Humidity control and air conditioning system

A humidity control and air-conditioning system for a vehicle having a plurality of heat exchangers which are coated with desiccant. The heat exchangers are configured to alternate between a cooling mode and a regeneration mode. In the cooling mode cooled refrigerant is circulated in the heat exchanger and air is passed over the heat exchanger thus cooling and drying the air. In the regeneration mode the heat exchanger is heated by heat generated by an engine and air is passed over the heat exchanger to assist in removing moisture from the desiccant.