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Blauberg Centro-M EC 355

Inline centrifugal fan with EC motor. Maximum air flow up to 3450 m³/h.
EAN codeEAN4058448015403
  • Description
  • Characteristics
  • Downloads
  • Designation key
  • Dimensions
  • Additional diagrams
  • Accessories

Supply and extract ventilation systems installed in various premises. Direct mounting inside air ductworks. For arranging energy-saving and controllable ventilation systems. Compatible with Ø 100 to 400 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.


High-efficient direct current EC motor with external rotor and backward curved blades. EC technology meets the up-to-date requirements to energy-saving and controllable ventilation and provides up to 35 % energy saving as compared to asynchronous motors. EC motor ensures totally controllable speed range for the fan and has integrated overheating protection with automatic restart. EC motor has no friction and wearing parts as capacitor und brushes. Instead a maintenance-free EC controller electronic circuit board is used. The impeller is dynamically balanced. The fan is compatible with 50 Hz and 60 Hz power mains and the maximum speed does not depend on power mains frequency.


The fan speed is controlled with a 0–10 V control signal from the following sources:

  • integrated or external speed controller
  • controller with sensors
  • central BMS system.

The control signal value changes depending on air temperature, pressure, smoke concentration and other parameters. During signal value change the fan with EC motor correspondingly changes the rotations speed and delivers required air volume to the ventilation system. The computer central building management systems (BMS) enable integration of several EC motors in network and precise individual operation control for each fan.


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 355 and 400 mm are fixed with mounting brackets fixed on the casing. Flexible air ducts are fixed on the fan spigots with clamps.

Centro-M EC 100 – Centro-M EC 315 Centro-M EC 315 max, Centro-M EC 355, Centro-M EC 400
Parameter Centro-M EC 355 Measurement unit
Voltage 230 V
Phase 1 ˜
Frequency 50/60 Hz
Current 3.07 A
Power 693 W
RPM 2768 min-1
Maximum air flow 958 l/s
Maximum air flow 3450 m³/h
Sound pressure level at 3 m 62 dBА
Transported air temperature -25...+60 °С
Ingress protection rating IPX4 -
EC motor yes -
Weight 15.8 kg
Casing material polymer-coated steel -
Outdoor mounting no -
Sound-insulated casing no -
Air duct for round air ducts -
Connection diameter 355 mm
Design centrifugal -
Type Exhaust, Supply -
SEC class -
Mounting Inline -
ErP 2018 -
Documents archieve
Documents archieve
Select a document type
  • Catalogues
  • Technical documentation
  • Certificates
Centro-M EC - data sheet (pdf 1.15Mb)
Centro-M EC - user's manual (pdf 2.47Mb)
Centro-M EC 315 max, Centro-M EC 355, Centro-M EC 400 - image (png 584.88Kb)
Designation key
Designation key
Series Motor type Duct diameter [mm] Options
Centro-M EC: electronically commutated motor 100; 125; 150; 160; 200; 250; 315; 355; 400 max: high-powered motor
FR1: smooth speed controller adjustable from 0 to 100 % and power cable with mains plug
G1: speed controller, temperature controller with external temperature sensor, power cable with mains plug
W1: power cable with mains plug

Model Overall dimensions [mm]
∅ D ∅ D1 B B1 L L1 L2 L3
Centro-M EC 355 353 460 552 522 562 60 60 70
Additional diagrams
Additional diagrams

To comply with ErP 2018 it is necessary to use a speed controller and local demand control typology (connect the sensor).

Sound power level, A-weighted Total Octave frequency bands [Hz] LpA 3 m LpA 1 m
63 125 250 500 1000 2000 4000 8000
LwA to inlet [dBA] 90 59 67 79 84 85 83 80 64 69 79
LwA to outlet [dBA] 88 61 70 75 83 84 78 72 57 67 77
LwA to environment [dBA] 83 69 75 70 73 79 72 73 49 62 72
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