FAQ 16 What is the best way to heat the air and water in the pool hall and swimming pool?

Answer

Many people do not understand that the air in an indoor swimming pool hall is heated by the heat that comes off the water by evaporation.

As a consequence the air in an indoor swimming pool hall is full of water vapour - in technical terms - the himidity is very high. If the humidity level is not controlled condensation will occur and leave every surface in the pool hall running with condensation.

This is a complex process and in the past it was very difficult to control the environmental conditions in a pool hall. But now - thanks to modern Air Handling Units - the air and water temperatures and humidity levels are controlled at the touch of a button.

Modern AHU's are extremely economic to operate because they carry out the following on a continuous basis:-

Outside the winter months the cheapest way to provide the energy required to heat the pool water to about 29 / 30 degrees C (the temperature that most people will find comfortable) is an air source heat pump (ASHP)

For about 9 months of the year the ASHP will provide about 4 or 5 times the energy required to run it. It is theoretically possible to provide heating throughout the year with high output ASHP's but the capital cost of such equipment is very high.

So in most modern pool installations the heat input in the winter months is provided by a high efficiency gas condensing boiler that provides the heat input directly to the AHU.