Large warehouses, factories and workshops can be difficult to cool because they combine high ceilings, large internal volumes, open doors and significant internal heat loads.
In many of these buildings, cooling the complete air volume is neither necessary nor the most practical objective. What matters is improving thermal conditions where people actually work.
Industrial spot cooling uses mobile high-airflow equipment to deliver cooled air directly to workstations, production lines and other occupied zones. For suitable applications, evaporative air coolers are particularly effective because they combine high airflow, mobility and continuous fresh-air cooling.
What is industrial spot cooling?
Industrial spot cooling means treating a defined working area rather than trying to maintain the entire building at one fixed temperature.
A mobile cooler can be positioned close to the people or process area experiencing the greatest heat exposure. This is especially relevant in buildings where workers occupy only a small proportion of the total air volume.
Why evaporative air coolers are well suited to spot cooling
Direct evaporative air coolers use water evaporation rather than a refrigerant compressor to reduce the temperature of incoming air.
Warm ambient air is drawn through a water-wetted evaporative medium. As water evaporates, it absorbs heat from the incoming air. A high-volume fan then directs the cooler airflow into the workspace.
The objective is not necessarily to create an office-like climate throughout the complete building. The objective is to create a large controlled stream of cooler moving air through the occupied zone.
Spot cooling, zone cooling and distributed cooling
Individual workstation
One cooler provides airflow towards an operator, machine or concentrated heat-exposure area.
Defined production area
One or more coolers serve a workshop bay, production line, packing zone or maintenance area.
Multiple work zones
Several mobile units are positioned throughout a larger building to establish multiple cooled operator zones.
Where industrial spot cooling is particularly effective
The strongest applications are typically those where heat is concentrated, air exchange is already present and workers remain in identifiable operating zones.
Metalworking and heavy industry
Furnaces, welding, machining, extrusion and other hot processes can expose operators to high air temperatures and radiant heat. Once heat is controlled at source where possible, mobile evaporative coolers can deliver high-volume airflow through occupied production zones.
Paper, cardboard and printing
Paper machines, corrugators and high-speed production equipment can generate continuous heat along long production lines. Multiple coolers can be positioned around operator stations instead of treating the complete production hall.
Aircraft and large maintenance halls
Aircraft production and maintenance buildings contain extremely large volumes while technicians work in relatively small intervention zones. Mobile cooling allows airflow to be concentrated around assembly, logistics and maintenance activities.
Automotive workshops and garages
Garages frequently operate with large access doors open throughout the day. Technicians remain around vehicle lifts, inspection areas and workbenches, making targeted mobile cooling a practical solution for active workshop zones.
Industrial laundry cooling
Washing machines, dryers and ironing lines continuously introduce heat into occupied production areas. Cooling can be directed specifically along finishing lines, ironing stations and operator positions where thermal exposure is highest.
Food production and bakeries
Ovens, baking tunnels, dryers and hot processing equipment can create concentrated thermal loads. Spot cooling allows airflow to be directed towards operators near oven exits, inspection areas and packaging stations.
Why high airflow matters
Industrial cooling performance is not determined only by the temperature of the supply air. The volume, direction and reach of that airflow are equally important.
Industrial evaporative coolers are designed to move large volumes of air through the occupied work zone, which is particularly important in high-ceiling industrial environments.
| Nominal application area | Airflow class | Typical approach |
|---|---|---|
| Up to 60 m² | 5,000 m³/h | Local / compact cooling |
| Up to 150 m² | 12,000 m³/h | Spot or small-zone cooling |
| Up to 250 m² | 22,000 m³/h | Industrial zone cooling |
| Up to 400 m² | 30,000 m³/h | Large work zones |
| Up to 600 m² | 48,000 m³/h | Large industrial areas |
These area values are useful for initial model selection, but final sizing should also consider ceiling height, internal heat load, ventilation, humidity and cooler positioning.
Professional versus industrial configurations
Required airflow is only one selection parameter. The surrounding environment also matters.
Professional VL configurations are primarily intended for relatively clean commercial and professional spaces.
Industrial KM configurations add Pureflow G4 incoming-air pre-filtration, helping reduce coarse dust and larger airborne contamination before air reaches the evaporative section.
G4 pre-filtration should not be confused with HEPA or fine process filtration. Its role is coarse incoming-air protection for demanding industrial environments.
Industrial KM configurations also include an extended 5-year warranty.
Ventilation is part of the cooling strategy
Evaporative cooling works particularly well in buildings where fresh air can move through the occupied area.
Because evaporation adds moisture to the airflow, treated air should have a clear route out of the building through loading doors, windows, roof vents or mechanical extraction.
warm fresh air → evaporative cooler → occupied working zone → air leaves the building
This is one reason the technology is well suited to warehouses, workshops and production halls that already operate with open doors and significant air exchange.
Humidity and cooler selection
Relative humidity is an important engineering parameter for direct evaporative cooling.
Hot, relatively dry air has greater capacity to absorb additional water vapour and therefore offers greater evaporative cooling potential. As incoming humidity increases, the achievable temperature reduction becomes smaller.
Temperature and relative humidity should therefore always be considered together when selecting an evaporative cooler.
Why several mobile coolers can outperform one central unit
Selecting the largest available cooler is not automatically the best solution.
A large or irregular factory may contain several independent work zones separated by machinery, racking or production equipment. One centrally positioned unit may therefore have difficulty delivering effective airflow to every operator.
Several smaller coolers can instead be distributed around the actual work areas. This creates shorter airflow paths and makes the cooling arrangement easier to adapt when production layouts change.
Mobile cooling also makes sense for seasonal heat
Many companies only require additional cooling during the warmer months.
A mobile system avoids the need to install permanent cooling equipment solely for a seasonal requirement and allows equipment to be moved between departments when required.
Industrial air coolers for purchase and rental
Filtra International supplies mobile evaporative air coolers for both purchase and rental, subject to availability.
Rental can be useful for seasonal heat, temporary production requirements, heatwaves, maintenance projects or businesses that first want to evaluate the cooling concept in their own facility.
For permanent or recurring cooling requirements, equipment can be purchased in capacities from compact 5,000 m³/h units through to industrial models delivering up to 48,000 m³/h.
How to assess an industrial spot-cooling application
Before selecting equipment, useful information includes:
- floor area of the cooling zone;
- ceiling height;
- location of workers;
- internal heat sources;
- typical summer temperature;
- relative humidity;
- existing ventilation and extraction;
- open doors and loading bays;
- dust or airborne contamination;
- daily and seasonal operating hours.
These parameters help determine the required airflow, number of coolers and whether a professional or industrial configuration is appropriate.
Related technical resources
For a detailed explanation of evaporative cooling, airflow, humidity and model selection, see our Industrial Evaporative Air Cooling technical guide .
Available equipment can be viewed in our Industrial Evaporative Air Cooler collection .
For further information about workplace heat exposure, see Industrial Heat Stress Explained .