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VENTS VKPI 500х250 M1 EC

Centrifugal fans for rectangular ducts. Air flow up to 1590 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.
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Parameter VENTS VKPI 500х250 M1 EC
Measurement unit
Phase 1 ˜
Voltage 230 V
Power consumption 252 W
Frequency 50/60 Hz
Current 1.85 A
Air capacity 1590 m³/h
RPM 2500 min-1
Protection rating IP X4 -
EC motor yes -
Transported air temperature -25 ... +50 °С
Sound pressure level at 3 m distance 34 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 500х250 M1 EC
Parameter Value Measurement unit
В 500 mm
B1 520 mm
B3 564 mm
H 250 mm
H1 270 mm
H3 373 mm
L 560 mm
K - mm
F - 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 64 38 59 56 57 57 54 49 49 44 54
LwA to outlet dBA 35 35 57 56 58 58 52 48 46 43 53
LwA to environment dBA 54 37 51 48 45 45 40 34 31 34 44
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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