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Is air handling missing from your indoor swimming pool?

4 min read
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In this article, we’ll be covering some of the most common issues caused by the lack of an effective ventilation system, and how Dantherm air handling units can solve the problems that so many indoor pools face time and again.

For creating a comfortable environment for swimmers, protecting your building and ensuring the wellbeing of staff, ventilation is key in the operation of any indoor swimming pool.

Have you ever noticed that some indoor pools constantly have steamed-up windows, slippery tiles and a foggy atmosphere that stings your eyes? You may have even seen spots of mould and mildew beginning to form in certain areas. These are all telltale signs of unventilated humid air. Not only is this detrimental to your experience as a visitor, but also a serious risk to your health and to the pool building itself.

Humidity is predominantly caused by water that evaporates from a pool's surface throughout the day. In an unventilated pool hall, moisture will remain in the air and settle as condensation when the temperature drops. This condensation can lead to:

  • Chemical corrosion
    As a swimming pool evaporates, chlorine will be picked up in the water vapour. When these chlorinated droplets settle as condensation, corrosion is dramatically accelerated. This will cut the lifespan of equipment, eat away at furnishings, cause electrical faults and even deteriorate the structural integrity of a building.

  • Mould and mildew
    Condensation creates the perfect conditions for mould and mildew which, if left untreated, can quickly spread throughout a building. As it eats away at walls, ceilings, carpets and furnishings, toxic airborne spores are released into the atmosphere. These can cause skin irritation, severe coughing and respiratory conditions.

  • Uncomfortable environments
    Fluctuating temperatures, poor visibility and a strong smell of chlorine are caused by unventilated humid air. During busy hours, these factors are exasperated, making the pool hall an incredibly unpleasant (and, in some cases, dangerous) place to be for both swimmers and staff.

How Dantherm air handling units stop condensation in its tracks

Dantherm air handling units replace humid air from inside your pool building with fresh clean air from outside. This prevents the problems caused by condensation before they have a chance to take hold.

As well as saving on potential damage, Dantherm air handling units can also cut your energy consumption. With the option to include a heat exchanger and a reversible heat pump in your system, you can achieve energy recovery of up to 100%.

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Key considerations

While evaporation is an inevitable factor of any indoor swimming pool, investing in a high quality air handling unit enables you to ventilate the space and stay in control of humidity and temperature. The best system for your facility can be determined by:

  • The size of your pool

  • Water temperature

  • Bathing activity


To help you get started, our team can give you expert advice on implementing a system that meets all your requirements. Get in touch to find out more.

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