Divide the floor area you want to cool by the coverage of one cooler, then add capacity for high roofs, hot machines and crowded floors. As a starting point, one 18,000 CMH duct cooler covers up to 1,000 sq ft and one 50,000 CMH cooler up to 3,000 sq ft.
Coverage per cooler
| Model | Motor | Covers up to |
|---|---|---|
| 18,000 CMH | 1.1 kW | 1,000 sq ft |
| 22,000 CMH | 1.5 kW | 1,200 sq ft |
| 25,000 CMH | 2 kW | 1,500 sq ft |
| 30,000 CMH | 3 kW | 2,000 sq ft |
| 50,000 CMH | 4.5 kW | 3,000 sq ft |
These figures assume a normal-height shed with reasonable ventilation.
Step 1: decide what area to cool
Cooling the whole building is not always needed. In a warehouse you may only need to cool packing and dispatch areas; in a factory, the production lines. Measure that area.
Step 2: divide by coverage
Example: a 12,000 sq ft production floor.
- With 30,000 CMH coolers: 12,000 ÷ 2,000 = 6 units
- With 50,000 CMH coolers: 12,000 ÷ 3,000 = 4 units
Our industrial cooler calculator shows this for every model.
Step 3: adjust for your site
Add capacity when:
- The roof is high and air has a larger volume to fill
- The roof is bare metal sheet that heats up in the sun
- There are ovens, furnaces, kilns or many motors giving off heat
- Many people work close together
- Ventilation is poor, with few openings for warm air to escape
Reduce it slightly when the space is shaded, well ventilated and lightly used.
Step 4: plan where the air goes
Coolers work best when the cooled air is ducted to where people stand, and warm air can leave on the opposite side through open doors, vents or exhaust fans. Without an exit for warm air, humidity builds up and comfort drops.
Few large or many small coolers?
- Fewer large units mean fewer wall openings, fewer water and power points, and simpler maintenance.
- More smaller units spread air more evenly in divided spaces and keep some cooling running if one unit is down.
Check the power supply
The 18,000 to 30,000 CMH coolers come in single or three phase; the 50,000 CMH model is three phase only. Fit a controller with a phase preventer on three-phase units.
Get it confirmed
A site visit catches what a formula cannot: wind direction, heat sources and where ducts can run. Site visits are free in Mumbai and nearby Maharashtra; elsewhere a visit fee applies. Ask for a quotation or see industrial coolers.
Frequently asked questions
How many square feet does one industrial cooler cover?
From about 1,000 sq ft for an 18,000 CMH duct cooler to about 3,000 sq ft for a 50,000 CMH unit.
How many coolers does a 10,000 sq ft factory need?
Around five 30,000 CMH units or four 50,000 CMH units, adjusted for roof height and heat from machines.
Do I need exhaust fans with industrial coolers?
Warm air must be able to leave. Open doors and vents may be enough; otherwise exhaust fans keep the fresh cooled air flowing.