Evaporative cooling

The biggest concern with evaporative cooling is that these systems can harbour biofilms containing Legionella pneumophila bacteria which causes Legionnaires’ disease, a serious threat to public health.

Biofilms also reduce the performance of these heat exchange systems; they can block the system leading to poor reliability and corrosion.

Further reading on evaporative cooling

https://www.hse.gov.uk/legionnaires/

See here for a fact sheet.

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