the air outlet 32 with respect to the common bottom plane the centrifugal blower fan wheel 35 is rotatably disposed in the air channel 34 and a center of the fan wheel 35 is axially aligned with the center 33 with respect to a reference axis in addition the fan 3 can be selectively comprised of a lid not labeled being adapted to cover the top portion of the casing 30 similarly a casing of computer is being adapted to use like the lid assembling the fan 3 in a notebook computer shall now be described with reference to fig6 as the fan 3 is mounted in a limited thickness of a casing 40 of a notebook computer 4 the two air inlets 31 are aligned with an interior of the computer 4 while the two air outlets 32 aligned with two air outlet 41 of the computer 4 hence ambient heat from interior electronic components can be dissipated via the air outlet 41 of the casing 40 referring back to fig4 through 6 when the motor initially rotates the centrifugal blower fan wheel 35 some airflow may be formed outflow from the air outlets 32 and 41 beyond the casing 40 of the computer 4 subsequently the.