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Blauberg BLAUBOX DE 3300-21 Pro

Supply suspended ventilation unit. Maximum air flow up to 3350 m³/h.
EAN codeEAN4058448055850
  • Description
  • Characteristics
  • Downloads
  • Designation key
  • Accessories
  • Overall dimensions
  • Capacity diagram

Ventilation units for efficient supply ventilation in various premises.Controllable air supply, heating and filtration.Compatible with 400x200, 500x300 and 600x350 mm rectangular air ducts.


The casing is made of double-skinned aluzinc panels, internally filled with 50 mm mineral wool layer for heat and sound insulation.The casing has fixing brackets with vibration absorbing connectors for easy installation.The hinged casing panel ensures easy access to the internals for cleaning, filter replacement and other maintenance operations.



Asynchronous external rotor motor and centrifugal high-pressure impeller with backward curved blades is used for air supply.Integrated motor overheating protection with automatic restart.Dynamically balanced impeller.Equipped with ball bearings for longer service life.Reliable and quiet operation.


The built-in G4 supply filter provides air filtration.


The units are equipped with an electric heater for operation during cold seasons at low outside temperature.Two integrated overheat protection thermostats, one actuated at +60 °C with automatic restart and the other one actuated at +90 °C with manual restart.


The unit is suitable for mounting on the floor, ceiling mounting or wall mounting with fixing brackets in any mounting position except for the vertical one with air flow downwards.Wiring via the terminal block in the terminal box.The correct mounted unit must provide free access to the hinged panel for servicing and filter replacement.


The units incorporate an integrated control system with a wall-mounted control panel and LCD display.The standard delivery set includes a 10 m cable for connection of the unit and the control panel.Control panel functions:

  • Activating/deactivating the unit.
  • Setting low, medium and high speeds for the supply fan. Air flow control.
  • Supply air setting and maintaining.
  • Display of indoor air temperature.
  • Display of errors (alarms) and filter replacement indication.
  • Setting or week-scheduled operation of the unit.
Automation functions:
  • Overheating protection of the electric heating elements.
  • Disabling heater activation during the fan shutoff.
  • Filter clogging control with a pressostat.
All the operation parameters are individually adjustable.
Parameter BLAUBOX DE 3300-21 Pro Measurement unit
Connected air duct size 600х350 mm
Voltage 400 V
Phase 3 ˜
Frequency 50 Hz
Fan power 1.33 kW
Fan current 2.4 A
Electric heater current 30.0 A
Current 32.4 A
RPM 2730 min-1
Electric heater power 21000 W
Maximum air flow 931 l/s
Maximum air flow 3350 m³/h
Total unit power 22330 W
Sound pressure level at 3 m 57 dBА
Transported air temperature -25...+40 °С
Insulation 50 mm mineral wool mm
Filter G4 -
EC motor no -
Weight 91 kg
Casing material aluzinc -
Outdoor mounting no -
Sound-insulated casing yes -
Air duct for rectangular air ducts -
Design centrifugal -
Type Supply -
Mounting ceiling mounting, wall mounting, floor mounting -
ErP 2016, 2018 -
Documents archieve
Documents archieve
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BLAUBOX DE Pro - data sheet (pdf 573.82Kb)
BLAUBOX DE Pro - image (png 341.22Kb)
Designation key
Designation key
Series Casing modification Heater type Rated air flow [m³/h]   Electric heater power [kW] Control
BLAUBOX D: Suspended mounting E: electric heater 1300; 2500; 3300 12; 18; 21 Pro: with control panel
    BLAUBOX DE 3300-21 Pro
G4 panel filter FP 545x390x47 G4
Silencer SD 60x35
Duct cooling unit KFK 60x35-3
Duct cooling unit KWK 60x35-3
Air flow dampers SL 60x35
Flexible anti-vibration connector EVA 60x35
Air damper electric actuator LF230
Air damper electric actuator TF230
Overall dimensions
Overall dimensions

Model Overall dimensions [mm]
B B1 B2 B3 H H1 H2 L L1
BLAUBOX DE 3300-21 Pro 600 620 888 744 350 370 500 1252 1212
Capacity diagram
Capacity diagram

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