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Inline fan. Maximum air flow - 4630 m3/h.

  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Overall dimensions of brackets
  • Additional technical data
  • Designation key
  • Inline fans for supply and extract ventilation of various commercial and industrial premises requiring powerful air flow.
  • The fans are compatible with Ø 200, 355 and 400 mm air ducts.
  • The casing is made of polymer (for models 355 and 400, the casing is additionally reinforced with a metal housing).
  • Due to the conically-shaped polymer impeller with specially profiled blades the air stream circular velocity increases, which results in higher air flow and pressure as compared to characteristics of standard axial fans.
  • The specially designed diffuser, impeller and airflow rectifier at the fan outlet provide smooth air flow distribution and enable the best combination of high air flow, increased pressure and low noise.
  • The fan casing is equipped with an airtight terminal box for connection to power mains.
  • The units are equipped with highly efficient electronically commutated DC motors. These state-of-the-art motors are the most advanced solution in energy efficiency today. 
  • EC motors are characterised with high performance and optimum control across the entire speed range.
  • In addition to that, the efficiency of the electronically commutated motor reaches very impressive levels of up to 90 %.
  • The fan is controlled using a 0-10 V control signal. 
  • When the control signal value changes, the EC fan changes its rotation speed and provides air flow required for the ventilation system.
  • Several fans can be integrated into a single computer-driven control system. Custom designed software provides high accuracy control of the fans integrated into a network. The computer display shows all the system parameters and the operation mode can be set individually for each fan in the network.
  • The fans can be mounted at any place and at any angle within the ductwork system.
  • Several fans can be installed in one system in parallel to attain higher air flow or in series to increase operating pressure in the system.
  • The fan casing is equipped with fixing brackets for floor, wall or ceiling mounting.
  • The fans can be mounted using KM-Boost brackets of the appropriate size (purchased separately, available for 355 and 400 models).
Parameter BOOST 355 EC S
Measurement unit
Voltage 1~230 V
Frequency 50 Hz
Sound pressure level at 3 m distance 60 dBА
Power 701 W
Maximum air capacity 1286 l/s
Current 3.10 A
Maximum air capacity 4630 m³/h
RPM 3175 min-1
Max. transported air temperature -25...+55 °С
Protection rating IP X4 -
Motor protection rating IP44 -
Duct diameter 355 mm
Design mixed-flow -
Casing material polymer -
Duct for round air ducts -
Mounting Inline -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air flow:
  • Pressure:
Operating point
  • Air flow: --
  • Pressure: ---
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"VENTS BOOST 315/355/400 / VENTS BOOST 315/355/400 EC" user's manual 12-2021 (V208EN-06) (pdf 1.53Mb)
Download image "VENTS BOOST / VENTS BOOST EC (ErP 2018)" for your website (png 353.29Kb)
Download high quality image "VENTS BOOST / VENTS BOOST EC (ErP 2018)" (psd 4.22Mb)
"VENTS BOOST EC" product description 08-2021 (pdf 912.2Kb)
Download image "VENTS BOOST / VENTS BOOST 200 EC (ErP 2018)" for your website (png 359.49Kb)
Download high quality image "VENTS BOOST / VENTS BOOST 200 EC (ErP 2018)" (psd 4.13Mb)
"VENTS BOOST 150/160/200/250 / VENTS BOOST 150/160/200/250 EC" user's manual 07-2022 (V208-1EN-03) (pdf 1.25Mb)
Parameter Value Measurement unit
A 388 mm
∅D 350 mm
ØD1 390 mm
H 450 mm
Overall dimensions of brackets
Overall dimensions of brackets

Model Dimensions [mm]
A A1 H H1 B
KM-BOOST 355 EC 506 567 213 204 180
Additional technical data
Additional technical data
Sound-power level, A -filter Octave-frequency band [Hz] LpA, 3 m dBA LpA, 1 m dBA
  Hz Gen. 63 125 250 500 1000 2000 4000 8000
LwA to inlet dBA 88 74 82 79 79 83 80 75 66 68 78
LwA to outlet dBA 90 72 83 79 81 86 82 77 70 70 80
LwA to environment dBA 80 45 63 66 73 77 74 68 57 60 70
Designation key
Designation key
Series Air duct diameter [mm] Motor Options
VENTS BOOST ЕС 200, 355, 400 ЕС: electronically commutated synchronous motor
S: high-powered motor;
Un: speed controller with electronic thermostat and external temperature sensor fixed on 4 m cable;
К: mounting bracket;
R: power cable with a mains plug;
P: built-in smooth speed controller.
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