Atom2 is a unique Split Air-Conditioner which has 2 Indoor Units with a single Outdoor Unit. Atom2 has a special programmable logic controller which operates the AC's refrigerant cycle in an intelligent manner. It detects whether one Indoor Unit {IDU} is working or both are working. According to that logic, it diverts the refrigerant flow to the desired IDU or both IDUs {when functioning simultaneously}. Thus, this technology gives you the flexibilty of installing two Indoor Units of Atom2 wherever required. For example, one in the bedroom and the other in the kitchen.