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Blauberg Box-I EC 50x30-1 max

Centrifugal fans in sound-insulated casing with EC motor. Maximum air capacity up to 2700 m³/h.
EAN codeEAN4058448061936
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Designation key
  • Additional characteristics
  • Accessories

Supply and extract ventilation systems installed in various premises. For arranging energy-saving and controllable ventilation systems. Compatible with 300x150 up to 1000x500 mm rectangular air ducts.


Atmospheric resistant galvanized steel casing. The casing is heat- and sound-insulated with 50 mm mineral wool. The fan is rated for continuous operation always connected to power mains. Fitted with standard 20 mm connecting flanges for connection to rectangular air ducts. Access cover on the casing for inspection and maintenance operations.


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.


The fan is designed for mounting inside rectangular air ducts and can be installed in any position. The fan flanges are connected to the air ducts through the bolts inserted into the flange holes. Suitable for mounting into round duct on intake flange with a round flange reducer (available upon separate order). When connecting the fans to the air ducts through the flexible anti-vibration connectors, as well as for sizes 600x300 and above, the fan must be secured to a mounting surface with supports, hanger brackets or brackets. While mounting provide enough space for accessing the cover for service operations.

Parameter Box-I EC 50x30-1 max Measurement unit
Voltage 230 V
Phase 1 ˜
Frequency 50/60 Hz
Power 553 W
Current 4.20 A
RPM 3100 min-1
Maximum air capacity 2700 m³/h
Maximum air flow 750 l/s
Sound pressure level at 3 m 43 dBА
Max. operating temperature -25...+50 °С
Motor IP rating IP54 -
Ingress protection rating IPX4 -
EC motor yes -
Casing material galvanized steel -
Outdoor mounting no -
Sound-insulated casing yes -
Air duct for rectangular air ducts -
Design centrifugal -
Type Exhaust, Supply -
SEC class -
Weight 29.0 kg
Mounting Inline -
ErP 2018 -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air capacity:
  • Pressure:
Operating point
  • Air capacity: --
  • Pressure: ---
Documents archieve
Documents archieve
Select a document type
  • Catalogues
  • Technical documentation
  • Certificates
Box-I EC - data sheet (pdf 1.58Mb)
Box-I EC - image (png 508.7Kb)
Box - user's manual (pdf 3.76Mb)
Box-I EC - user's manual (pdf 2.31Mb)

Type Overall dimensions [mm]
B B1 H H1 L
Box-I EC 50x30-1 max 564 500 424 300 560
Designation key
Designation key
Series Motor type Flange size (width x height) [cm] Phase Motor modifications
Box-I EC: electronically
commutated motor
30x15; 40x20; 50x25; 50x30; 60x30; 60x35; 70x40; 80x50; 90x50; 100x50 1: single-phase
3: three-phase
_: medium pressure motor
max: high pressure motor
Additional characteristics
Additional characteristics
Sound power level, A-weighted Octave frequency bands [Hz] LpA 3 m [dBA] LpA 1 m [dBA]
  Total 63 125 250  500   1000  2000 4000  8000     
 LwA to inlet [dBA] 75 45 70 67 68 68 64 59 58 54 64
LwA to outlet [dBA] 75 42 68 67 69 69 62 57 54 54 64
LwA to environment [dBA] 64 44 61 57 55 55 48 40 37 43 53
Silencer Filter boxes Electric heater Water heater Air damper Gravity damper Flexible antivibration connector Speed controller