How it works
Tunnel ventilation in a poultry house
In a tunnel-ventilated shed, exhaust fans at one end pull air along the length of the house. The air enters through cellulose cooling pads at the other end, where evaporation cools it before it passes over the birds.
The steady air speed takes heat away from the birds, while the pads lower the air temperature. Together they reduce heat stress, which shows up as lower feed intake, slower growth, fewer eggs and losses on very hot days.
The system
What a poultry cooling system includes
54 inch exhaust fans
Drop hammer fans, 1380 mm, moving 44,000 m³/h each. Made in India with SS-304 blades and a 1.2 mm body; belt drive or direct drive.
Cellulose cooling pads
7090 or 5090 grade, 100 or 150 mm thick, made in our own factory with above 80% cooling efficiency.
PVC or aluminium pad framing
Frame, top water pipe, gutter, tank, pump and filter. Our PVC frame is the first made in India.
Controls and spares
Fan controllers, motors, blades and pumps from one supplier.
Sizing
How many fans and how much pad?
Fans are sized on air speed through the shed. The usual target in tunnel mode is about 2.5 m/s across the shed's cross-section, so a shed 12 m wide with an average height of 3 m needs about 12 × 3 × 2.5 × 3,600 = 324,000 m³/h, or eight 54 inch fans.
Pad area is then sized so air passes through the pads slowly enough to cool: about 1.8 m/s for 150 mm pads, or 1.25 m/s for 100 mm pads. Our poultry fan and pad calculator does the arithmetic; we confirm it with your shed drawing.
Recommended products
Products for poultry houses
Direct Drop Hammer Exhaust Fan 800 mm
XD80 · 0.37 kW · 18,000 m³/h
Direct Drop Hammer Exhaust Fan 1000 mm
XD100 · 0.55 kW · 23,000 m³/h
Direct Drop Hammer Exhaust Fan 1380 mm
XD138 · 1.1 kW · 44,000 m³/h
Drop Hammer Exhaust Fan 800 mm
XH80 · pulley driven · 18,000 m³/h
Drop Hammer Exhaust Fan 1000 mm
XH100 · pulley driven · 23,000 m³/h
Drop Hammer Exhaust Fan 1380 mm
XH138 · pulley driven · 44,000 m³/h
Evaporative Cellulose Cooling Pads
5 / 6 / 7 mm flutes · custom sizes
PVC & Aluminium Pad Framing
100 mm and 150 mm
Cooling Pad Production Line
Complete pad-making machineryGood practice
Getting tunnel ventilation right
Seal the shed well, because air leaking in through gaps bypasses the pads. Keep pad water clean and filtered, run the pump before the fans on hot afternoons, and clean pads and fan shutters between flocks. Belt-driven fans need belt checks; direct-drive fans avoid that.
Projects
See our installations
We have installed industrial coolers, ducting, HVLS fans and exhaust fans for factories, warehouses and farms across India. See our projects, or ask us for a reference site near you.
FAQ
Common questions
Which exhaust fan is best for a poultry farm?
The 54 inch (1380 mm) drop hammer exhaust fan is the standard for tunnel-ventilated poultry houses, moving 44,000 m³/h per fan.
How many fans does a poultry shed need?
Multiply the shed width by its average height, by the target air speed (about 2.5 m/s) and by 3,600 to get m³/h, then divide by the fan airflow. Our calculator does this for you.
What size cooling pad do I need?
Pad area is the total fan airflow divided by the pad face velocity: about 1.8 m/s for 150 mm pads or 1.25 m/s for 100 mm pads.
Are your poultry fans and pads made in India?
Yes. We manufacture the exhaust fans and cellulose cooling pads in India, and our PVC pad frame is the first made in India.
Do you supply the full pad wall?
Yes: pads, frame, water pipe, tank, pump, filter and drainage kit.
Need help choosing?
Tell us the space and what you need to cool. Our sales team will suggest the right models and send a quotation.