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Blauberg Iso-B 250

Sound-insulated inline centrifugal fans. Maximum air flow up to 1300 m³/h.
EAN codeEAN4058448016325
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Designation key

Supply and extract ventilation systems installed in premises with high requirements to the noise level.Suitable for limited mounting space.Compatible with ∅ 100 up to 315 mm round air ducts.

max: high-powered motor.G1: speed controller, temperature controller with external temperature sensor (cable length 4 m), power cable with mains plug.GI1: speed controller, temperature controller with integrated temperature sensor and power cable with mains plug.The G1 and GI1 modifications enable automatic speed control depending on indoor temperature. The optimal ventilation solution for premises requiring permanent temperature control as greenhouses, orangeries, etc.W1: power cable with mains plug.


Galvanized steel casing internally filled with 30 mm thermal- and soundinsulating layer made of non-flammable foamed polyurethane.The connection spigots are equipped with rubber seals.Fixing brackets for easy mounting.


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


Two-pole external rotor asynchronous motor with centrifugal impeller and backward curved blades.The motor is installed on specially designed vibration-damping mounts to absorb vibration and noise.Equipped with ball bearings for longer service life.Integrated thermal protection with automatic restart.Dynamically balanced impeller.


Fixed to wall or ceiling with a fixing bracket supplied as a standard.Flexible air ducts are fixed on the fan spigots with clamps.Power is supplied through an external terminal box.

Parameter Iso-B 250 Measurement unit
Voltage 230 V
Frequency 50 Hz
Current 0.87 A
Power 198 W
RPM 2420 min-1
Maximum air capacity 1300 m³/h
Sound pressure level at a distance of 3 m 41 dBА
Max. operating temperature -25 +50 °С
EC motor no -
Ingress protection rating IPX4 -
Casing material galvanized steel -
Outdoor mounting no -
Sound-insulated casing yes -
Air duct for round air ducts -
Design centrifugal -
Type Exhaust, Supply -
SEC class B -
Weight 12.5 kg
Mounting Inline -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air capacity:
  • Pressure:
Operating point
  • Air capacity: --
  • Pressure: ---
Documents archieve
Documents archieve
Iso-B - data sheet (pdf 978.96Kb)
Iso-B - user manual (pdf 2.5Mb)
Iso-B - image (png 558.16Kb)
Iso-B - certificate GS (pdf 260Kb)

Type Dimensions [mm]
D B B1 H L L1 L2
Iso-B 250 249 432 368 287 588 506 480
Designation key
Designation key
Series Spigot diameter [mm] Motor modifications Options
Iso-B 100; 125; 150; 160; 200; 250; 315 max: high-powered motor G1: speed controller, temperature controller with external temperature sensor, power cable with mains plug
GI1: speed controller, temperature controller with integrated temperature sensor and power cable mains plug
W1: power cable with mains plug