A Packaged Terminal Dx Unit (PTDx) is a unit designed to provide heating, air conditioning, and ventilation functions for commercial buildings. It is typically used for cooling and heating applications in hotels, motels, condominiums, apartments, and other multi-unit residential complexes. The PTDx unit consists of an outdoor condenser and an indoor evaporator coil connected with refrigerant piping. The outdoor condenser is responsible for converting the refrigerant from a low temperature and low pressure vapor to a high temperature and high pressure liquid. The indoor evaporator coil then converts the refrigerant back to a low temperature and low pressure vapor to be used in the air conditioning and heating system. The PTDx unit is powered by electricity and includes controls, a compressor, and a fan. The controls regulate the air temperature, humidity, and air flow, while the compressor and fan help to circulate the air throughout the building. The PTDx unit is an important part of the overall H