Exal made heatless dryers have been optimized to suit industry needs. The heatless dryer consists of 2 towers which, alternately cycle on drying and regeneration. Each tower is filled with a bed of adsorbent desiccant. The tower on drying cycle adsorbs the moisture from the incoming wet air. The tower on regeneration uses a small portion of the dried air passing through the desiccant to remove the adsorbed moisture. This air is later vented to the atmosphere. The cycle is maintained using a control panel.