Fresh air inlet for installation in a ceiling below attic

The CL 1540 ceiling inlet is made of a recyclable, shock-proof, non-deformable and UV-stabilised plastic material. Ideally installed into a ceiling that has been insulated, the CL 1540 is designed to close reliably even with a ceiling inclination of up to 15 degrees due to rust-proof steel springs that keep the insulated inlet flap closed.

Fresh air enters the barn through the attic, which makes it necessary for the roof to be insulated, preventing heat build-up in hotter climates. The inlet flap opens through downward pull, which allows control of the amount of incoming air. The air always flows along the ceiling – which should be as barrier-free as possible – whether the inlet is opened fully or only slightly. With the corresponding control set, the ceiling inlets are either opened all at once or individually.

Technical

  • Because the air “sticks” to the ceiling, the negative pressure required even for large throwing ranges is low
  • Inlet flap is shaped like a large shovel; flaps can be opened further than the standard 100% position (parallel to the floor)

Advantages of CL 1540

  • Ideal supply of fresh air from the attic with negative pressure ventilation
  • Very versatile and long service life
  • 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
  • Operation is practically maintenance free
  • High-pressure cleaner can be used without any concern

Discover Our Other Products

All
Egg Production
Pig Production
Poultry Production
AirMaster-V130-1553x545
AirMaster 130 / 130C
AirMaster fans of the V130/VC130 series are mostly mounted in the gable for tunnel ventilation. Their metal housing has a long-lasting zinc-aluminium coating. The specially shaped blades are made of glass-fibre...
Read More
axial-1553x545
Axial fans
Axial fans are ideally suited for incorporation into walls. Their frame has an aerodynamic shape and is made of stable plastic or corrosion-resistant metal. The blades are made of aluminium in a moulded...
Read More
csm_Stallklima-Pig-climate-control-CombiTunnel-Ventilation-Big-Dutchman_8b2e1493bf
CombiTunnel ventilation
Over the years, the CombiTunnel ventilation system developed by Big Dutchman has consistently shown its efficacy. Regardless of your pig farm’s location on the map, it ensures perfect climate conditions...
Read More

Office Details

Office Hours

Visit Us

Contact Us

"*" indicates required fields

Name*
This field is for validation purposes and should be left unchanged.

Our Latest Projects

All
Egg Production
Pig Production
Poultry Production
IMG_5958 - Copy (1)
Turnkey Piggery - South Africa
Big Dutchman Southern Africa is proud to present one of our most innovative turnkey piggery projects — a 600 sow unit designed as a complete farrow-to-finisher system. This project showcases the very best...
Read More
WhatsApp Image 2025-08-19 at 09.12
30,000-Broiler Turnkey House - Zimbabwe
Big Dutchman Southern Africa recently completed a turnkey broiler project in Zimbabwe, consisting of a single house designed to accommodate 30,000 birds. This project covered the full construction of the...
Read More
IMG-20250801-WA0037
Turnkey Layer Farm - Harrismith, South Africa
Big Dutchman Southern Africa is proud to present an ongoing turnkey layer project in Harrismith, consisting of six modern layer houses, each designed to accommodate 30,000 birds, bringing the total capacity...
Read More