A centrifugal fan arrangement comprising a centrifugal fan rotatably mounted within a scroll housing, wherein said centrifugal fan comprises a plurality of circumferentially spaced fan blades fixed to a central fan axle extending along an axial direction and/or to a circumferential fan ring extending in a plane orthogonal to an axial direction, wherein said scroll housing comprises a housing main portion with a maximum housing diameter D and a maximum axial housing width H, a housing inlet portion and a housing outlet portion, said housing main portion surrounding said centrifugal fan at radially outer locations to define a circumferentially extending air guiding space, said housing inlet portion being located at radially inner locations to define an inner air inlet space, and said housing outlet portion being located at a radially outer location in order to define an air outlet space, wherein a ratio D/H between said maximum housing diameter D of said housing main portion and said maximum axial housing width H of said housing main portion is comprised between 20/10 and 35/10, and preferably between 25/10 and 32/10, wherein the centrifugal fan arrangement comprises pressure sensor means (PS1, PS2) for measuring air pressure within and/or outside said centrifugal fan arrangement, wherein the pressure sensor means comprises a pressure sensor located outside a duct portion of said centrifugal fan arrangement, wherein the pressure sensor means further comprises a ring duct with circumferentially spaced holes in fluid connection with the pressure sensor and circumferentially extending along an inner wall of said duct portion for spatially averaged air pressure measurement, wherein said circumferentially spaced holes and said pressure sensor are connected by pressure sensor air duct portions (11, 12) located outside said duct portion of said centrifugal fan arrangement, and wherein said pressure sensor air duct portions (11, 12) located outside said duct portion of said centrifugal fan arrangement comprise a junction, preferably a T-junction or Y-junction, where a first pressure sensor air duct portion connected to a first hole of said circumferentially spaced holes, a second pressure sensor air duct portion connected to a second hole of said circumferentially spaced holes and a third pressure sensor air duct portion connected to said pressure sensor are all fluidly connected to each other. wherein a ratio D/H between said maximum housing diameter D of said housing main portion and said maximum axial housing width H of said housing main portion is comprised between 20/10 and 35/10, and preferably between 25/10 and 32/10, wherein the centrifugal fan arrangement comprises pressure sensor means (PS1, PS2) for measuring air pressure within and/or outside said centrifugal fan arrangement, wherein the pressure sensor means comprises a pressure sensor located outside a duct portion of said centrifugal fan arrangement, wherein the pressure sensor means further comprises a ring duct with circumferentially spaced holes in fluid connection with the pressure sensor and circumferentially extending along an inner wall of said duct portion for spatially averaged air pressure measurement, wherein said circumferentially spaced holes and said pressure sensor are connected by pressure sensor air duct portions (11, 12) located outside said duct portion of said centrifugal fan arrangement, and wherein said pressure sensor air duct portions (11, 12) located outside said duct portion of said centrifugal fan arrangement comprise a junction, preferably a T-junction or Y-junction, where a first pressure sensor air duct portion connected to a first hole of said circumferentially spaced holes, a second pressure sensor air duct portion connected to a second hole of said circumferentially spaced holes and a third pressure sensor air duct portion connected to said pressure sensor are all fluidly connected to each other.