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VENTS Stream 100/125 EC S

Sound- and heat-insulated mixed flow duct fan with air flow up to 450 m³/h and with EC motor.

  • Description
  • Characteristics
  • Downloads
  • Dimensions
  • Capacity diagram
  • Dimensions
  • Designation key
  • The VENTS Stream EC series of duct fans is available in a special sound-insulated casing that ensures silent fan operation with high aerodynamic performance. Compatible with Ø100 to 160 mm air ducts.
  • The VENTS Stream EC fans combine wide capabilities and high technical parameters of axial and centrifugal fans, providing powerful air flow and high pressure as well as cost-effectiveness and manageability of the EC motor.
  • 100% variable speed, multiple fans can be connected to a computer control system equipped with sensors.
  • Application: intended for supply and exhaust ventilation systems of different commercial and industrial premises with high demands on energy efficiency and noise level (libraries, conference halls, educational institutions, kindergartens etc.).
  • The outer casing is made of high quality and durable plastic.
  • The internal perforation of the casing allows sound waves to pass through, directing them at a certain angle onto a layer of sound-insulating material.
  • Heat- and sound-insulation of the casing are made of a 50 mm layer of non-flammable mineral wool.
  • The special perforation of the casing and the sound-absorbing material ensure that sound is attenuated over a wide frequency range.
  • Due to the conic impeller and special blade profiling the circumferential air speed increases thus providing higher air pressure and capacity as compared to standard axial fans.
  • The diffuser, the specially profiled impeller and the directing vanes at the outlet of the fan casing distribute air flow in such a way as to attain the best combination of high performance and high pressure at low noise level.
  • The fan casing is equipped with an outer airtight terminal box for connection to power mains.
  • The units are equipped with highly efficient electronically commutated EC 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 with the 0-10 V control signal (capacity control is performed depending on the temperature, humidity, pressure and other parameters).
  • When the value of the control factor changes, the EC fan changes the rotation speed and supplies exactly the amount of air required by the ventilation system.
  • Maximum fan speed does not depend on the available current frequency and is suitable for operation both at 50 and 60 Hz. 
  • 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 are intended for mounting to round air ducts.
  • The fan casing has mounting brackets for floor, wall or ceiling mounting.
  • Any installation angle relative to the fan axis is permissible.
  • Access for the fan maintenance shall be provided during mounting. 
  • For wiring installation and mounting of the fan follow the guidelines in the user's manual and wiring diagram on the terminal box.
  • Several fans may be installed in one system in parallel to attain higher air capacity or in series to increase operating pressure in the system.
Parameter Stream 100/125 EC S
Stream 100/125 EC S
Measurement unit
Spigot diameter 100 125 mm
Phase 1 1 ˜
Voltage 230 230 V
Frequency 50/60 50/60 Hz
Current 0.36 0.37 A
Power 39 39 W
Maximum air capacity 82 125 l/s
Maximum air capacity 295 450 m³/h
Sound pressure level at 3 m Sound pressure level at 3 m 31 33 dBА
RPM 3168 3138 min-1
Protection rating IP X4 IP X4 -
Motor protection rating IP44 IP44 -
EC motor yes yes -
Transported air temperature -25 ... +55 -25 ... +55 °С
Weight 5 5 kg
Design mixed-flow mixed-flow -
Sound- and heat-insulated casing yes yes -
Casing material plastic plastic -
Outdoor mounting no no -
Duct for round air ducts for round air ducts -
Type supply and exhaust supply and exhaust -
Mounting Inline Inline -
Files archieve
Select document type
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  • Technical documentation
"VENTS Stream (EC)" user's manual 03-2023 (V238EN-03) (pdf 3.2Mb)
"VENTS Stream EC" product description 02-2022 (pdf 954.01Kb)
Download high quality image "VENTS Stream EC (ErP 2018)" (psd 3.56Mb)
Download image "VENTS Stream EC (ErP 2018)" for your website (png 200.87Kb)
Parameter Value Measurement unit
Capacity diagram
Capacity diagram
Stream 100/125 EC S (spigot 100 mm)  
Sound power level Octave frequency bands [Hz] LpA, 3 m dBA LpA, 1 m dBA
  Hz Gen. 63 125 250 500 1000 2000 4000 8000
LwA to inlet dBA 60 36 55 58 47 40 37 41 33 39 49
LwA to outlet dBA 59 32 51 58 46 36 35 41 35 38 48
LwA to environment dBA 52 32 49 48 39 34 30 29 24 31 41
Stream 100/125 EC S (spigot 125 mm)  
Sound power level Octave frequency bands [Hz] LpA, 3 m dBA LpA, 1 m dBA
  Hz Gen. 63 125 250 500 1000 2000 4000 8000
LwA to inlet dBA 63 39 58 61 50 42 39 43 35 43 53
LwA to outlet dBA 60 33 53 59 47 37 36 42 36 40 50
LwA to environment dBA 54 34 51 50 41 35 30 30 25 33 43


Type Dimensions [mm]
Stream 100/125 EC S (spigot 100 mm) 100 253 752 273
Stream 100/125 EC S (spigot 125 mm) 125 253 689 273
Designation key
Designation key
Series Air duct diameter Motor type Options
VENTS Stream: mixed-flow fan in sound-insulated casing 100/125
ЕС: synchronous electronically commutated motor S: high-powered motor Un: speed controller with an electronic thermostat and external temperature sensor fixed on 4 m cable. Equipped with a power cord and an electric plug. Temperature-based operation logic.
R: power cord with mains plug.
built-in smooth speed controller.
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