The water vapor and the silico-alumino-phosphate (SAPO-34) material has been recognized to be one of the better adsorbate-adsorbent pairs for the packed-bed adsorptive thermal energy storage (TES) systems for space heating applications. In this paper, operating conditions including the system construction materials selection, cooling methods of the system after regeneration, relative humidity (RH) of inlet air, and packed-bed regeneration temperatures have been examined for the TES system performance evaluation and process design optimization purposes.