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Blauberg Box-R 125

Inline centrifugal fans. Maximum air capacity up to 242 m³/h.
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Additional characteristics

Supply and extract ventilation systems installed in small premises.High-pressure inline fan for ventilation systems installed in multi-level buildings and premises.Mounting in limited space.For multiport extract ventilation from several premises.Compatible with Ø 80 up to 200 mm round air ducts.


Steel supercompact casing covered with special polymer coating.Minimum casing height is only 90 mm.Aerodynamically shaped casing.External terminal block for power supply.Swivel cover provides easy access to the motor.Various casing modifications include from 1 to 6 inlet spigots.The connection spigots are equipped with rubber seals.


Single-phase three-speed external rotor motor with a centrifugal impeller made of galvanized steel.Impeller with forward curved blades for high pressure in the ductwork system.Turbine is designed to maintain permanent air flow irrespective of air resistance fluctuations in the ductworks.Equipped with ball bearings for longer service life.Integrated thermal protection with automatic restart.Dynamically balanced turbine.


Automatic fan speed control as a function of air resistance in the ductwork system provides permanent air flow rate.Three-button speed switch provides manual speed control. Available upon order.Smooth or step speed control with a thyristor or autotransformer speed controller (available upon order) connected to the maximum speed terminal of the motor.


Due to compact design the fan is the ideal solution for mounting in limited spaces, including the space behind false ceiling.Any mounting position.Wall or ceiling mounting with a fixing bracket supplied as a standard.Flexible air ducts are fixed on the fan spigots with clamps.

1 inlet pipe
Ø 80 or 100 mm
2 inlet pipes
Ø 80 or 100 mm
4 inlet pipes
Ø 80 or 100 mm
5 inlet pipes
Ø 80 or 100 mm
6 inlet pipes
Ø 80 or 100 mm
Parameter Box-R 125 Measurement unit
Voltage 1 ~ 230 V
Frequency 50 Hz
Current 0.22 A
Power 48 W
RPM 1430 min-1
Maximum air capacity 242 m³/h
Maximum air flow 67 l/s
Sound pressure level at a distance of 3 m 37 dBА
Max. operating temperature 50 °С
EC motor no -
Ingress protection rating IPX4 -
Casing material polymer coated steel -
Outdoor mounting no -
Sound-insulated casing no -
Air duct for round air ducts -
Connection diameter 125 mm
Design centrifugal -
Type Exhaust, Supply -
SEC class C -
Weight 5.2 kg
Mounting Inline -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air capacity:
  • Pressure:
Operating point
  • Air capacity: --
  • Pressure: ---
Documents archieve
Documents archieve
Box-R - data sheet (pdf 2.33Mb)
Box/Box-R - user's manual (pdf 1.73Mb)
Box-R - image (png 462.62Kb)

Type Dimensions [mm]
Box-R 125 124 124 270 141 397 299
Additional characteristics
Additional characteristics
Sound power level, A-weighted Octave frequency band [Hz] LpA, 3 m [dBA] LpA, 1 m [dBA]
Gen. 63 125 250 500 1000 2000 4000 8000
LwA to inlet [dBA] 67 39 56 55 57 62 62 59 52 47 57
LwA to outlet [dBA] 67 41 50 57 55 61 63 58 53 46 56
LwA to environment [dBA] 58 36 43 48 52 53 51 47 41 37 47
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