According to some embodiments, there is provided an air conditioning system for a vehicle. The vehicle may be a locomotive. The air conditioning system includes a combination module for mounting in or on a vehicle. The combination module includes a condenser coil and a compressor assembly. The compressor assembly includes an electric motor. The combination module may be mounted to cover a hole in an outer wall or floor of the vehicle, such that air enters the hole ventilates the condenser coil. The system also includes at least one air handler for mounting in a cab of the vehicle, remote from combination module. Each air handler comprises a respective evaporator coil. A combination module including a compressor assembly is also provided. A method for installing the combination module is also provided.

There is provided an underfloor duct which enables inspection of electric equipment to be easily performed, has a simple structure, and hardly allows water to intrude into a duct passage. An underfloor duct according to an aspect of the present invention is an underfloor duct, provided under a floor of a railcar, for storing electric equipment including a cable. The underfloor duct includes: a box having a frame that projects upward, and an opening that opens downward; and a lid that closes the opening and forms a duct passage between the lid and the box. An end portion of the box is located outside an end portion of the lid in a car width direction.

There is provided an underfloor duct which enables inspection of electric equipment to be easily performed, has a simple structure, and hardly allows water to intrude into a duct passage.

An underfloor duct according to an aspect of the present invention is an underfloor duct, provided under a floor of a railcar, for storing electric equipment including a cable. The underfloor duct includes: a box having a frame that projects upward, and an opening that opens downward; and a lid that closes the opening and forms a duct passage between the lid and the box. An end portion of the box is located outside an end portion of the lid in a car width direction.

According to some embodiments, there is provided an air conditioning system for a vehicle. The vehicle may be a locomotive. The air conditioning system includes a combination module for mounting in or on a vehicle. The combination module includes a condenser coil and a compressor assembly. The compressor assembly includes an electric motor. The combination module may be mounted to cover a hole in an outer wall or floor of the vehicle, such that air enters the hole ventilates the condenser coil. The system also includes at least one air handler for mounting in a cab of the vehicle, remote from combination module. Each air handler comprises a respective evaporator coil. A combination module including a compressor assembly is also provided. A method for installing the combination module is also provided.