Energy recovery systems can be used in HVAC to reduce energy consumption by recovering wasted
energy from the exhausted air to pre-cool inlet fresh air. In this paper, experimental study of utilizing
cooling coil (CC) and cooling coil combined with heat exchanger (CCHE) has been developed. Considering
the different climate zones in Iran, the experimental study has been done for the areas with high
humidity content. In each case, the effects of air-to-air heat exchanger (HE) on the sensible and latent
cooling load are investigated. The analysis gives the applicability of HE in Iran for various operational
conditions to obtain air with lower moisture content. In CCHE systems more latent load quota is
allocated in cooling coils and lower air humidity ratio can be obtained. Also in the cities with higher dew
point depression (difference between dry-bulb and dew point temperature) more humidity reduction is
achieved and the difference between latent load quotas of CCHE system is higher than CC system.