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[ High Efficiency ] High strength impeller optimized by ternary flow CFD fluid simulation technology, reasonably designed flow runner combined with ultra-efficient motor create the high efficiency of the fan.
[ Low Noise ] The designer closely combines aerodynamics and sound source, and makes the blade angle and blade pattern fully adapt to the ternary flow field, which always ensures lower noise at the same air volume.
[ High Reliability ] Motors have F class insulation, and been tested for 3 months of 65℃ high temperature test and 40,000 hours of life test, which ensure worse-free quality.
[ Wide Application ] The products is used wherever outstanding performance is required, for example, fresh air system, greenhouse, ventilation with duct and more.
[ Variety of Models ] Available in dimensions of : 4”~12”, this allows for air flow rates of up to 1490m3/h and static pressure of up to 600Pa.
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Product Parameters |
Material: | Impeller:Galvanized sheet steel |
Direction of rotation: | Clockwise, seen on rotor |
Control input: | Motor wiring speed regulation |
Type of protection: | IP 23 |
Insulation class: | F |
Bearing: | Maintenance-free Ball bearings |
Approval: | CCC |
Amb.Temp: | -40~+65℃ |
Model | Curve | Voltage [V] | Frequency [Hz] | Speed [rpm] | Max Power [W] | Max Airflow [m3/h] | Noise [dB(A)] |
B250M.A035 | A | 220 | 50 | 2400 | 180.6 | 920.6 | 72.6 |
B250M.A034 | B | 120 | 60 | 2140 | 195.5 | 849.3 | 71.0 |
 | Ps [Pa] | Airflow [m3/h] | Speed [rpm] | Power [W] | ||
A | ① | 200 | 576.3 | 2260 | 180.6 | |
② | 250 | 492.8 | 2284 | 177.1 | ||
③ | 300 | 414.1 | 2337 | 170.4 | ||
④ | 355 | 340.2 | 2406 | 160.4 | ||
B | ⑤ | 100 | 588.3 | 1806 | 195.1 | |
⑥ | 150 | 440.4 | 1812 | 191.3 | ||
⑦ | 200 | 370.9 | 1906 | 188.5 | ||
⑧ | 250 | 317.3 | 2045 | 184.2 | ||
Application Scenarios |
Product Certificate |
UL Certification
UL is an authoritative safety certification for the North American market. It certifies that the AC circular duct fan complies with core North American standards for electrical safety, fire resistance and operational reliability. Suitable for ventilation projects in the United States, Canada and other regions, it reduces overseas safety and compliance risks and earns recognition from international customers.
CE Certification
CE is a mandatory conformity mark for the EU market. The AC circular duct fan meets key EU regulations including low voltage, electromagnetic compatibility and mechanical safety, covering the three dimensions of safety, health and environmental protection. It can be freely circulated and used throughout the 27 EU member states and the European Economic Area.
CCC Certification
CCC is a statutory mandatory certification for electrical products in China. It confirms that the AC circular duct fan fully meets national mandatory standards for electrical safety, structural strength and electromagnetic compatibility. It can be legally applied in various industrial and commercial ventilation and heat dissipation scenarios across China, ensuring safe and reliable equipment operation.
CQC Certification
CQC is a leading voluntary quality certification in China. It highlights the core advantages of the AC circular duct fan, such as high energy efficiency, stable operation and long service life. Ideal for high-end commercial and demanding industrial ventilation applications, it enhances brand quality competitiveness and improves acceptance in project selection.
RoHS Certification
RoHS is a key EU environmental certification that restricts the use of six hazardous substances including lead and mercury. The AC circular duct fan uses eco-friendly raw materials and compliant manufacturing processes, making it suitable for clean and high-demand ventilation scenarios such as medical, electronics and food industries, and fully meeting EU environmental requirements.
Reach Certification
REACH is a core EU standard for chemical substance compliance. It strictly controls the content of Substances of Very High Concern (SVHC) in the AC circular duct fan, with no risk of excessive substances. The product can enter the EU and European Economic Area without barriers, in line with the global trend of green industrial development.
FAQ |
Q: Where are AC circular duct fans mainly used?
A: They are widely used in residences, hotels, office buildings, shopping malls, factories, kitchens, basements, fresh air systems, etc., suitable for air supply, air exhaust and duct pressurization.
Q: What is the service life?
A: Under normal environment and proper use, the bearings and motor feature long service life, enabling long-term stable and continuous operation with simple maintenance.
Q: Is the fan noisy during operation?
A: Adopting low-noise motor and optimized air duct design, the fan runs smoothly with low noise, making it suitable for applications requiring high quietness such as hotels, offices and residences.
Green Agriculture Applications