Fresh air supply systems
Big Dutchman offers a wide range of fresh air supply systems to ensure optimal provision of fresh air. Depending on structural conditions and special requirements – high-velocity ventilation, diffuse air, negative or balanced pressure – the following systems can be implemented:
- fresh air inlets for installation into the wall or ceiling;
- perforated air channel and DiffAir ceiling;
- fresh air chimneys.
CL 1200, CL 1211 F, CL 1200 B/F, CL 1911 F, ZEW Polar
The wall inlets of the CL series are made of shock-proof, recyclable, non-deformable, UV-stabilised plastic and can easily be cleaned with a high-pressure cleaner.
The insulated inlet flap is kept in a closed position by rustproof steel springs, thus sealing the building airtight. The inlet flap is pulled open. This allows the farmer to regulate the inlet opening very precisely in each season. As an example from the winter season: the cold, outside air enters the building, immediately combining with the warm, inside air. This process helps create a more comfortable climate for the animals and can easily be managed with a control set. This control set opens the fresh air inlets either all at once or individually.
The ZEW Polar 1300 wall inlet is made of polyurethane rigid foam – a very stable material with good insulating properties. The inlet can be easily cleaned with a high-pressure cleaner. The inlet flap of the ZEW Polar 1300 stays in line with its frame when open.
Thanks to this special feature, the cold fresh air and the warm, humid house air only meet in areas outside the inlet. The flap therefore opens and closes reliably, even at very low temperatures, and less ice forms.
CL 1540 and ZED 5000
The CL 1540 is a multi-purpose ceiling inlet. The materials of this inlet are made of recyclable, shock-proof, non-deformable and UV-stabilised plastic. Rustproof steel springs keep the insulated inlet flap closed.
The ZED 5000 inlet is made of polyurethane and is equipped with a flange so it can be fastened to the ceiling. This inlet can produce very high air rates and is therefore especially well suited for additional summer ventilation when combined with a DiffAir ceiling (combi-diffuse ventilation).
Perforated air channel
Due to their modular design, perforated air channels are suitable for nearly every house type with an inserted ceiling below the attic. They are available in five different widths and consist of heat-insulated polyurethane (PU) plates. The individual hole pattern of the perforated plate ensures optimum fresh air ventilation throughout the house.
Furthermore, this system guarantees an ideal adaptation to maximum summer air temperatures or conditions. The PU plates can also be used as partially or completely perforated ventilation ceilings.
DiffAir ceilings consist 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. They serve both as a diffuse air supply system and economical ceiling insulation, consisting of specially treated glass wool. Two layers of the glass wool are provided, permeable to airflow.
An additional layer of fleece between the glass wool and the DiffAir plate acts as a water repellent. Fresh air enters uniformly along the entire ceiling for an even distribution while ensuring the maximum permitted air speed in the animal area.
FAC 2 (Fresh Air Chimney)
The FAC 2 fresh air chimney draws fresh air from the rooftop and distributes it evenly throughout the barn. The stable pipe system is GRP coated on both the inside and the outside, and is insulated with 30 mm of polyurethane. This gives the chimney a long service life and makes cleaning easier. FAC 2 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 entering air is distributed evenly inside the house. This creates a stable airflow even with minimum ventilation.
FAC 2 is available with central or individual control. For individual control, the actuator is installed directly in the chimney. Central control of multiple chimneys is carried out with only one actuator via cables and tension rods.
As pigs are very sensitive to draughts, a recirculation unit including a fan is a standard feature of FAC 2. This unit distributes cold incoming air more evenly in the house, especially in winter.