A double-suction centrifugal fan includes: a first impeller coupled to a shaft; a second impeller provided with a second inlet port opened opposite to an electric motor and coupled to the shaft at a position farther from the electric motor than the first impeller; a first bell mouth connected to a first inlet port of the first impeller, and a second bell mouth connected to the second inlet port of the second impeller. An axial length L2 of the second bell mouth is greater than an axial length L1 of the first bell mouth.