Fresh air supply systems
Optimum fresh air supply for every poultry house
Big Dutchman offers a wide range of fresh air supply systems to ensure optimal provision of fresh air. Depending on the building conditions and the specific requirements of your birds, you can select from a variety of fresh air supply systems that can be used for negative or balanced pressure systems, side or CombiTunnel ventilation:
- fresh air inlets for installation into the wall or ceiling
- fresh air chimneys for negative and balanced pressure ventilation
- large air inlets for tunnel ventilation
The new CL-3-1200 and CL-3-1911/F series
For uniform fresh air supply in the entire poultry house
Big Dutchman’s well-proven fresh air inlets are made from a shock-proof, recyclable, nondeformable and UV-stabilised plastic material. The insulated inlet flap is kept closed by stainless steel springs, thus sealing the building and making it airtight. The inlet flap opens through downward pull. This allows very precise regulation of the inlet opening in response to climatic temperature changes.
The corresponding control set opens the fresh air inlets either all at once or individually. With the patented advanced inlet control (AIC), a single action at each inlet pre-defines which inlets open first and which open later.
Ważne zalety
- 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 from aluminium) so the building is airtight;
- the inlet opening is controlled precisely by strong tension springs: stable air circulation throughout the house, uniform temperatures in the entire house 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 washer can be used without any concern.
CL Flex
The flange inlet for very large poultry houses
CL Flex is available in different widths, allowing the realisation of different air flow rates. Using a counterweight of one kilogram, the inlet opens when the flap is lowered, i.e. no longer pulled close. The inlet’s optimised geometry and the lateral guide plates create stable air jets and deliver good air circulation in the entire room.
During development, special attention was paid to achieving a reliable seal when the inlet is closed. The inlet flap has exceptional aerodynamic properties with a tear-off edge and integrated air guide at the frame, which enables greater air flow stability. The inlet’s size is flexible so it can easily be adjusted to many different building requirements.
Ważne zalety
- ideal supply of fresh air with negative pressure ventilation;
- available in four different sizes to suit various building requirements;
- the inlet is pulled closed to control the opening: stable air circulation throughout the house, uniform temperatures in the entire house;
- an air deflector ensures perfect air flow towards the ceiling;
- a manual advanced inlet control set closes individual inlets;
- the use of high-quality materials ensures a long service life of the inlets;
- a high-pressure washer can be used without any concern.
The ideal accessories for Big Dutchman wall inlets
Useful, effective and sometimes indispensable!
Protective grille against birds
- This pest guard prevents birds and small animals from entering the building through the inlet.
Air deflector
- With the air deflector (also available for the CL-3-1200 and CL-3-1900 series), 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 grille against birds for CL-3-1911/F
- This nozzle significantly reduces the turbulence when the air flows into the inlet, thus ensuring more stable air jets, even with a small inlet opening.
Anti-wind cap
- The anti-wind/anti-weather cap is recommended for houses without eaves.
Light trap
- When used in combination with the anti-wind cap, the light trap reduces the incidence of natural light entering the poultry house, hardly compromising air flow.
Light trap for CL-3-1200 series
- This light trap can be fitted to wall-mounted CL-3-1200 series inlets and is suitable for both breeder and rearing houses. It fully reduces the incidence of light (“dark-out”).
CL 1540
Fresh air inlet for installation in a ceiling below a roof space
The CL 1540 ceiling inlet is made from a recyclable, shock-proof, non-deformable and UV-stabilised plastic material. Where possible, it should be installed into a ceiling that has been insulated. Even with a ceiling inclination of up to 15 degrees, CL 1540 will seal securely, due to the strong, corrosionresistant steel springs that keep the insulated inlet flap firmly closed.
Ważne zalety
- ideal supply of fresh air from the roof space 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 building is absolutely airtight;
- the inlet opening is controlled precisely by tension springs: stable air circulation throughout the house, uniform temperatures while heating requirements remain low;
- fresh air remains at ceiling height for longer: a lower negative pressure is sufficient to ventilate the house efficiently;
- the use of high-quality materials ensures a long service life of the inlets;
- operation is virtually maintenance-free;
- a high-pressure washer can be used without any concern.
Balanced pressure inlet CL 1200-Balance
For installation in the walls of smaller, narrow houses for free range egg production
This special fresh air unit consists of a standard CL 1200 wall inlet, a cowl and a small fan. It is mainly used in houses in which a constant negative pressure ventilation cannot be guaranteed, generally smaller buildings for free range egg production where using fresh air chimneys would not be practical.
The large pop holes used in these houses make it impossible to create a consistent air circulation. The fresh air is therefore pushed into the house by a fan, i.e. the ventilation system works with balanced pressure. Usually, every third wall inlet is a CL 1200-Balance inlet.
Fumus 3
The fresh air chimney for fresh air, mixed air and recirculated air
Fumus 3 is equipped with a fan in the lower part of the chimney as standard. This fan pushes the fresh air drawn in by the chimney through the fresh air distributor and into the building. The butterfly valve above the fan regulates the amount of fresh air entering the house.
The position of the valve controls how much fresh and recirculated air is drawn into the building. The mix can be anywhere between 100 per cent fresh air and 100 per cent recirculated air. With this control system, a designated amount of fresh air is mixed with the house air, as it is drawn in through the 10 cm wide opening at the chimney. This means that the house can be adequately ventilated using fresh air, a mixture of fresh and recirculated air, or just recirculated air.
For minimum ventilation (during the cold seasons or while heating is necessary), Fumus 3 works with balanced pressure or slightly positive pressure. It is available in two diameters: 730 mm and 920 mm.
Ważne zalety
- good ventilation of the house due to the large throwing range, ideal to dry the litter;
- the mixed air creates a constant warm breeze;
- perfect for cold weather because the air flow always guarantees an ideal throwing range, irrespective of the ventilation level (mixed air);
- the fan ensures constant air movement: the CL 74 actuator controls the position of the butterfly valve and creates fresh air, mixed air or recirculated air as required (recommendation: individual control).
F.A.C.
Fresh air chimney for fresh air supply from the roof
F.A.C. supplies fresh air from the roof with a high air flow rate. The fresh air distributor at the lower end of the chimney ensures that the incoming air is distributed evenly inside the house. This creates a stable air flow even with minimum ventilation.
F.A.C. can also be equipped with a fan as an option. This fan pushes the fresh air drawn in by the chimney through the fresh air distributor and into the house to create a balanced pressure system. Such a system is recommended when no negative pressure can be created due to constantly open pop holes. F.A.C. is available in four different diameters of 650 mm, 730 mm, 820 mm and 920 mm.
Ważne zalety
- supply of fresh air from the roof into the centre of the house for optimal mixing with the warm air in the house;
- ideally suited for flat houses;
- excellent value for money.
MultiVent 10 M and 17 M, and SOB 50
Inlets for fresh air supply over a large surface
The 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. During colder periods, the inlet flaps close reliably. The flaps are insulated so temperature losses are minimised.
MultiVent and SOB 50 have the advantage of being very flexible. They use Big Dutchman actuators CL 175 and EWA, which enable good control over the volume of incoming air. Depending on the required dark-out strength, Big Dutchman can offer two different light traps: LameliaBrown (light reduction factor of 6 000 : 1) and LameliaBlack (light reduction factor of 7 100 000 : 1). The light trap segments are made from plastic, extremely durable and easy to clean.
Tunnel door with rack and pinion drive (TD-L)
For large tunnel openings: robust, well-insulated and airtight
The Big Dutchman tunnel door TD-L consists of either 40 mm or 50 mm thick composite boards with a robust plastic coating. The frame and the rack and pinion are made from corrosion-resistant aluminium.
The EWA actuator allows the infinitely variable opening and closing of the tunnel doors to enable the precise distribution of air. A flexible lip seal ensures tight closing with very little force. Total door lengths of up to 40 m are possible.
TD-L is available with heights of 750 mm, 1000 mm, 1200 mm and 1500 mm and can be installed in brick walls or sandwich panels. The maximum opening angle (towards the inside or the outside) is 60 degrees.
Roller curtain
Efficient, cost-effective closing system
Roller curtains are a good option to make the building airtight when the tunnel openings are closed. They fit closely to the tunnel opening because of the negative pressure in the house. As roller curtains are not insulated, they are best suited to warmer regions or as a closure option during colder winter months on free range poultry buildings. Rodents cannot get into the roller curtain because of the winding system, so the curtain remains clean. Big Dutchman offers two winding systems:
Opening from the top
This system is recommended for tunnels that should not open fully from the start. The cooler fresh air will enter the house at the top first, without reaching the birds. A specifically designed telescopic coupling with compensation mechanism ensures no stress is placed on the curtain. Re-adjustments are not necessary.
Opening from the bottom
With this system, the roller tube is not loaded with weight, but instead relies on a motorised winch to wind the curtain open and closed, also preserving the fabric. Winding systems that open from the bottom are available with a fixed drive or a climbing drive, which means a long telescopic tube is not required, even when very high curtains are used.
Actuators
Automatic opening and closing of any fresh air inlet
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 delivered by the CL 175 and EWA actuators offered by Big Dutchman.
