Fresh Air Handling Unit (FAHU) is an excellent solution for regulating and circulating fresh air as part of an HVAC system and it ensures a constant flow of fresh clean air and a very well-conditioned environment. FAHU delivers treated fresh air to the building. The Fresh Air Handling Units conditions outdoor air as necessary to meet system performance requirements by filtration, cooling, dehumidification, and/ or heating. Additional energy saving methods can be provided in this system by using a Heat Recovery wheel/pipe which can extract the energy from the exhaust air from the building.