Belt Driven Wall Mount Fans
Large-diameter belt-driven wall-mount fan for high-volume industrial and agricultural ventilation.
About the Belt Driven Wall Mount Fans
When you need to move tens of thousands of cubic metres per hour through a wall — the airflow that keeps a poultry house, dairy or large industrial bay liveable — the belt-driven wall-mount fan is the standard tool. Larger diameters spin slower and quieter than direct-drive equivalents while pushing more air, and the belt drive lets you re-pulley for different speeds without replacing motors.
Engineering Advantages
Diameters up to 1530 mm move five times the air of a direct-drive at the same noise level
Belt drive allows speed change without motor replacement
Galvanised cone discharge boosts effective airflow by 10–15% over a flat orifice
Sized down to 650 mm for small bays or partial-rate replacement
Key Features
- Statically + dynamically balanced impeller
- Galvanised cone discharge for high effective airflow
- Cast-iron pillow-block bearings with grease nipples
- Adjustable belt-tension slide rails
Technical Specifications
| Size | Air Flow | Voltage | Power | RPM | Sound |
|---|---|---|---|---|---|
| 1530 | 55,800 CMH | 220 / 415 V | 1,500 W | 325 | < 65 dBA |
| 1380 | 44,000 CMH | 220 / 415 V | 1,100 W | 440 | < 65 dBA |
| 1220 | 38,000 CMH | 220 / 415 V | 750 W | 450 | < 65 dBA |
| 1000 | 32,000 CMH | 220 / 415 V | 550 W | 600 | < 65 dBA |
| 800 | 20,000 CMH | 220 / 415 V | 370 W | 600 | < 65 dBA |
| 650 | 16,000 CMH | 220 / 415 V | 370 W | 600 | < 65 dBA |
Construction & Materials
- Heavy-gauge galvanised orifice and cone
- Aluminium impeller with hub-mounted balance plugs
- Cast-iron pillow-block bearings, regreasable
- IP 55 TEFC motor on adjustable slide rails
- Galvanised back grille and pull-chain shutter (optional)
How to Choose the Right Variant
- 1Poultry farms: 25–35 air-changes per hour for tunnel ventilation, choose by floor area × ceiling height
- 2Industrial bays: pick by required wind-chill velocity at body level (1.5–3.0 m/s typical)
- 3Match supply / inlet area to avoid pulling the building into negative pressure
Installation Notes
- For poultry tunnel ventilation, place fans on the leeward end wall and inlets on the windward end
- Install a galvanised cone discharge for maximum effective airflow
- Set belt tension after 24 hours of running and re-check every 3 months
Maintenance Schedule
- Wash impeller and orifice every season for agricultural duty
- Lubricate bearings every 6 months
- Replace belts annually as a matched set
Industries Served
Standards & Compliance
- AMCA 99 fan classifications
- V-belt drive selection per IS 3142
Frequently Asked Questions
How many fans for a poultry house?
For tunnel ventilation, target 25–35 air-changes per hour. For a 12 m × 100 m × 3 m house (3,600 m³ volume), that is roughly 90,000–125,000 CMH — three to four 1380 size fans on the end wall.
Why not direct-drive at this size?
A 1530 direct-drive would need a slow-speed multi-pole motor that is significantly heavier and more expensive than a small motor + belt drive. Belt drive is the economical and serviceable choice at this diameter.
Related Axial Flow Fans
Need help selecting the right fan?
Our engineers will help you size the belt driven wall mount fans to your exact application — capacity, static pressure, and installation constraints.
