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Chlorine Corrosion Resistance: Swimming Pool Dosing Ventilation

01 April 2019

Chlorine poses a number of safety challenges, including the need to prevent the build-up of corrosive vapours in chemical storage cupboards and dosing equipment plant rooms. Such air needs to be extracted by a polypropylene fan in a swimming pool extraction system.

Chlorine is widely used to treat water for swimming pools in leisure centres and domestic pools. When extracting chlorine fumes from areas such as plant rooms and storage cupboards after dosing, the air may be corrosive. If this is the case, it will need to be extracted via a polypropylene fan and plastic ductwork as metal systems would corrode over time.

ATEX Requirements

Chlorine has the potential to become explosive when mixed with certain other chemicals. Therefore, the swimming pool extraction system may need to be ATEX rated. It is recommended that advice should be taken from an ATEX expert regarding zoning certain areas and which components need to be ATEX certified.

Corrosion Resistant Polypropylene

Axair’s range of polypropylene fans are suitable for extracting from swimming pool plant rooms and chemical storage cupboards. They offer single inlet centrifugal fans in standard versions and variants that are suitable for ATEX Zone 2 (to find out more about ATEX zones, visit our ATEX information page). Single inlet centrifugal fans are suitable for extracting air through ductwork and other equipment that may generate a resistance. Furthermore, the polypropylene range of fans can be floor or wall mounted with spigot inlet and discharge, making duct connections easy using our flexible connectors or flanges.

Axair have polypropylene fans to move air from less than 50m/h to over 10,000m³/h with many accessories to make for easy installation. They can also be supplied with a range of inverters for speed control and energy saving.

Extraction from the pool area has different requirements as the air volume to extract from the area may be considerably larger, depending in the size of the pool area. The air from this area may still be corrosive and require a specialist fan. Contact Axair with the details and they will offer a fan from one of our higher capacity ranges.

For more information, visit contact Axair’s team on 01782 349 430 or email


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