A Central Air Conditioner is the traditional heating - cooling solution installed in most modern housing; utilizing ducts to distribute conditioned air to one or more area. Central Air systems offer the most versatility and options in terms of multi-zone temperature control and add-ons. Central units come in sizes up to 5+ tons (60,000 BTUs) for large volume applications but generally require HVAC experience to complete installation. Modular 2-piece design allows for up flow, downflow, counter flow and horizontal installations.