Swimming Pools Dehumidification Calculation Sheet

Swimming Pools Dehumidification Calculation Sheet


To calculate dehumidification load we have to calculate evaporation from indoor pool surface ,moisture from outside ventilation air and moisture from occupants .


1-from ASHRAE handbook can take evaporation rate from activity factor (AF) depend on application residential or hotel or, ..etc 

2- evaporation rate factor (ERF) depend on swimming pool water temperature and air temperature (lb/hr.sq ft)

3- determine pool area in (sq .ft) 

4- then can calculate evaporation rate (lb/hr) = ERF lb/hr. sq ft X AF X pool area 

5- ventilation moisture = [CFM oa x (grains oa - grains return)]/ 

6- recommended ACH 4-8 for outside air7- for one person calculate btu/ hr latent heat load and calculate enthalpy h(lb/hr).

Download Also: International Swimming Pool and Spa Code




Swimming Pools Dehumidification Calculation Sheet


Swimming Pools Dehumidification Calculation Sheet

Factors are used in calculating evaporation from the swimming pool:
  • Water temperature 
  • Air temperature 
  • Air relative humidity 
  • Pool area 
  • Saturation vapor pressure taken at surface water temperature 
  • Saturation pressure at dew point 
  • Level of activity in the pool
Download Swimming Pools Dehumidification Sheet



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