Abstract: An evaporator for a transport refrigeration system configured to be mounted in a conditioned space and having a downwardly facing intake and an air discharge end adapted to discharge conditioned air horizontally. The evaporator includes a structural frame for mounting the unit. The structural frame includes first and second lateral supports extending on opposite sides of the evaporator and at least one horizontal transverse member interconnecting the lateral supports. The evaporator fan is structurally supported by the transverse member at a location in fluid flow communication with the air intake. The evaporator coil extends between the lateral supports intermediate the air discharge end and the location of the evaporator fan. The lateral supports serve as tube sheets of the heat exchanger.