IRE 250 B1 | H. Östberg

IRE 250 B1 Updated: 2025-10-02

7900094 -

IRE 250 B1 aut tc

7900018 -

IRE 250 B1 man tc

Insulated duct fan with circular connections.
Equipped with 50 mm of thermal and acoustic insulation makes it ideal for handling cold air.
Designed for high pressure and long, complicated duct runs.
The design prioritise functionality, durability and longevity.
Impeller with forward curved blades.
The external rotor motor has maintenance-free sealed ball-bearings.
Integrated motor protection.
Junction box has enclosure class IP 54.
For speed control a transformer or electronic speed controller can be connected.
The housing is manufactured from galvanized sheet steel.
Duct connections are equipped with rubber seals.
The fan is intended to be installed in a duct system.
A duct connected fan can be installed outside or in damp environments.

Generating diagrams...

Variable control

User input

Air Flow (l/s)

External static pressure (Pa)

Data

Air Flow (l/s)

External static pressure (Pa)

Power (W)

Speed (r.p.m.)

Current (A)

Voltage (V)

230

Efficiency (%)

SFPv (kW/m3/s)

Change the "User input" by dragging the point, or by entering new values.

Generating diagrams...

	IRE 250 B1 aut tc 7900094		IRE 250 B1 man tc 7900018
Parameter	Value	Unit	Value	Unit
Voltage	230	V	230	V
Phase	1	~	1	~
Frequency	50	Hz	50	Hz
Power	138	W	138	W
Current	0.63	A	0.63	A
Speed	900	r.p.m.	900	r.p.m.
Max. temperature of transported air	70	°C	70	°C
Max. temperature of transported air when speed controlled	70	°C	70	°C
Sound pressure level at 3 m	37	dB(A)	37	dB(A)
Weight	23.4	kg	23.4	kg
Enclosure class	44	IP	44	IP
Insulation class, motor	F		F
Capacitor	3	µF	3	µF
Duct connection	250	mm	250	mm
Max. flow @ 0Pa	264	l/s	264	l/s
Max. pressure	131	Pa	131	Pa
Voltage range	220-240	V	220-240	V