IRE 125 A1 | H. Östberg

IRE 125 A1 Updated: 2025-10-02

7900073 -

IRE 125 A1 aut tc

7900002 -

IRE 125 A1 man tc
Archived product

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.
To comply with the ErP 2018 regulation, a local demand controller must be used.

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 125 A1 aut tc 7900073		IRE 125 A1 man tc 7900002 Archived product
Parameter	Value	Unit	Value	Unit
Voltage	230	V	230	V
Phase	1	~	1	~
Frequency	50	Hz	50	Hz
Power	61	W	61	W
Current	0.27	A	0.27	A
Speed	1130	r.p.m.	1130	r.p.m.
Max. temperature of transported air	50	°C	50	°C
Max. temperature of transported air when speed controlled	50	°C	50	°C
Sound pressure level at 3 m	29	dB(A)	29	dB(A)
Weight	9.7	kg	9.7	kg
Enclosure class	44	IP	44	IP
Insulation class, motor	F		F
Capacitor	4	µF	4	µF
Duct connection	125	mm	125	mm
Max. flow @ 0Pa	61	l/s	61	l/s
Max. pressure	240	Pa	240	Pa
Voltage range	220-240	V	220-240	V

Parameter	Value	Unit
(a) Manufacturer	Östberg	-
(b) Model code	IRE 125 A1	-
(c) SEC average climate	-21.5	kWh/m²
SEC average climate, class	D	-
SEC warm climate	-6	kWh/m²
SEC warm climate, class	F	-
SEC cold climate	-48.5	kWh/m²
SEC cold climate, class	A+	-
(d) Declared type	RVU / UVU	-
(e) Type of drive	Multi-speed drive (accessory)	-
(f) Type of heat recovery	None	-
(g) Thermal efficiency	None	%
(h) Max. flow rate (@100Pa)	178	m³/h
(i) Power at max. flow rate	58	W
(j) Sound power level	35	dB LwA
(k) Reference flow rate	0.035	m³/s
(l) Reference pressure difference	184	Pa
(m) SPI	0.42	W/(m³/h)
(n) Type of control/ctrl factor	Local demand control(accessory)/0.65	-
(o) External (and internal) leakage rate	2.36 (N/A)	%
(p) Mixing rate	N/A	-
(q) Visual filter warning	N/A	-
(r) Instruction supply/exhaust grilles	See manual	-
(s) Disassembly instructions	fsp.ostberg.com	-
(t) Airflow sensitivity	N/A	-
(u) Air tightness	N/A	m/s
(v) AEC	273	kWh
(w) AHS average	2830	kWh
AHS warmer	1280	kWh
AHS colder	5536	kWh