Sound-insulated ventilation box

DSR 35-2 S

No longer available for delivery
Article number: 0080.0622
Manufacturer: MAICO
Sound-insulated ventilation box with swivelling fan, DN 355, three-phase AC
Application examples: Commercial premises, Showroom, Office, Foreman's office, Changing room
DSR 35-2 S IM0009647.PNG Sound-insulated ventilation box with swivelling fan, DN 355, three-phase AC

Characteristic curve

DSR 35-2 S - Characteristic curve

Dimensioned drawing

DSR 35-2 S - Dimensioned drawing [mm]

Technical data

DSR 35-2 S - Technical data

Article DSR 35-2 S
Air flow volume 2.865 m³/h
Rotating speed 1.360 1/min
Speed controllable
Type of voltage Three-phase AC
Rated voltage 400 V
Nominal output 475 W
Inom 1,18 A
Imax 1,2 A
Degree of protection IP X4
Mains cable 5 / 1,5 mm²
Installation position vertical
Housing material Sheet steel, galvanised
Weight 46,3 kg
Swivelling fan
Nominal size 355 mm
Width 680 mm
Height 490 mm
Depth 750 mm
Airstream temperature at nominal current -20 °C
Airstream temperature at IMax 60 °C
Ambient temperature -20 °C
Packing unit 1 piece
Range C
GTIN (EAN) 4012799990413
Article number 0080.0622


63 Hz

125 Hz

250 Hz

500 Hz

1 kHz

2 kHz

4 kHz

8 kHz


LWA5, S5 (dB(A))









LWA6, S5 (dB(A))









LWA2, S5 (dB(A))









LWA2= housing sound power level in dB.

LWA5= free inlet sound power level in dB.

LWA6= free outlet sound power level in dB.


Product description


DSR 35-2 S

short description

Sound-insulated ventilation box with swivelling fan, DN 355, three-phase AC

Product description


  • Optimised efficiency, low maintenance costs.
  • Removable housing cover with clip-locks.
  • Inlet and outlet side connection couplings for direct installation in ventilation ducts.
  • With sound absorbing rock wool, laminated with silk glass, to meet the increased requirements of especially low noise levels.

Air flow direction

  • The airsteam direction is indicated by an arrow marked on the housing.


  • External rotor-capacitor motor.
  • Robust motor with ball bearings, maintenance-free.
  • The motor's standard rubber mounting prevents vibrations being transferred to the housing.
  • Temperature classes B or F.
  • IP X4 degree of protection with closed housing cover.

AC motor

  • Thermal overload protection as a standard feature.

Three-phase AC motor

  • Potential-free terminal connections, which must be connected to an MV 25 protective motor switch or the control circuit of a contactor.

Mounting instructions

  • Can be fitted in any position.

Electrical connection

  • Terminal box at front.

Safety instructions

  • The fan may be operated only if the protection against accidental contact with the impeller is guaranteed to be in accordance with DIN EN ISO 13857 for fans with free inlet or outlet. To do this, fit a protective grille.

Table of contents

Wiring diagram

DSR 35-2 S - Wiring diagram

Duct fan with DRH 25-9R, DRH 31-12R, DRH 35-12R and DRH 40-12R electric air heaters

S1 - system on

S - sensor

US16 - all-pole isolating switch (contactor)

ERR... centrifugal duct fan

DRH...R electric air heater: DRH 25-9R, DRH 31-12R, DRH 35-12R, DRH 40-12R

B=Int/ext bridge must be closed

C=Do not change potentiometer setting

D=Setpoint potentiometer for MIN limitation

E=Setpoint potentiometer for MAX limitation

F=Bridge for MAX limitation, bridge must be closed!

G=If bridge is closed, MIN limitation is also active

FR30P - ext. setpoint controller (0-30°C) with room sensor

FL60P - ext. channel sensor for MIN, MAX limitation

LW9 - air flow monitor (in position N)

Installation of LW9 sensor on incoming side of air heater

0-30°C setpoint setting and recording of room temperature with FR30P

0-60°C min/max limitation in supply air channel with FL60P

Predecessor - successor

DSR 35-2 S - Predecessor

Product type Name Art. No. Action
Sound-insulated ventilation box DSR 35 S No longer available for delivery 0080.0232
  • On the notes

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