MUB/T 042 500D4 IE2

Systemair Multibox acoustic centrifugal fan

Item Number: 33622

Please note: Speed controll by voltage, i.e. voltage transformers, is not possible!

In accordance with Commission Regulation (EC) no 640/2009 of the European Parliament - eco-design requirements for electric motors - the new international efficiency classes are binding as of 16 June 2011. These guidelines defined by CEMEP and EPACT are regarded as international standard for energy-saving high-efficiency motors for frequencies of 50 or 60 Hz and make the use of IE2 motors mandatory.

With this new and more efficient technology we offer our customers many advantages such as environmentally friendly operation, reduced energy consumption and hence lower emissions. IE2 motors have a higher efficiency even in part load operation and allow optimum adjustment to the operating point. In addition, the IE2 motors generate less noise and develop less heat, which has a positive influence on the efficiency and the cooling requirement of the motor. Please note: IE2 motors cannot be speed controlled by voltage, i.e. voltage transformers.

Up to 120°C medium temperature, continuous operation

Multi-functional use, e.g. for kitchen exhaust air

Modular system

Pre-assembled isolator is standard

Low sound level

Easy to maintain and reliable

High efficient IE2 motors

Speed-controllable via frequency converter

Motor outside the air stream

All MUB/T fans have impellers with backward curved blades, manufactured from aluminium, and IEC standard motors outside the air stream with efficiency class IE2 for all 400V three phase motors from 0.75 kW. The MUB/T fans are suitable for medium temperatures up to 120°C continuously. Motor protection by cold conductors or thermal contact, to be connected to an external motor protection device.

The casing consists of an aluminium frame with fibreglass reinforced plastic corners and double skin, galvanised steel panels with a 20 mm mineral wool insulation. Panels are removable, allowing flexible ventilation solutions - the air direction can easily be changed. With quick lock access door. The MUB bottom panel is shaped as a grease tray and incorporates a pre-mounted 1" drain plug. An isolator switch is mounted on the casing.

Several filter modules like f.e. activated carbon- or aluminum filters are available, calculated individually on the working point.

Technical parameters

Norminal data
Voltage (nominal) 400 V
Frequency 50 Hz
Phase(s) 3~
Input power 1,373 W
Starting current 23 A
Input current 2.87 A
Impeller speed 1,441 r.p.m.
Air flow max 2,234 L/s
Temperature of transported air max 120 °C
Sound data
Sound pressure level at 3m (20m² Sabin) 53 dB(A)
Enclosure class, motor IP55
Insulation class F
Dimensions and weights
Weight 61 kg
Motor type AC
Mid-frequency band, Hz
Hz Tot 63 125 250 500 1k 2k 4k 8k

LwA Inlet











LwA Outlet











LwA Surrounding











Measuring point: qv = 1,23 m3/s, Ps = 569 Pa





MUB/T 042 500





Multibox Thermo fan for medium temperatures up to 120 °C in continuous operation, reliable, for easy and direct installation in duct systems.


Casing frame construction made of aluminium hollow profiles and plastic corners for highest impact resistance. Double skin galvanised steel panels, thermally and sound insulated with a 20 mm layer of mineral wool, smooth inner sides. Removable service panel. Bottom panel is shaped as a grease tray and incorporates a pre-mounted 1" drain plug.


Free-running, backward curved circular impeller made of aluminium. Impeller acc. to VDI 2060, balancing quality Q 6.3, dynamically balanced in two planes acc. to ISO 21940-11.


Internal rotor motor, frequency inverter control, standard motor IE2 (IP55), outside the air flow. Integral thermal contacts with leads to a motor protection device.


Terminal box fitted on the motor.


Pre-assembled isolator switch.


Multifunctional use, square connection, intake and discharge side. Variable outlet direction, can be modified on site.


Suitable for kitchen exhaust.


Horizontal installation position only.


For indoor installation.


For outdoor installation with corresponding accessories.


CCM inlet MUB042 d400 Item Number: 311780 CCM inlet MUB042 d400

adapter plate complete

CCM inlet MUB042 d500 Item Number: 311781 CCM inlet MUB042 d500

adapter plate complete

CCM outlet MUB042 d400 Item Number: 311682 CCM outlet MUB042 d400

adapter plate complete

CCM outlet MUB042 d500 Item Number: 311683 CCM outlet MUB042 d500

adapter plate complete

CCMI outlet 042 d400 insul KIT Item Number: 313845 CCMI outlet 042 d400 insul KIT

with screws

CCMI outlet 042 d500 insul KIT Item Number: 313846 CCMI outlet 042 d500 insul KIT

with screws

FGV 042/586-586 flex. 120°C Item Number: 38361 FGV 042/586-586 flex. 120°C .
FGV 042/586-586 flex. conn. Item Number: 4605 FGV 042/586-586 flex. conn. .
FRQ-4A V2 Item Number: 36227 FRQ-4A V2

208-480V, Imax: 4A

FRQ5-4A+LED V2 Item Number: 36229 FRQ5-4A+LED V2

208-480V, Imax: 4A

FRQ5S-4A+LED V2 Item Number: 36233 FRQ5S-4A+LED V2

208-480V, Imax: 4A

FRQS-4A V2 Item Number: 36231 FRQS-4A V2

208-480V, Imax: 4A

FXDM5AM Frequency inv. IP54 Item Number: 31387 FXDM5AM Frequency inv. IP54

400V Imax: 5A,

M-SG 042/588x588 Item Number: 301345 M-SG 042/588x588

Znr: 465898, Index 3

SD-MUB Vibration pad set Item Number: 37324 SD-MUB Vibration pad set

TYP LEE 90x90, 4x

SDM Service Door MUB 042 comp. Item Number: 32572 SDM Service Door MUB 042 comp. .
U-EK230E Motor protection Item Number: 30199 U-EK230E Motor protection

Termistor Motor protection ATEX approved

UGS 042/400 adapter flex 120°C Item Number: 38368 UGS 042/400 adapter flex 120°C .
UGS 042/500 adapter flex 120°C Item Number: 38369 UGS 042/500 adapter flex 120°C .
UGS 042/500 adapter flex. Item Number: 4357 UGS 042/500 adapter flex. .
WSD 042 (730x730x70) complete Item Number: 31481 WSD 042 (730x730x70) complete .
WSG 042 MUB/T complete Item Number: 36071 WSG 042 MUB/T complete

585*585, internal: 505*505, 40mm frame