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Blauberg Centro-M 250 E

Inline centrifugal fans. Maximum air flow up to 900 m³/h.
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Additional characteristics


Supply and extract ventilation systems installed in various premises.Direct mounting inside air ductworks.Compatible with Ø 100 to 450 mm round air ducts.


The casing is made of steel with a special polymer coating.Aerodynamically shaped casing.External terminal box for connection to power mains.


Single-phase external rotor motor with a centrifugal impeller with backward curved blades.Equipped with ball bearings for longer service life.Overheating protection by built-in thermal switches with automatic restart.Dynamically balanced turbine.Some standard sizes have high-powered motors (Centro-M max).
For ventilation of premises with high requirements to noise level low-noise modifications are available (Centro-M L).


Smooth speed control with an external thyristor controller or step speed control with an external auto transformer (both available upon separate order).


FR: built-in smooth speed controller from 0 to 100 %. The fan is supplied with a pre-wired power cable with IEC plug as a standard. The cable modification with a standard electric plug is also available (FR1).
FR1: The fan is equipped with a power cable with a plug or euro plug. (For standard sizes 100-315).
G: smooth speed controller with an electronic thermostat and an external temperature sensor that is fixed on 4 m power cable. The fan is supplied with a pre-wired power cable with IEC plug as a standard. The cable modification with a standard electric plug is also available (G1).

max: high-powered motor.
L: low-powered motor.
E: energy-efficient motor.
W: the fan is equipped with a pre-wired power cable and IEC plug as a standard. Modification with a standard electric plug is available (W1).


Any mounting position.The fans with the connecting diameter from 100 up to 315 mm are fixed to wall or ceiling with mounting brackets supplied as a standard.The fans with the connecting diameter from 355 up to 450 mm are fixed with mounting brackets fixed on the casing.Flexible air ducts are fixed on the fan spigots with clamps.

Centro-M 100 – Centro-M 315 Centro-M 355 - Centro-M 450
Parameter Centro-M 250 E Measurement unit
Voltage 1 ~ 230 V
Frequency 50 Hz
Current 0.47 A
Power 95 W
RPM 2050 min-1
Maximum air capacity 900 m³/h
Maximum air flow 250 l/s
Sound pressure level at a distance of 3 m 47 dBА
EC motor no -
Temperature of transported air -25...+45 °С
Ingress protection rating IPX4 -
Motor IP rating IP44 -
Weight 6.2 kg
Casing material polymer coated steel -
Outdoor mounting no -
Sound-insulated casing no -
Air duct for round air ducts -
Connection diameter 250 mm
Design centrifugal -
Type Exhaust, Supply -
SEC class C -
Mounting Inline -
ErP 2018 -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air capacity:
  • Pressure:
Operating point
  • Air capacity: --
  • Pressure: ---
Documents archieve
Documents archieve
Centro-M - user manual (pdf 1.42Mb)
Centro-M - image (png 415.43Kb)
Centro-M - data sheet (pdf 2.36Mb)
Centro-M, Centro-MZ - certificate GS (pdf 449.98Kb)
Centro-M, Centro-MZ - certificate LVD (pdf 309.45Kb)


Model Dimensions [mm]
ØD ØD1 B B1 L L1 L2 L3
Centro-M 250 E 248 345 395 355 250 25 30 40
Additional characteristics
Additional characteristics
Sound power level, A-weighted Octave frequency bands [Hz] LpA, 3 m [dBA] LpA, 1 m [dBA]
Gen. 63 125 250 500 1000 2000 4000 8000
LwA to inlet [dBA] 89 60 76 83 81 83 79 75 64 68 78
LwA to outlet [dBA] 87 63 75 72 80 82 80 75 62 66 76
LwA to environment [dBA] 67 34 48 59 62 62 60 49 38 47 57
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