CAC Duct S units connect to "universal" residential/light commercial outdoor unit models AC0**BXADCH/AA. This system uses advanced technologies to minimize waste and improve efficiency. By adopting the smart inverter technology, the CAC systems not only offer silent operation but also outstanding cooling and heating performance. Samsung single zone duct units offer a wide external static range and includes an internal condensate pump as standard. The evaporator shall be concealed duct type.