An important consideration for an indoor pool, ventilation is the process of replacing stale air with clean air. Unlike in outdoor settings, in an indoor pool water vapor is trapped inside, leading to condensation and stale air.

This, in turn, can cause rust, paint blistering, problems with the structural supports and a muggy environment. Ventilation helps remove the water vapor, by replacing that air with clean air. In short, a good ventilation system will keep humidity levels down — and protect equipment and structures — in an indoor facility.

Ventilation also is critical in pump and mechanical rooms, where equipment or chemicals are stored. Proper fresh air supply must be accompanied by mechanical-discharge ventilation to achieve required air changes. Keep in mind that many chemical gases are heavier than air and will require low-level exhaust systems in chemical rooms.

Typically, the air should be circulated completely each hour. However, the ventilation system should be capable of circulating the air twice in one hour. The amount of moisture produced by the pool determines the size of the ventilation system. And this depends on the surface area of the pool, the water temperature, the indoor temperature, the relative humidity and the amount of air movement over the surface of the water.

A ventilation expert can help any pool owner or manager determine the right size and type ventilation system is necessary. Because this is a major expense, it’s important to consider how the facility will grow in coming years. In addition, maintenance and upkeep should be considered in the overall price.