Controlling the humidity in your indoor pool or spa room is a unique challenge. These rooms are naturally humidified as you heat the water in your pool or spa to a comfortable temperature. This process often creates too much humidity in the air, which can lead to mold and mildew infestations, structural damage, uncomfortable air quality, and even health issues for you, your staff, and your patrons. Compounding the problem, when the heated water evaporates into the air, chemicals such as chlorine and disinfectants used to treat the water materialize as condensation. These chemicals may cause interior damage to objects and fixtures inside your space, prompting costly ongoing repairs. Using a dehumidifier designed for an indoor pool or spa room stabilizes your pool environment and protects the facility. Below are our most recommended dehumidifiers for indoor pool and spa rooms.


Using heat pump technology for pool heating

The process of dehumidification involves moisture-laden air being drawn into a dehumidifier where the air passes across a refrigerated coil. The air is rapidly cooled below its dew point, condensing the water vapor and recovering its latent heat energy for re-use. The cooled air is then passed across the condenser where it is reheated and returned to the served area at the required lower relative humidity.

How to size a pool Dehumidifier

When you’re calculating the size of the dehumidifier you need for your pool, there are several factors to consider:

  • 1. Size of the Pool Room

    As the size of the pool room increases, the amount of air in the room increases as well. Knowing the size of the room can help you figure out how many times the dehumidifier will process the air in the room each hour. If this number is too low, the system won’t work properly and the room will still be humid. On the other hand, if it’s too high, the air can become uncomfortably dry for your guests.

  • 2. The Pool's Surface Area

    This measurement is essential because it helps calculate how much moisture your pool is giving off. The pool’s depth is actually irrelevant, as water evaporates directly from the surface. Make sure you know this measurement when you’re choosing your indoor pool dehumidifier sizing.

  • 3. The Temperature of the Pool and the Room

    Temperature has a major impact on the amount of humidity that needs to be removed from your indoor pool room. The warmer the water in a pool is, the more moisture enters the air as it evaporates. For this reason, dehumidifiers are more efficient in warmer rooms.

     Your heating and cooling needs are also a significant factor to consider when you’re choosing a dehumidification system for your indoor pool. With the right equipment, an indoor pool dehumidifier can also act as a heater or air conditioner.

  • 4. Average Capacity of the Pool

    The more people there are in a pool at a given time, the more humidity will be in the air. The humidity increases for a number of reasons:

    • More people in the pool means a higher surface area and more evaporation.
    • People exhale moisture when they breathe.
    • Swimmers kick up water as they play in the pool.