Depending on the size of your pool, you could lose up to 1 ½ inches of water a week due to evaporation.

The intense heat during the day mixed with the cooler weather at night is the perfect recipe for evaporation. The difference in temperature between your pool water and the outside air is what causes evaporation.

The more exposure your pool has to the outdoor elements, the more evaporation your pool will experience. A pool that is fully exposed to the sun and wind will lose the most water. Uncovered pools will lose more than a covered pool.

Using an ocea cover on an indoor or an outdoor pool will have other important energy and cost savings. Firstly using a cover on an indoor pool allows you to more easily control your swimming pool hall environment. As explained the majority of energy escapes from a pool in the form of evaporation or steam. In an enclosed environment such as a pool hall this must be controlled, as the environment will quickly become unpleasant for bathers due to high humidity levels, and the steam is extremely detrimental to the fabric of the building over time can cause structural damage.

To control the humidity within your pool hall a dehumidification and an air heating system will be required The capacity of this sophisticated equipment will be determined directly by the amount of evaporation that it will be required to handle. Using a cover will mean that the average amount of evaporation will be greatly reduced and therefore the capacity of the unit required and the capital cost of the dehumidification system can be greatly reduced by opting to use a pool cover. As well as this there will be direct effect on the running cost of this equipment using a cover can easily half the demand on this system therefore reducing the running cost by a similar amount. Long term this will amount to a huge energy saving.

Ocea Systems also have a sophisticated control system that can be linked into most top end dehumidification systems so that the system knows when the pool cover is on the pool. This will allow the system to then reduce the air temperature again allowing further energy savings commonly the air temperature is kept 1º Centigrade above the water temperature when a cover is off the pool. So using a cover and linking it with your dehumidification system can mean that the air heating can be dropped from 30ºC to a usual room temperature of 22ºC and given that most people only use their pool for a couple of hours a day then this facility that the Ocea system provides can potentially be another huge long term reduction on your energy use. 

An Ocea cover provides an excludable surface on the top of the pool, preventing 95% of water evaporation. Evaporation can be a costly problem when looking to maintain your pool as it changes the concentration of pool chemicals. In addition to this, it contributes significantly to heat loss (85%). Together, these are two of the most expensive pool maintenance issues.

Water evaporation is an even more significant issue when considering an indoor pool, as you need to consider air humidity and temperature control. This may lead to you having to install a complicated and expensive dehumidifying system.