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The aim of this study was to evaluate the performance of an air-to-air energy recovery system in terms of latent efficiency and recovered energy. Experimental investigations were carried out under controlled conditions in Energy and IEQ Testing Unit located in School of Industrial Technology, Universiti Sains Malaysia. Tests were performed under different airflow rates ranged from 1.0 to 3.0 m/s and intake relative humidity of 70 %, 80 % and 90 %. The latent efficiency and recovered energy of the system were calculated and evaluated by adopting calculation method by ASHRAE Standard. The latent efficiency of this system ranged from 40 to 74 % and the highest value of recovered energy of 1,456 W was achieved at 2.5 m/s and 90 %. Results indicate that the latent efficiency decreased and in contrast the recovered energy increased with increasing airflow rates.