse fresh air supply system and economical ceiling insulation. It consists of glass-reinforced plastic (GRP) trapezoidal or aluminium sheets. Aluminium sheets have the advantage of being incombustible. DiffAir ceilings are installed at a height of 2.40 to 3 m.

The insulation consists of specially treated glass wool. Two air-permeable layers of the glass wool are provided, with an additional layer of non-woven fabric between the glass wool and the DiffAir plate acting as a water repellent.

F.A.C. 2 consists of a stable pipe system that is GRP coated on the inside and the outside. The pipe is well insulated with 30 mm of polyurethane. F.A.C. 2 is easy to clean, has a long service life and is available in four diameters (650, 730, 820 and 920 mm).

The fresh air distributor at the lower end of the chimney ensures that the incoming air is distributed evenly inside the barn. This creates a stable air flow even with minimum ventilation. F.A.C. 2 is available with central or individual control.

For individual control, the CL 175 actuator is installed directly at the chimney. Central control of multiple chimneys requires just one actuator and uses cables and tension rods.

Our MultiVent inlets are characterised by a very high air flow rate. They can be used as air inlets for tunnel ventilation or for additional summer ventilation. Air flow and air direction can be controlled easily.

In the winter, the inlet flaps close reliably. The flaps are insulated so temperature losses are minimised. For warmer regions, a non-insulated version of the inlet flap is also available.

MultiVent and SOB 50 have the advantage of being very flexible. Using the Big Dutchman actuators, these inlets also allow very good control of incoming air volume.

While each of the motor-driven SOB 50 shutters has its own small actuator, the amount of air entering through the MultiVent inlets is controlled by a central CL 175 or EWA actuator.

Using drop curtains is a simple but very effective method for controlling the natural air exchange in a barn. Our EWA actuator automatically opens and closes the curtains.

Roller curtains are a well-proven closing system. Thanks to the winding mechanism, the curtain is perfectly protected while wound up: there is no room for rodents, the curtain stays clean and its service life increases.

Especially with lower temperatures in the mornings and to prevent draughts, curtains should always open from the top to the bottom. The cooler fresh air will enter the barn at the top first, without reaching the pigs.

There is no stress on the curtain thanks to the compensation mechanism of the telescopic coupling. Re-adjustments are not necessary.

Actuators of a high quality are absolutely necessary for reliable fresh air distribution. They control the flap position of any fresh air inlets, whether these are wall or ceiling inlets, fresh air chimneys, tunnel doors or roller curtains.

Essential requirements such as functional reliability and robustness are met perfectly by the CL 175 and EWA actuators offered by Big Dutchman.