Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I think the EnergyPlus SwimmingPool:Indoor would probably be the best approach it does the evaporation and heat transfer as well as being connected to a EnergyPlus branch. You might want to look at the documentation:
http://bigladdersoftware.com/epx/docs/8-4/input-output-reference/group-internal-gains-people-lights-other.html#swimmingpoolindoor
And the EnergyPlus example file named:
5ZoneSwimmingPool.idf
