Why swimming pool warmer than room?

Answer 1

I would like to answer your question, but first I think you need to understand my background. We only sell to, and service commercial pools, most of which are indoor pools. We tell our customers to run the air temperature 1-2 degrees warmer than the pool water temperature. If your pool caters to casual swimmers you should run the pool temperature between 84-86 degree's. 83 is too cold and is like getting a cold steak at a fancy restaurant. Thus the air temp should be 85 to 88 degrees. By running the air temp just over the water temp you cut down on evaporation. Evaporation accounts for about 50% of the heat loss in a pool.