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Blauberg Iso-RB 355

Sound-insulated centrifugal fan. Air flow up to 2235 m³/h.
EAN codeEAN4058448051494
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Designation key
  • Dimensions
  • Additional characteristics
Supply and exhaust ventilation systems in premises with high requirements to the noise level and with limited space for mounting.Possibility of space-restricted installation above suspended ceilings.Mounting into Ø 100–500 mm air ducts.
The fans are equipped with asynchronous motors with an external rotor and centrifugal impellers with backward curved blades.The motors are equipped with an integrated overheating protection with automatic restart.The use of ball bearings with specially selected lubricating oil guarantees low noise and makes the fan completely maintenance-free. 
The fan casing is made of aluzinc. For easy installation and operation, the top cover of the fan is secured with a special lock.Heat- and sound insulation is made of non-combustible 50 mm mineral wool layer. To ensure better noise absorption, the inner surface of the insulation is made of a perforated metal sheet.The round connecting spigots are rubber sealed.
Smooth or step speed control by means of a thyristor or autotransformer speed controller.Several fans can be connected to one controller, provided that the total power and operating current do not exceed the nominal parameters of the controller.
The round inline fans are designed for connection to round air ducts. The fans are installed at an air duct junction. The use of flexible connectors requires fixation of the fan on the building structure by means of supports, mounts or fixing brackets.The fan can be fixed in any position with respect to the air flow direction indicated by the arrow on the fan casing. While mounting the fan provide enough access for servicing and repair operations.
Parameter Iso-RB 355 Measurement unit
Voltage 230 V
Phase 1 ˜
Frequency 50 Hz
Current 0.89 A
Power 202 W
RPM 1330 min-1
Maximum air capacity 2235 m³/h
Maximum air flow 621 l/s
Sound pressure level at a distance of 3 m 48 dBА
EC motor no -
Temperature of transported air -25...+55 °С
Ingress protection rating IPX4 -
Motor IP rating IP44 -
Weight 58 kg
Casing material aluzinc -
Outdoor mounting no -
Sound-insulated casing yes -
Air duct for round air ducts -
Connection diameter 355 mm
Design centrifugal -
Type Exhaust, Supply -
Mounting Inline -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air capacity:
  • Pressure:
Operating point
  • Air capacity: --
  • Pressure: ---
Documents archieve
Documents archieve
Iso-RB - data sheet (pdf 2.79Mb)
Iso-RB - image (png 296.35Kb)
Iso-RB 355 - specification (pdf 33.09Kb)
Designation key
Designation key
Series Spigot diameter Motor Options
Iso-RB 100; 125; 150; 160; 200; 250; 315; 355; 400; 450; 500 max: high-powered motor;
L: low noise modification
W: power cable with IEC C14 plug

Model Dimensions [mm]
ØD B B1 H L L1 L2
Iso-RB 355 354 830 641 500 927 885 804
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] 78 61 72 77 66 61 53 53 41 58 68
LwA to outlet [dBA] 83 68 78 80 76 61 53 56 47 63 73
LwA to environment [dBA] 68 52 66 64 47 41 32 33 33 48 58
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