TOP 7 Mistakes When Installing Mist Extraction Systems in Metalworking

January 6, 2026 at 12:09 pm

TOP 7 Mistakes When Installing Mist Extraction Systems in Metalworking

Mist extraction systems (oil mist collectors, air aspiration systems) are essential for safe and efficient metalworking. However, many workshops fail to achieve the expected results not because of poor equipment quality, but due to incorrect planning and installation. Below are the 7 most common mistakes that should be avoided from the very beginning.

1. Incorrectly calculated required capacity

One of the most common mistakes is selecting a mist collector based only on price or rough estimates. If the following factors are not considered:

number of CNC machines
machining process (milling, turning, grinding)
amount of cutting fluids used

the system becomes underpowered, and oil mist remains in the workspace.

2. Incorrect installation location

Mist collectors are often installed where there is free space, rather than where they perform best. Long or complex ducting significantly reduces system efficiency.

Best practice: install the unit as close as possible to the pollution source, with minimal bends.

3. Inappropriate filtration technology

Not all oil mist is the same. Fine aerosols, smoke, and emulsions require different filtration technologies:

mechanical filters
coalescing filters
electrostatic filters

Choosing the wrong solution leads to rapid filter clogging or insufficient filtration.

4. Ignoring air recirculation considerations

In some workshops, cleaned air is returned indoors without proper quality assessment; in others, warm air is completely exhausted outside, increasing heating costs.

Mistake: failing to consider local regulations, filtration level, and energy efficiency.

5. Lack of maintenance planning at the design stage

If the system is designed so that:

filters are difficult to access
there is no space for servicing
condensate or oil drainage is not provided

maintenance is performed less frequently than required in real operation.

6. One solution for all machines

Connecting multiple CNC machines to a single mist collector without proper airflow balancing is a common mistake. Different machines generate different pollution loads.

7. Lack of professional consultation

Designing the system independently without experience often leads to costly corrections later. Mist extraction is an engineering system, not just a fan with a filter.

Conclusion

A properly installed mist extraction system:

improves workplace air quality
extends CNC machine lifespan
reduces health risks
helps comply with safety regulations