Although counter intuitive, using a heat pipe air-to-air heat exchanger in summer for both sensible cooling (Indirect) and adiabatic cooling and humidification (Direct) of the outdoor air in an arid climate can reduce peak refrigeration tonnage while exceeding Standard 62.1 outdoor air ventilation for a Natatorium. Heat recovery in cold ambient conditions allows the system to exceed minimum code outdoor air flow requirements into the Natatorium to dilute and remove Chloramines and maintain a better Indoor Air Quality ( IAQ) in the pool enclosure without additional heating costs. This case study analyzes the Aquatic Center project installed in Dublin, California.