Developed in-house for consistent quality and long-term supply, Longwell 4–8 inch EC inline duct fan helps you reduce sourcing costs, accelerate prototype validation, and scale confidently from sampling to mass production.
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Available in four popular sizes to meet different airflow, pressure and installation requirements for residential, commercial and OEM ventilation systems.
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Longwell EC inline duct fans are equipped with electronically commutated (EC) motors featuring permanent magnet technology. They deliver higher efficiency, lower energy consumption, and precise speed control while maintaining quiet and reliable operation compared to conventional AC motors.
With a maximum speed of up to 2605 RPM, the EC motor and optimized impeller work together to deliver consistent airflow, reliable static pressure and efficient ventilation performance.
With operating noise as low as 50.8 dB(A), Longwell EC duct fan is ideal for ventilation in quiet offices, residential, and commercial environments, significantly enhancing acoustic comfort.
High-purity copper windings reduce 40% power loss and enhance overall efficiency. They offer better stability under continuous loads without performance degradation due to overheating.
The built-in thermal protection function ensures safe operation of the device. Each impeller of Longwell EC duct fan undergoes dynamic balancing to reduce vibration and bearing wear.
From precision data center cooling to heavy-duty industrial ventilation, our high-efficiency fan systems are purpose-built to deliver reliable aerodynamic performance in the world’s most demanding environments.
● Size: 4-8 inches
● Supply Voltage: 110V to 240V
● Frequency: 50/60Hz
● Protection Level: IP44, IP54, IP55
● Power: 20.6 W-37.7 W
● Air Flow: 118.16 CFM-258.61 CFM
● Motor Type: EC Motor
● Speed: 2605 rpm – 2464rfm
● Static Air Pressure: 138Pa-223Pa
● Operation Temperature: -25℃ to 70℃
● Certificating: All necessary certifications suitable for USA & Europe, ETL, UL, CE, RoHS, ISO 19001, ISO 14001, BSCI
Unlike legacy AC inline fans that operate at fixed speeds and waste power through high thermal dissipation, EC motors integrate permanent magnets with onboard microprocessors. This allows the ventilation system to modulate output dynamically based on real-time static pressure and airflow demands.
For OEM projects and facility upgrades, transitioning to EC technology yields a measurable return on investment by mitigating high-pitched electromagnetic hums, expanding equipment service life, and cutting operational footprints under continuous duty.
EC Inline Fan | Traditional AC Fan |
Lower Power Consumption | Higher Energy Use |
Variable Speed | Fixed Speed |
Lower Operating Noise | Higher Noise |
Longer Service Life | Shorter Life |
Better Efficiency | Lower Efficiency |
——Designed to help OEM manufacturers reduce development costs, shorten validation cycles and scale production with confidence.
Longwell develops and manufactures its own EC motor platform, allowing faster product optimization, consistent quality and flexible customization for OEM ventilation equipment.
Starting from just USD 21, our EC inline duct fans help manufacturers evaluate new designs and validate projects with significantly lower upfront investment.
Reduce development time with fast sample availability, helping engineering teams complete testing, verification and product integration more efficiently.
From prototype to mass production, Longwell provides stable manufacturing capacity, consistent quality and dependable delivery for OEM customers worldwide.
EC motor technology delivers efficient airflow, precise speed control and lower operating costs compared with conventional AC duct fans.
Available with customized voltage, speed control, cable length, connectors and branding to meet different equipment and market requirements.
To select the most suitable duct fan, you should focus on the following key factors:
Choosing the right OEM supplier is about more than unit price. A reliable partner should support your project from prototype to mass production while ensuring consistent product quality and long-term supply.
When evaluating an EC duct fan manufacturer, consider the following:
Absolutely. We encourage customers to evaluate our EC inline duct fans before placing volume orders.
With over 30 years of manufacturing experience, Longwell develops and manufactures ventilation fans for OEM and ODM customers worldwide. Every product undergoes strict quality inspections and performance testing to ensure reliable operation and consistent quality.
To help reduce development costs and shorten validation cycles, we offer fast sample production with a low minimum order quantity of 10–20 units. Whether you’re testing a new design, evaluating system compatibility or preparing for pilot production, our engineering team is ready to support your project.
The exact energy savings depend on your operating conditions, airflow requirements and control strategy. However, under the same duty point, an EC inline duct fan typically consumes significantly less electricity than a conventional AC fan thanks to its high-efficiency permanent magnet motor and integrated electronic speed control. Systems operating under variable loads often achieve even greater savings because the fan can automatically adjust its speed instead of running at full power continuously.
To estimate the potential savings for your project, try our free EC vs. AC Energy Savings & ROI Calculator. Simply enter your airflow, static pressure, operating hours and electricity cost to compare annual energy consumption, operating costs, CO₂ emissions and estimated payback between EC and AC fans.
EC inline duct fans require very little maintenance. To keep the fan operating efficiently, periodically remove dust from the housing and impeller, and check that all electrical connections remain secure. Keeping the air passages clean also helps maintain stable airflow and reduces unnecessary motor load.
The service life of an EC inline duct fan is influenced by several factors, including motor quality, installation, operating conditions and routine maintenance. Proper duct design, a stable power supply and regular cleaning all help extend the fan’s lifespan. Selecting a fan with the correct airflow and static pressure for your application is equally important, as an oversized or undersized fan may operate under unnecessary stress, leading to increased wear on the motor and internal components.
With routine maintenance and proper system design, an EC inline duct fan can deliver reliable, long-term performance in both residential and commercial ventilation systems.
