Cooling towers and legionella

Cooling towers are used widely across a range of industries in Australia to reject waste heat to the atmosphere. In HVAC systems, this is often used to cool heat-laden condenser water so it can be re-used.

Cooling towers may feature either natural convection or forced convection to promote airflow over the water droplets.

But evaporation of water plus the absorption of airborne pollutants by the water in cooling towers can lead to problems such as Legionella. It is vital, therefore, that the cooling water is monitored and treated.

The resources below provide advice on cooling towers and water treatment.

DA manuals and guidelines
DA17 Cooling Towers
DA17 Cooling Towers

DA17 is a guide to the selection and application of cooling towers for mechanical services in buildings. The scope of this application manual includes the manufacture, design, installation, maintenance and management of cooling towers and their associated systems. It contains detailed advice and information on open and closed circuit, direct and indirect cooling towers.
DA18 Water Treatment
DA18 Water Treatment

DA18 details the scientific principles on which water treatment practices are based. It describes proven techniques which can reasonably be expected to be applied in water treatment system design, installation, maintenance and monitoring.
AIRAH Best Practice Guideline: Water conservation in cooling towers
AIRAH Best Practice Guideline: Water conservation in cooling towers

This document has been prepared to assist the owners and operators of cooling towers and evaporative cooling systems in reducing the water consumption of cooling systems while retaining required performance. Its intention is to identify the ways in which a cooling tower consumes water and outline a series of best practice recommendations to assist the tower operator or water treatment service provider in the reduction of overall tower water consumption.

Water Treatment Service Providers

Course: Water Treatment Service Providers



This page was last updated January 17, 2022

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