"If the air temperature is below the water temperature, evaporation really starts to increase in an exponential function, and a facility must spend more capital and operational costs while making the swimmers miserable. To find out why, we asked the President of Desert Aire, Keith Coursin.
#INDOOR DEEP THERAPY POOL DRIVER#
Since the relationship between air and water temperature is a primary driver of evaporation rate, maintaining slightly warmer air keeps evaporation to a minimum. Just for clarification, the db in "86✯ db" stands for dry bulb temperature, aka what a standard thermometer reads. To minimize evaporation and operating costs, the air temperature should be kept as warm as practical, ideally at or above the water temperature, with a maximum of 86✯ db, which is generally understood to be the maximum for human comfort." 1 "The relation between temperature and humidity determines evaporation from the pool water surface and the space's condensation dew point. Doing so allows the dehumidifier to also control other aspects of the indoor enviornment such as dew point, evaporation rate, and air temperature. We need to remember that the primary purpose of indoor pool dehumidification is to maintain a consistent relative humidity (RH) in the space. So why 2º above the water temperature? Honestly we didn't actually know, so we scoured ASHRAE §62.1, and also spoke with pool dehumidification experts for help. Related: Indoor pool air quality resources 2º Rule of Thumb For practical purposes, this works for both Fahrenheit and Celsius, as long as you're using the same unit of measurement for both water and air. In short, the rule of thumb is the air temperature of an indoor pool should be two degrees (2º) warmer than the water, but a maximum of 86✯ (30✬).
![indoor deep therapy pool indoor deep therapy pool](https://www.och.org/wp-content/uploads/2013/05/DSCN1649.jpg)
Quality PDU manufacturers have this down to a precise science, and should be used as a resource by mechanical engineers designing any natatorium. Either way, consult your pool dehumidifier manufacturer for assistance with the moisture load calculations. This gets complicated in indoor pool venues with multiple bodies of water that have different temperatures, but in most indoor pool rooms, it's one body of water.
![indoor deep therapy pool indoor deep therapy pool](http://cdn2.gadgetify.com/wp-content/uploads/2014/04/ipool.jpg)
Natatorium air temperature mostly depends on how the pool is used and the water temperature. So let's explore both water temperature and air temperatures, and how they relate to one another. We are frequently asked what air and water temperatures should ideally be for indoor swimming pools.