Why swimming pool warmer than room?
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.