Preventing Evaporation from your Swimming Pool

Evaporation is the process whereby water becomes a gas and dissipates as the water temperature is increased. It is very common and is the main cause of water loss in pools.

The rate of evaporation differs for all pools, and is affected by the size of the pool surface area, the temperature of the water and air, humidity and wind. A larger pool will endure a greater amount of evaporation as its surface area is larger and the highest evaporation rates occur when there is a great difference between the water and air temperatures. Also, the drier the air is, the higher the evaporation rate. Wind is a considerable factor as it removes the insulating layer of warm, moist air directly above the pool’s surface.

“Pool evaporation can be [very] significant. According to the Australian Bureau of Statistics, the daily evaporation rate in Victoria can range from between 4.6mm in October to 7.5mm in January with the six month average at 6.4mm. This then  has a  knock-on effect  with energy loss, requiring you to top-up your swimming pool more frequently, which then requires more chemicals and running your sanitisation system more frequently.”

Fortunately, new  and  innovative  products and smart design features are available to significantly reduce the rate of evaporation.