Privacy Policy (GDPR)
Not registered yet? Take advantages of registration:
Products saving in a binding to the projects
Product consultation from our experts - Online
By using this form, you confirm that you have read the site terms of use Terms of use and completely accept the terms of use

VENTS Boost-I 250

Inline mixed-flow fans in sound- and heat-insulated casing. Air flow up to 1670 m³/h.

  • Description
  • Characteristics
  • Downloads
  • Dimensions
  • Additional characteristics
  • Designation key
  • The inline VENTS Boost-I fans are enclosed in a specially designed sound-insulated casing that ensures silent fan operation in combination with high aerodynamic characteristics. The fans are compatible with round air ducts from Ø 200 up to 250 mm.
  • The VENTS Boost-I fans combine wide capabilities and high performance characteristics of both axial and centrifugal fans, thus providing powerful air flow and high pressure.
  • The VENTS Boost-I fans are recommended as a component of the air handling systems for various commercial and industrial premises with high requirements to noise level, i.e. libraries, conference halls, educational institutions, kindergartens, etc.
  • The external casing is made of galvanized steel. Sound and heat insulation is provided by 30 mm acoustic material.
  • Due to the improved mixed type impeller, which is a hybrid of axial and centrifugal impeller, the Boost-I has low power consumption and noise level with high performance.
  • 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 VENTS Boost-I fans are equipped with single-phase high-efficiency three-speed asynchronous motors with low power consumption.
  • The motor is equipped with thermal switches for overheating protection.
  • The ball bearings ensure a long service life (about 40 000 hours of continuous operation).
  • The motor ingress protection rating is IPX4.
  • The three-speed motor can be controlled using a builtin switch (option V) or an external switch P3-5.0 (purchased separately).
  • The fans are designed to be used with round air ducts. The fan casing has mounting brackets for convenient installation onto the ceiling. The ducts can be fitted at any angle relative to the fan axis. Make sure to provide sufficient maintenance access during fan installation.
  • Electrical connection and installation must be performed in accordance with the instruction manual and the electrical connections diagram applied to the terminal box.
  • A single system may have several fans installed in parallel to boost the output capacity or in series to boost the working pressure.
Parameter Boost-I 250
Boost-I 250
Boost-I 250
Measurement unit
Speed min mid max -
Voltage 230 230 230 V
Phase 1 1 1 ˜
Power consumption 144 173 188 W
Frequency 50 50 50 Hz
Current 0.7 0.81 0.84 A
Maximum air capacity 280 390 464 l/s
Air capacity 1007 1404 1670 m³/h
Maximum air capacity 1007 1404 1670 m³/h
RPM 2292 2626 2876 min-1
Sound pressure level at 3 m 38 43 45 dBА
Protection rating IP X4 IP X4 IP X4 -
Duct diameter 250 250 250 mm
EC motor no no no -
Motor protection rating IP 20 IP 20 IP 20 -
Design mixed-flow mixed-flow mixed-flow -
Transported air temperature -25 ... +55 -25 ... +55 -25 ... +55 °С
Casing material galvanized steel galvanized steel galvanized steel -
Weight 9.5 9.5 9.5 kg
Outdoor mounting no no no -
Sound-insulated casing yes yes yes -
Duct for round air ducts for round air ducts for round air ducts -
Type supply and exhaust supply and exhaust supply and exhaust -
Mounting Inline Inline Inline -
Files archieve
Select document type
  • Advertising and printing products
  • Certificates
  • Technical documentation
"VENTS Boost-I" product description 05-2023 (pdf 820.55Kb)
Download high quality image "VENTS Boost-I (EC)" (psd 4.33Mb)
Download image "VENTS Boost-I (EC)" for your website (png 315.63Kb)
"VENTS Boost-I (EC)" user's manual 09-2022 (V208-2EN-01) (pdf 895.25Kb)
VENTS Boost-I 250
Parameter Value Measurement unit
∅D 249 mm
∅D1 337 mm
B 389 mm
L 601 mm
L1 739 mm
Additional characteristics
Additional characteristics
Sound power level [A-filter] Sound pressure level at a distance of 3 m [A-filter] Sound pressure level at a distance of 1 m [A-filter]
Sound power level General 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 70 45 56 62 64 63 60 62 57 49 59
LwA to outlet dBA 71 41 49 61 64 67 65 60 54 51 61
LwA to environment dBA 65 57 55 60 58 55 54 47 39 45 55
Designation key
Designation key
Series Air duct diameter Options
VENTS Boost-I 200; 250 Т: turn-off delay timer adjustable from 2 to 30 minutes.
U: speed controller with an electronic thermostat and a temperature sensor integrated inside an air duct. Temperature-based operation logic.
Un: speed controller with an electronic thermostat and a temperature sensor fixed on a 4-meter cable. Temperature-based operation logic.
R: power cord with a mains plug.
V: three-position speed switch.
Share your opinion

Is our site helpful for your business development?