A transport refrigeration unit for use with a transport trailer comprising: a structural framework mountable to a wall of the transport trailer; a condenser heat exchanger unit mounted to the structural framework ; an evaporator housing separated from the condenser heat exchanger by a distance; and at least one condenser fan assembly positioned aft of the condenser heat exchanger unit and forward of the evaporator housing , the at least one condenser fan assembly including: a fan rotor defining an inlet end, the fan rotor being rotatable about a fan axis (X) and having a plurality of fan blades ; and a casing defining a central opening , the fan rotor being arranged within the central opening , the casing including a plurality of openings spaced about a periphery of the casing , wherein a portion of an airflow moving through the at least one condenser fan assembly is expelled from the at least one condenser fan assembly radially via the plurality of openings; wherein the condenser fan assembly is an axial flow fan; wherein the casing includes a cylindrical shroud frame having a hollow interior configured to define the opening within which the fan rotor is received; and wherein an axial length, measured parallel to the fan axis (X), of the shroud frame is less than an axial length of the fan blades of the fan rotor ; the axial length of the shroud frame , measured parallel to the fan axis (X), is selected such that a downstream surface of the shroud frame is arranged upstream from a stator hub . a structural framework mountable to a wall of the transport trailer; a condenser heat exchanger unit mounted to the structural framework ; an evaporator housing separated from the condenser heat exchanger by a distance; and at least one condenser fan assembly positioned aft of the condenser heat exchanger unit and forward of the evaporator housing , the at least one condenser fan assembly including: a fan rotor defining an inlet end, the fan rotor being rotatable about a fan axis (X) and having a plurality of fan blades ; and a casing defining a central opening , the fan rotor being arranged within the central opening , the casing including a plurality of openings spaced about a periphery of the casing , wherein a portion of an airflow moving through the at least one condenser fan assembly is expelled from the at least one condenser fan assembly radially via the plurality of openings; a fan rotor defining an inlet end, the fan rotor being rotatable about a fan axis (X) and having a plurality of fan blades ; and a casing defining a central opening , the fan rotor being arranged within the central opening , the casing including a plurality of openings spaced about a periphery of the casing , wherein a portion of an airflow moving through the at least one condenser fan assembly is expelled from the at least one condenser fan assembly radially via the plurality of openings; wherein the condenser fan assembly is an axial flow fan; wherein the casing includes a cylindrical shroud frame having a hollow interior configured to define the opening within which the fan rotor is received; and wherein an axial length, measured parallel to the fan axis (X), of the shroud frame is less than an axial length of the fan blades of the fan rotor ; the axial length of the shroud frame , measured parallel to the fan axis (X), is selected such that a downstream surface of the shroud frame is arranged upstream from a stator hub . <EOS>