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VENTS VKPI 600x350 L3 EC

Centrifugal fans for rectangular ducts. Air flow up to 4290 m³/h.

  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Dimensions
  • Additional characteristics
  • Designation key
  • Supply and exhaust ventilation systems for commercial, office and other public or industrial premises requiring an economical solution, controlled ventilation system and low noise level.
  • EC motors applied in VKP fans reduce energy demand by 1.5 times and ensure high aerodynamic performance and low noise level.
  • Such characteristics are of special importance for ventilation of banks, supermarkets, restaurants, hotels and other public facilities including swimming pool ventilation.
  • The fans are compatible with 300х150–1000х500 mm rectangular ducts.
  • Fan casing is made of galvanized steel and is heatand sound-insulated with 50 mm mineral wool layer. 
  • All inner components are interconnected by means of rivets.
  • The fan is equipped with 20 mm standard flanges.
  • The impellers with backward curved blades are powered with high efficient electronically commutated (EC) direct current motors with an external rotor.

  • As of today, such motor type is the most advanced solution for energy saving.
  • EC motors are featured by high performance and the optimal control over the whole range of fan speeds.
  • Premium efficiency reaching up to 90 % is an absolute advantage of electronically commutated motors.
  • The fan is controlled with the external control signal 0-10 V (air capacity as a function of temperature level, pressure and smoke conditions etc).
  • Should the control value factor get changed the EC-motor changes its speed and the fan boosts as much air capacity to the ventilation system as required.
  • Maximum speed of the fan does not depend on the current frequency and it can operate at 50 or 60 Hz mains supply.
  • The fans are mounted into the rectangular ducts and require no special fixing in sizes 300x150–500x300.
  • For large size fans and in case of connection through the flexible connectors, the fan is fixed to a building by means of supports, suspension brackets or fixation brackets.
  • The fans can be mounted in any position with respect to the airflow direction which is indicated with a pointer on the casing.
  • Access for the fan maintenance shall be provided.
  • The casing is provided with the removable access door for inspection and maintenance purposes.
VENTS VKPI EC fan school class ventilation example VENTS VKPI EC fan car parking stand ventilation example
Parameter VENTS VKPI 600x350 L3 EC
Measurement unit
Phase 3 ˜
Voltage 400 V
Power consumption 1308 W
Frequency 50/60 Hz
Current 2.35 A
Air capacity 4290 m³/h
RPM 3160 min-1
Protection rating IP X4 -
EC motor yes -
Transported air temperature -25 ... +50 °С
Sound pressure level at 3 m distance 40 dBА
Motor protection IP54 -
Casing material galvanized steel -
Capacity diagram
Capacity diagram
  • Selection method:
  • Air flow:
  • Pressure:
Operating point
  • Air flow: --
  • Pressure: ---
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Download high quality image "VENTS VKPI EC (ErP 2018)" (psd 2.79Mb)
"VENTS VKPI EC" product description 03-2021 (pdf 1.99Mb)
Download image "VENTS VKPI EC (ErP 2018)" for your website (png 439.34Kb)
"VENTS VKPI EC" user's manual 01-2021 (V210EN-01) (pdf 2.06Mb)
VENTS VKPI 600x350 L3 EC
Parameter Value Measurement unit
В 600 mm
B1 620 mm
B3 783 mm
H 350 mm
H1 370 mm
H3 664 mm
L 752 mm
K 450 mm
F 750 mm
Additional characteristics
Additional characteristics
Sound power level, A-filter applied Sound pressure level at 3 meters, A-filter applied Sound pressure level at 1 meter, A-filter applied
Sound power level Gen. Octave frequency band [Hz]
  Hz 63 125 250 500 1000 2000 4000 8000 LpA, 3 m [dBA] LpA, 1 m [dBA]
LwA to inlet dBA 72 41 66 64 64 64 62 56 55 51 61
LwA to outlet dBA 70 39 64 62 64 64 59 54 51 50 60
LwA to environment dBA 60 40 58 53 49 49 45 38 33 40 50
Designation key
Designation key
Series Rectangular air duct diameter (WxH) [mm] Motor modification Phase Motor
VKP – centrifugal fan
VKPI – centrifugal fan in sound-insulated casing 
300х150, 400х200, 500х250, 500х300, 600х300, 600х350, 700х400, 800х500, 900х500, 1000х500 L: medium pressure motor
M: high pressure motor 
1: single phase
3: three phase
EC: synchronous electronically commutated motor
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