This paper focuses on an experimental investigation of the water evaporation rate into the moving air currents of indoor swimming pools. A series of experimental measurements have been carried out to investigate the effects of different parameters on the evaporation rate from water surface. Based on experimental measurements, a new correlation has been attained for the water evaporation rate into the moving air. The new empirical correlation indicates a functional relationship between the exponent of vapor pressure difference and the air stream velocity. The predictions of the new approach gives good agreement with measurements. The comparison between water evaporation rates from free water surface and wetted surface shows that for low air velocities, evaporation rate from wetted surface is higher than that of free water surface and for high air velocities, it is reversed..

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