Ductable Air Cooler vs AC for Factories: Which Is Right for Your Shop Floor?

Every summer, factory owners across India face the same decision: should the shop floor be cooled with air conditioning or with ductable evaporative air coolers? Both lower the temperature workers feel, but they work on completely different principles, cost very different amounts to run, and suit different buildings. This article compares the two so you can choose with confidence.

How each system works

Air conditioners use a refrigerant cycle and compressor to remove heat and moisture from air that is mostly recirculated inside a closed room. To work efficiently, the space must be sealed — doors, windows and roof vents kept closed.

Ductable evaporative air coolers pull outside air through wet cooling pads. As water evaporates, the air temperature drops, and the cooled fresh air is blown into the building through ducts. Hot, stale air leaves through open doors, windows or exhaust fans. Because they constantly bring in fresh air, they are designed for open or semi-open spaces.

1. Running cost

This is where the difference is largest. An evaporative cooler's main power draw is its fan motor. For example, the Ayzair AYZAIR-18 ductable cooler delivers 18,000 CMH of air on a 1.5 kW motor and covers roughly 100 m² (about 1,075 sq ft). Air conditioning a large, high-roofed shed of similar size would typically need several tons of AC capacity, with compressors consuming many times that power. For big industrial floors, evaporative cooling generally has a far lower electricity bill.

2. Fresh air and air quality

Factories produce heat, fumes, dust and odours from machines and processes. AC recirculates the same indoor air, so these build up unless separate ventilation is added. Evaporative coolers replace the air continuously with filtered, cooled outside air, which helps keep the shop floor fresher — an important benefit in workshops, textile units, packaging lines and food processing areas.

3. Climate and humidity

Evaporative cooling works best in hot, dry weather, which covers a large part of India for much of the summer. In very humid coastal conditions or during the monsoon, the temperature drop is smaller. AC lowers both temperature and humidity regardless of weather, so it remains the better choice for processes that need tight humidity control.

4. Building type

• Large sheds with high roofs, open doors and frequent material movement: sealing them for AC is difficult and expensive — evaporative cooling is usually more practical.
• Small, enclosed rooms such as control rooms, labs, server rooms or clean rooms: AC is the right tool.
• Many plants combine both: AC for sensitive rooms, ductable coolers for the main production floor.

5. Installation and maintenance

Ductable coolers need a water supply, a drain and ducting to the working zones, but no refrigerant piping or gas charging. Routine maintenance means cleaning the cooling pads and tank and checking the pump and motor. AC systems need refrigerant handling, compressor servicing and more specialised technicians.

Quick comparison

Which should you choose?

If your factory is a large shed with high ceilings, open doors and people working on the floor, a ductable evaporative cooler — often combined with exhaust fans and HVLS fans for air movement — will usually give the best comfort per rupee spent. Reserve AC for enclosed rooms where precise temperature or humidity is required.

Ayzair, a Pune-based manufacturer, makes ductable evaporative air coolers from 18,000 to 30,000 CMH along with HVLS and exhaust fans, and offers free cooling sizing for your building. Share your requirement at ayzair.com/contact.