Duct fan is installed within ventilation ducts, rather than at the end of duct or on the wall. It operates by increasing gas pressure to overcome system resistance in the duct, enabling efficient air delivery and achieving ventilation, smoke exhaust, and cooling. It not only dissipates heat in the room but also keeps the air fresh and odor-free.
Duct fan can generate high static pressures, such as 500-800 Pa or higher, sufficient to move air through longer ducts and overcome resistance, delivering it to distant destinations. Therefore, it is particularly suitable for rooms with high ceilings.
Longwell offers a comprehensive range of duct fans, including centrifugal, axial, and mixed-flow duct fans. They come in various shapes: round, rectangular, and square. We are committed to meeting your ventilation needs across various settings—from industrial production facilities and commercial buildings to kitchens, bathrooms, and other public spaces.
Longwell AC axial fan runs directly on AC power and supports connections to battery or solar sources. It ensures high reliability through its precision components and ball bearings; available sizes range from 60 mm to 150 mm.
With compact structure, Longwell centrifugal duct fan is extremely suitable for the space-limited occasions, including commercial and industrial building HVAC systems. It can handle a variety of air volume and achieve high air transportation efficiency.
Ingeniously combining the higher pressure of centrifugal fan with the higher air volume of axial fan, the mixed flow duct fan efficiently delivers high volumes of air to the duct system. It utilizes high-quality ball bearings for low noise and consistent air flow.
The duct booster fan is specially designed for central air conditioning or heating systems, boosting the airflow from the main engine so that it can reach the target area more effectively. It solves the problem of insufficient air volume caused by long pipelines and high resistance.
The inline duct fan adopts high efficiency backward curved centrifugal impeller design, pipe diameter range of 150mm to 315mm, maximum air volume up to 1000m³/h. It is embedded and fixed in the ventilation duct, integrated with the pipeline.
The smoke extraction fan is a specialized use of duct fan in fire emergency fields. It has a built-in cooling system that can operate continuously for over 30 minutes at 280℃, with air flow rate reaching 25,200 m³/h, ensuring the safe evacuation of people in buildings.
As the power source of ventilation systems, duct blower fan is usually installed at the areas requiring pressurization, which solves the problem of insufficient power in terminal rooms of central systems. It is widely used in exhaust treatment, pneumatic transportation, etc.
The compact circular design makes the circular duct fan ideal for direct installation in ductwork. Its housing is made of galvanized steel or FRP, which is extremely durable. Additionally, its motor has an IP55 protection rating and features an overheat protection device.
The rectangular duct fan is designed to meet medium and high air volume ventilation needs in limited duct systems, and can be installed vertically or horizontally. It consists of a galvanized body and a radial flow fan, you can easily open it for maintenance.
Compared with the rectangular duct fan, the square duct fan has the same length and width, with higher structural stability and strength. Therefore, it is often used in industrial occasions where structural stability is required or installation space is limited.
The AC duct fan is directly driven by alternating current, and you can easily control the wind speed by adjusting the voltage. It is suitable for general budget and simple ventilation.
DC duct fan is driven by direct current and relies on external or built-in converter, with high efficiency and low noise. It’s your best bet if you consider the long-term cost of the fan.
The EC duct fan, controlled by PWM, features low noise, low power consumption, and long service life. It adapts to pipelines of various sizes ranging from 100 mm to 200 mm.
The impeller of direct drive duct fan is directly installed on the motor shaft, and the transmission efficiency is close to 100%. Its air volume and air pressure are above the medium level.
The duct fan silencer is installed between the fan and the duct, or in HVAC systems. Its 2-inch-thick insulation layer helps minimize heat transfer and suppress sound transmission, reducing noise pollution by more than 50%.
The working principle of the duct fan speed controller is to change the voltage to indirectly control the speed. You can manually adjust the fan directly, from 15% to 100%, without any humming or background noise.
It is essential to purify the air conveyed by the fan, so the filter is generally used with the fan. Its filtering medium is activated carbon, which can absorb more than 95% of impurities and odors in the air, improving indoor air quality.
The duct fan switch can control the opening and closing of the motor, adjust the wind speed and switch modes. It makes the precise speed regulation and remote intelligent control of the fan come true, greatly saving energy efficiency.
The fan coil unit is a compact device that integrates a fan, finned tube heat exchanger, air filter, and condensate pan. It uses fan to drive indoor air through the coil, and then achieves temperature control through heat exchange between the air and the coil.
Duct fan hose is used to connect ventilation ducts to ventilation systems or other equipment. It is flexible, stretchable and bendable, allowing installation in narrow or hard-to-reach locations and adapting to different installation angles.
Longwell has been specializing in producing fans for nearly 30 years, providing you with a wide range of duct fans to meet your various ventilation needs.
There are many kinds of drive modes for duct fans. The drive duct fan has transmission efficiency of nearly 100%. EC fan can maintain high efficiency operation under the load of 40% to 80%.
Longwell fans are reliable because they have passed a number of international certifications, including CE certification, RoHS certification, etc. Its protection level also reaches IP55.
Many duct fans adopt direct drive design, which eliminates intermediate transmission parts, reduces maintenance requirements, and greatly reduces the space occupied.
Using low-noise motors and backward-bent centrifugal impellers, Longwell duct fans can provide a quiet operating environment with noise below 25-30dB.
The overheating protection function of Longwell duct fan avoids the hidden dangers caused by excessive temperature. It has also been tested for explosion-proof safety.
After over two decades of continuous development, Longwell has significantly advanced its technological innovation, manufacturing, quality control, global service, and customization capabilities, providing customers around the world with the most efficient air flow solutions.
We have automated production line with an annual production capacity of over one million units, and ample inventory for fast shipping within 7 days. Most importantly, our products are of high quality and very affordable. If you require a customized product, our robust OEM/ODM capabilities can meet your specific requirements in terms of size, blade type, material, performance, and more.
Before starting the installation, you should be sure to disconnect the power supply to the work area for safety. Then, you’ll need a screwdriver to remove the old ventilation cover from the exhaust pipe, insert the inline duct fan into the exhaust pipe, and secure it.
After securing the duct fan, reconnect the power supply and activate the direct fan for testing. Adjust the fan speed while monitoring noise levels and maintaining consistent airflow to ensure proper operation. Note: Installation procedures may vary by region. For detailed guidance, Click Here to contact our certified technicians.
| Type | Model No. | Motor type | Blade Diameter (mm) | Material | Protection Class | Voltage(V) | Frequency(Hz) | Power(W) | Speed(RPM) | static Pressure(Pa) | Air Volume(m³/h) | Electric Current(A) | Noise(dBA) | Working Temperature(℃) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mixed Flow Duct Fan | LWDA-100(4")S-PWN-14 | AC | 100 | Plastic | IP44 | 230 | 50 | 36 | 2360 | 163 | 325 | 0.16 | 30 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-100(4")S-PWN-15 | AC | 100 | Plastic | IP44 | 230 | 50 | 25 | 1900 | 135 | 205 | 0.11 | 24 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-100(4")U-PWN-16 | AC | 100 | Plastic | IP44 | 115 | 60 | 34 | 2360 | 163 | 325 | 0.29 | 30 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-100(4")U-PWN-17 | AC | 100 | Plastic | IP44 | 115 | 60 | 34 | 1900 | 135 | 205 | 0.23 | 24 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-125(5")S-PWN-06 | AC | 125 | Plastic | IP44 | 230 | 50 | 39 | 2360 | 168 | 330 | 0.18 | 31 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-125(5")S-PWN-07 | AC | 125 | Plastic | IP44 | 230 | 50 | 28 | 1950 | 137 | 293 | 0.14 | 30 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-125(5")U-PWN-08 | AC | 125 | Plastic | IP44 | 115 | 60 | 37 | 2360 | 168 | 330 | 0.31 | 31 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-125(5")U-PWN-09 | AC | 125 | Plastic | IP44 | 115 | 60 | 29 | 1950 | 137 | 293 | 0.24 | 30 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-150(6")S-PWN-11 | AC | 150 | Plastic | IP44 | 230 | 50 | 59 | 2400 | 168 | 660 | 0.22 | 32 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-150(6")S-PWN-12 | AC | 150 | Plastic | IP44 | 230 | 50 | 41 | 2050 | 137 | 530 | 0.19 | 30 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-150(6")U-PWN-13 | AC | 150 | Plastic | IP44 | 115 | 60 | 59 | 2480 | 355 | 674 | 0.49 | 32 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-150(6")U-PWN-14 | AC | 150 | Plastic | IP44 | 115 | 60 | 44 | 2050 | 302 | 535 | 0.36 | 30 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-200(8")S-PWN-09 | AC | 200 | Plastic | IP44 | 230 | 50 | 130 | 2300 | 384 | 910 | 0.6 | 40 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-200(8")S-PWN-10 | AC | 200 | Plastic | IP44 | 230 | 50 | 113 | 1650 | 303 | 735 | 0.55 | 38 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-200(8")U-PWN-11 | AC | 200 | Plastic | IP44 | 115 | 60 | 182 | 2480 | 435 | 1250 | 1.59 | 41 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-200(8")U-PWN-12 | AC | 200 | Plastic | IP44 | 115 | 60 | 128 | 1950 | 302 | 750 | 1.06 | 38 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-250(8'')S-PWN-05 | AC | 250 | Plastic | IP44 | 230 | 50 | 175 | 2500 | 420 | 1600 | / | 50 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-315(12.6'')S-PWN-05 | AC | 315 | Plastic | IP44 | 230 | 50 | 320 | 2500 | 450 | 2500 | / | 55 | -30℃～+60℃ |
| Mixed Flow Duct Fan | LWDA-100 (4")U-PWN-01 | AC | 100 | Plastic | IP54 | 110-120 | 60 | 41 | 3350 | / | 410CFM | / | 52 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-100 (4")S-PWN-02 | AC | 100 | Plastic | IP54 | 220-240 | 50/60 | 41 | 2900 | / | 605CMH | / | 51 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-125 (5")U-PWN-01 | AC | 125 | Plastic | IP54 | 110-120 | 60 | 41 | 3350 | / | 410CFM | / | 52 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-125 (5")S-PWN-02 | AC | 125 | Plastic | IP54 | 220-240 | 50/60 | 41 | 2900 | / | 605CMH | / | 51 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-150 (6")U-MWN-01 | AC | 150 | Metal | IP54 | 110-120 | 60 | 55 | 3400 | / | 437CFM | / | 58 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-150 (6")S-MWN-02 | AC | 150 | Metal | IP54 | 220-240 | 50 | 41 | 2900 | / | 620CMH | / | 55 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-200 (8")U-MWN-01 | AC | 200 | Metal | IP54 | 110-120 | 60 | 179 | 3400 | / | 720CFM | / | 65 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-200 (8")S-MWN-02 | AC | 200 | Metal | IP54 | 220-240 | 50 | 143 | 2900 | / | 1150CMH | / | 59 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-250 (10")U-MWN-01 | AC | 250 | Metal | IP54 | 110-120 | 60 | 228 | 3000 | / | 1219CFM | / | 69 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-250 (10")S-MWN-02 | AC | 250 | Metal | IP54 | 220-240 | 50 | 162 | 2750 | / | 1900CMH | / | 68 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-300 (12")U-MWN-01 | AC | 300 | Metal | IP54 | 110-120 | 60 | 489 | 3450 | / | 1900CFM | / | 78 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-300 (12")S-MWN-02 | AC | 300 | Metal | IP54 | 220-240 | 50 | 320 | 2900 | / | 3150CMH | / | 72 | -25℃~60℃ |
| Mixed Flow Duct Fan | LWDA-350 (14")U-MWN-01 | AC | 350 | Metal | IP54 | 110-120 | 60 | 260 | 1720 | / | 2130CFM | / | 74 | -25℃~80℃ |
| Mixed Flow Duct Fan | LWDA-350 (14")S-MWN-02 | AC | 350 | Metal | IP54 | 220-240 | 50 | 903 | 2900 | / | 6450CMH | / | 79 | -25℃~80℃ |
| Mixed Flow Duct Fan | LWDA-400 (16")U-MWN-01 | AC | 400 | Metal | IP54 | 110-120 | 60 | 440 | 1780 | / | 2500CFM | / | 75 | -25℃~80℃ |
| Mixed Flow Duct Fan | LWDA-400 (16")S-MWN-02 | AC | 400 | Metal | IP54 | 220-240 | 50 | 1300 | 2940 | / | 7100CMH | / | 83 | -25℃~80℃ |
| Mixed Flow Duct Fan | LWDE-100 (4")U-PWN-01 | EC | 100 | Plastic | IP54 | 110-120 | 60 | 35 | 3350 | / | 410CFM | / | 52 | 60℃ |
| Mixed Flow Duct Fan | LWDE-100 (4")S-PWN-02 | EC | 100 | Plastic | IP54 | 220-240 | 50/60 | 35 | 3350 | / | 697CMH | / | 52 | 60℃ |
| Mixed Flow Duct Fan | LWDE-125 (5")U-PWN-01 | EC | 125 | Plastic | IP54 | 110-120 | 60 | 35 | 3350 | / | 410CFM | / | 52 | 60℃ |
| Mixed Flow Duct Fan | LWDE-125 (5")S-PWN-02 | EC | 125 | Plastic | IP54 | 220-240 | 50/60 | 35 | 3350 | / | 697CMH | / | 52 | 60℃ |
| Mixed Flow Duct Fan | LWDE-150 (6")U-MWN-01 | EC | 150 | Metal | IP54 | 110-120 | 60 | 35 | 3400 | / | 437CFM | / | 58 | 60℃ |
| Mixed Flow Duct Fan | LWDE-150 (6")S-MWN-02 | EC | 150 | Metal | IP54 | 220-240 | 50/60 | 35 | 3400 | / | 720CMH | / | 58 | 60℃ |
| Mixed Flow Duct Fan | LWDE-200 (8")U-MWN-01 | EC | 200 | Metal | IP54 | 110-120 | 60 | 140 | 3300 | / | 700CFM | / | 61 | 60℃ |
| Mixed Flow Duct Fan | LWDE-200 (8")S-MWN-02 | EC | 200 | Metal | IP54 | 220-240 | 50/60 | 140 | 3300 | / | 1310CMH | / | 61 | 60℃ |
| Mixed Flow Duct Fan | LWDE-250 (10")U-MWN-01 | EC | 250 | Metal | IP54 | 110-120 | 60 | 195 | 3000 | / | 1219CFM | / | 69 | 60℃ |
| Mixed Flow Duct Fan | LWDE-250 (10")S-MWN-02 | EC | 250 | Metal | IP54 | 220-240 | 50/60 | 195 | 3000 | / | 2075CMH | / | 69 | 60℃ |
| Mixed Flow Duct Fan | LWDE-300 (12")U-MWN-01 | EC | 300 | Metal | IP54 | 110-120 | 60 | 352 | 3200 | / | 1763CFM | / | 74 | 60℃ |
| Mixed Flow Duct Fan | LWDE-300 (12")S-MWN-02 | EC | 300 | Metal | IP54 | 220-240 | 50/60 | 352 | 3200 | / | 3500CMH | / | 74 | 60℃ |
| Mixed Flow Duct Fan | LWDE-350 (14")U-MWN-01 | EC | 350 | Metal | IP54 | 110-120 | 60 | 659 | 2800 | / | 3467CFM | / | 77 | 80℃ |
| Mixed Flow Duct Fan | LWDE-350 (14")S-MWN-02 | EC | 350 | Metal | IP54 | 220-240 | 50/60 | 659 | 2800 | / | 6200CMH | / | 77 | 80℃ |
| Mixed Flow Duct Fan | LWDE-400 (16")U-MWN-01 | EC | 400 | Metal | IP54 | 110-120 | 60 | 1200 | 2800 | / | 4032CFM | / | 81 | 80℃ |
| Mixed Flow Duct Fan | LWDE-400 (16")S-MWN-02 | EC | 400 | Metal | IP54 | 220-240 | 50/60 | 1200 | 2800 | / | 6850CMH | / | 81 | 80℃ |
| Ultra Silent Duct Fan | LWDA-100S-PWN-15 | AC | 100 | Plastic | IP44 | 230 | 50 | 40 | 2550 | 185 | 319 | / | 25 | -20℃～+50℃ |
| Ultra Silent Duct Fan | LWDA-125S-PWN-11 | AC | 125 | Plastic | IP44 | 230 | 50 | 40 | 2550 | 185 | 319 | / | 25 | -20℃～+50℃ |
| Ultra Silent Duct Fan | LWDA-150S-PWN-13 | AC | 150 | Plastic | IP44 | 230 | 50 | 80 | 2550 | 309 | 556 | / | 27 | -20℃～+50℃ |
| Ultra Silent Duct Fan | LWDA-200S-PWN-14 | AC | 200 | Plastic | IP44 | 230 | 50 | 130 | 2500 | 391 | 1236 | / | 29 | -20℃～+50℃ |
| Ultra Silent Duct Fan | LWDE-100 (4")U-MWN-03 | EC | 100 | Metal | IP54 | 110-120 | 60 | 35 | 3350 | 410CFM | 51 | 60℃ | ||
| Ultra Silent Duct Fan | LWDE-100 (4")S-MWN-04 | EC | 100 | Metal | IP54 | 220-240 | 50/60 | 35 | 3350 | / | 697CMH | EC | 51 | 60℃ |
| Ultra Silent Duct Fan | LWDE-125 (5")U-MWN-03 | EC | 125 | Metal | IP54 | 110-120 | 60 | 35 | 3350 | / | 410CFM | EC | 51 | 60℃ |
| Ultra Silent Duct Fan | LWDE-125 (5")S-MWN-04 | EC | 125 | Metal | IP54 | 220-240 | 50/60 | 35 | 3350 | / | 697CMH | EC | 51 | 60℃ |
| Ultra Silent Duct Fan | LWDE-150 (6")U-MWN-03 | EC | 150 | Metal | IP54 | 110-120 | 60 | 35 | 3400 | / | 437CFM | EC | 53 | 60℃ |
| Ultra Silent Duct Fan | LWDE-150 (6")S-MWN-04 | EC | 150 | Metal | IP54 | 220-240 | 50/60 | 35 | 3400 | / | 720CMH | EC | 53 | 60℃ |
| Ultra Silent Duct Fan | LWDE-200 (8")U-MWN-03 | EC | 200 | Metal | IP54 | 110-120 | 60 | 140 | 3300 | / | 700CFM | EC | 59 | 60℃ |
| Ultra Silent Duct Fan | LWDE-200 (8")S-MWN-04 | EC | 200 | Metal | IP54 | 220-240 | 50/60 | 140 | 3300 | / | 1310CMH | EC | 59 | 60℃ |
| Ultra Silent Duct Fan | LWDE-250 (10")U-MWN-03 | EC | 250 | Metal | IP54 | 110-120 | 60 | 195 | 3000 | / | 1219CFM | EC | 62 | 60℃ |
| Ultra Silent Duct Fan | LWDE-250 (10")S-MWN-04 | EC | 250 | Metal | IP54 | 220-240 | 50/60 | 195 | 3000 | / | 2075CMH | EC | 62 | 60℃ |
| Ultra Silent Duct Fan | LWDE-300 (12")U-MWN-03 | EC | 300 | Metal | IP54 | 110-120 | 60 | 352 | 3200 | / | 1763CFM | EC | 70 | 60℃ |
| Ultra Silent Duct Fan | LWDE-300 (12")S-MWN-04 | EC | 300 | Metal | IP54 | 220-240 | 50/60 | 352 | 3200 | / | 3500CMH | EC | 70 | 60℃ |
| Ultra Silent Duct Fan | LWDE-355 (14")U-MWN-03 | EC | 355 | Metal | IP54 | 110-120 | 60 | 659 | 2800 | / | 3467CFM | EC | 67 | 80℃ |
| Ultra Silent Duct Fan | LWDE-355 (14")S-MWN-04 | EC | 355 | Metal | IP54 | 220-240 | 50/60 | 659 | 2800 | / | 6200CMH | EC | 67 | 80℃ |
| Ultra Silent Duct Fan | LWDE-400 (16")U-MWN-03 | EC | 400 | Metal | IP54 | 110-120 | 60 | 1200 | 2800 | / | 4032CFM | EC | 70 | 80℃ |
| Ultra Silent Duct Fan | LWDE-400 (16")S-MWN-04 | EC | 400 | Metal | IP54 | 220-240 | 50/60 | 1200 | 2800 | / | 6850CMH | EC | 70 | 80℃ |
| Ultra Silent Duct Fan | LWDA-100 (4")U-MWN-03 | AC | Metal | IP54 | 100 | 110-120 | 60 | 41 | 3350 | / | 410CFM | / | 51 | 60℃ |
| Ultra Silent Duct Fan | LWDA-100 (4")S-MWN-04 | AC | Metal | IP54 | 100 | 220-240 | 50/60 | 41 | 2900 | / | 605CMH | / | 49 | 60℃ |
| Ultra Silent Duct Fan | LWDA-125 (5")U-MWN-03 | AC | Metal | IP54 | 125 | 110-120 | 60 | 41 | 3350 | / | 410CFM | / | 51 | 60℃ |
| Ultra Silent Duct Fan | LWDA-125 (5")S-MWN-04 | AC | Metal | IP54 | 125 | 220-240 | 50/60 | 41 | 2900 | / | 605CMH | / | 49 | 60℃ |
| Ultra Silent Duct Fan | LWDA-150 (6")U-MWN-03 | AC | Metal | IP54 | 150 | 110-120 | 60 | 55 | 3400 | / | 437CFM | / | 53 | 60℃ |
| Ultra Silent Duct Fan | LWDA-150 (6")S-MWN-04 | AC | Metal | IP54 | 150 | 220-240 | 50 | 41 | 2900 | / | 620CMH | / | 50 | 60℃ |
| Ultra Silent Duct Fan | LWDA-200 (8")U-MWN-03 | AC | Metal | IP54 | 200 | 110-120 | 60 | 179 | 3400 | / | 720CFM | / | 61 | 60℃ |
| Ultra Silent Duct Fan | LWDA-200 (8")S-MWN-04 | AC | Metal | IP54 | 200 | 220-240 | 50 | 143 | 2900 | / | 1150CMH | / | 57 | 60℃ |
| Ultra Silent Duct Fan | LWDA-250 (10")U-MWN-03 | AC | Metal | IP54 | 250 | 110-120 | 60 | 228 | 3000 | / | 1219CFM | / | 62 | 60℃ |
| Ultra Silent Duct Fan | LWDA-250 (10")S-MWN-04 | AC | Metal | IP54 | 250 | 220-240 | 50 | 162 | 2750 | / | 1900CMH | / | 60 | 60℃ |
| Ultra Silent Duct Fan | LWDA-300 (12")U-MWN-03 | AC | Metal | IP54 | 300 | 110-120 | 60 | 489 | 3450 | / | 1900CFM | / | 71 | 60℃ |
| Ultra Silent Duct Fan | LWDA-300 (12")S-MWN-04 | AC | Metal | IP54 | 300 | 220-240 | 50 | 320 | 2900 | / | 3150CMH | / | 65 | 60℃ |
| Ultra Silent Duct Fan | LWDA-355 (14")U-MWN-03 | AC | Metal | IP54 | 355 | 110-120 | 60 | 260 | 1720 | / | 2130CFM | / | 63 | 80℃ |
| Ultra Silent Duct Fan | LWDA-355 (14")S-MWN-04 | AC | Metal | IP54 | 355 | 220-240 | 50 | 903 | 2900 | / | 6450CMH | / | 68 | 80℃ |
| Ultra Silent Duct Fan | LWDA-400 (16")U-MWN-03 | AC | Metal | IP54 | 400 | 110-120 | 60 | 440 | 1780 | / | 2500CFM | / | 66 | 80℃ |
| Ultra Silent Duct Fan | LWDA-400 (16")S-MWN-04 | AC | Metal | IP54 | 400 | 220-240 | 50 | 1300 | 2940 | / | 7100CMH | / | 71 | 80℃ |
| Metal Duct Fan | LWDA-100S-MBN-14 | AC | 100 | Plastic | IP32 | 230 | 50 | 60 | 2450 | 326 | 242 | / | 59 | -25℃～+60℃ |
| Metal Duct Fan | LWDA-125S-MBN-10 | AC | 125 | Plastic | IP32 | 230 | 50 | 52 | 2350 | 326 | 294 | / | 60 | -25℃～+60℃ |
| Metal Duct Fan | LWDA-150S-MBN-12 | AC | 150 | Plastic | IP32 | 230 | 50 | 72 | 2160 | 368 | 457 | / | 61 | -25℃～+60℃ |
| Metal Duct Fan | LWDA-160S-MBN-04 | AC | 160 | Plastic | IP32 | 230 | 50 | 72 | 2200 | 336 | 494 | / | 63 | -25℃～+60℃ |
| Metal Duct Fan | LWDA-200S-MBN-13 | AC | 200 | Plastic | IP32 | 230 | 50 | 176 | 2540 | 515 | 987 | / | 70 | -25℃～+60℃ |
| Metal Duct Fan | LWDA-250S-MBN-10 | AC | 250 | Plastic | IP32 | 230 | 50 | 165 | 2615 | 515 | 1034 | / | 71 | -25℃～+60℃ |
| Metal Duct Fan | LWDA-315S-MBN-02 | AC | 315 | Metal | IP32 | 230 | 50 | 220 | 2520 | 593 | 1680 | / | 80 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-100L-MBN-11 | DC | 100 | Plastic | IP44-55 | 12 | / | 30 | 3000 | 365 | 241 | 2.65 | 62 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-100M-MBN-12 | DC | 100 | Plastic | IP44-55 | 24 | / | 30 | 3000 | 365 | 241 | 1.32 | 62 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-100H-MBN-13 | DC | 100 | Plastic | IP44-55 | 48 | / | 30 | 3000 | 365 | 241 | 0.67 | 62 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-125L-MBN-07 | DC | 125 | Plastic | IP44-55 | 12 | / | 32 | 3000 | 365 | 270 | 2.7 | 62 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-125M-MBN-08 | DC | 125 | Plastic | IP44-55 | 24 | / | 32 | 3000 | 365 | 270 | 1.35 | 62 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-125H-MBN-09 | DC | 125 | Plastic | IP44-55 | 48 | / | 32 | 3000 | 365 | 270 | 0.7 | 62 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-160M-MBN-02 | DC | 160 | Plastic | IP44 | 24 | / | 100 | 3050 | 505 | 662 | 4.2 | 72 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-160H-MBN-03 | DC | 160 | Plastic | IP44 | 48 | / | 100 | 3050 | 505 | 662 | 2.1 | 72 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-200L-MBN-10 | DC | 200 | Plastic | IP44 | 12 | / | 60 | 2600 | 505 | 662 | 5 | 67 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-200M-MBN-11 | DC | 200 | Plastic | IP44 | 24 | / | 60 | 2600 | 505 | 662 | 2.5 | 67 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-200H-MBN-12 | DC | 200 | Plastic | IP44 | 48 | / | 60 | 2600 | 505 | 662 | 1.2 | 67 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-250M-MBN-08 | DC | 250 | Plastic | IP44 | 24 | / | 130 | 2638 | 577 | 1236 | 5 | 72 | -25℃～+60℃ |
| Metal Duct Fan | LWDD-250H-MBN-09 | DC | 250 | Plastic | IP44 | 48 | / | 130 | 2638 | 577 | 1236 | 2.5 | 72 | -25℃～+60℃ |
| Metal Duct Fan | LWDE-100S-MBN-10 | EC | 100 | Plastic | IP54 | 230 | 50/60 | 85 | 3300 | 927 | 324 | 0.65 | 72 | -25℃～+60℃ |
| Metal Duct Fan | LWDE-125S-MBN-06 | EC | 125 | Plastic | IP54 | 230 | 50/60 | 85 | 3400 | 839 | 386 | 0.65 | 69 | -25℃～+60℃ |
| Metal Duct Fan | LWDE-150S-MBN-11 | EC | 150 | Plastic | IP54 | 230 | 50/60 | 85 | 2650 | 608 | 700 | 0.65 | 66 | -25℃～+60℃ |
| Metal Duct Fan | LWDE-160S-MBN-01 | EC | 160 | Plastic | IP54 | 230 | 50/60 | 85 | 2750 | 520 | 690 | 0.65 | 68 | -25℃～+60℃ |
| Metal Duct Fan | LWDE-200S-MBN-09 | EC | 200 | Plastic | IP54 | 230 | 50/60 | 170 | 2700 | 1030 | 1210 | 1.1 | 71 | -25℃～+60℃ |
| Metal Duct Fan | LWDE-250S-MBN-07 | EC | 250 | Plastic | IP54 | 230 | 50/60 | 170 | 2700 | 1030 | 1231 | 1.1 | 71 | -25℃～+60℃ |
| Metal Duct Fan | LWDE-315S-MBN-01 | EC | 315 | Metal | IP54 | 230 | 50/60 | 220 | 2700 | 793 | 1839 | 1.4 | 77 | -25℃～+60℃ |
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Duct fan is often used in drones, aircraft, helicopters, etc., to provide the thrust needed for vertical lifting. Its blades are located inside the pipeline and do not touch external objects, making it highly safe. It also makes much less noise than traditional open tail propellers.
HVAC systems are indispensable in public places like commercial and industrial buildings, as well as home spaces including bathrooms and kitchens. Duct fan is the core components of ventilation systems, responsible for key functions such as air supply, exhaust and pipeline pressurization.
Server cabinets, frequency converters, laser equipment, welding machinery, etc. all need fan auxiliary cooling. For high heat dissipation demand of desktop computers or workstations, small duct fan is also used to provide strong directional airflow and water cooling exhaust.
A very typical application of duct fan on transport vehicles is hovercraft, which is used as a propeller or lifting fan to provide powerful thrust. In addition, it also provides forced cooling airflow for traction ventilation and cooling systems such as EMU and subway trains.
Thanks to the high protection rating up to IP55 and excellent corrosion resistance, duct fan is the first choice for ventilation in oil industry, mine, tunnel and other space. Its air volume can reach up to 60,000 CFM, and can ensure the safety of construction environment.
The noise level of duct fans generally depends on the model, speed, and installation method. Low-noise models can be kept to 30-45 dB(A), while industrial-grade fans may reach 60-75 dB(A). To reduce noise, you can take the following measures:
Install vibration-damping brackets or soundproof enclosures for the fan, and avoid installing it in sensitive areas.
● Refer to the EU ErP energy efficiency standards and prioritize models with efficiencies greater than 80%.
● Match air volume and pressure to actual needs to avoid wasting energy by exceeding actual air volume requirements.
Choose a model that supports intelligent control to facilitate integration with building automation systems for on-demand ventilation.
● Moisture-proof protection: Choose a motor with an IP54 or higher protection rating to protect it from splashing water and dust during use. If you’re purchasing a ducted fan for a bathroom, it’s best to choose a stainless steel or coated housing.
● High-temperature-resistant design: If you’re using the ducted fan for smoke exhaust or in high-temperature environments, choose a model with a temperature resistance of >80°C, and the motor should be located outside the airflow.
● Clean the impeller and housing regularly to prevent oil or dust accumulation that could affect heat dissipation.
We recommend an inspection every 6-12 months, but if used in an industrial environment, it’s best to inspect every 3-6 months. Inspections of ducted fans include cleaning the impeller, checking bearing lubrication, and tightening terminal blocks.
● Listen for any unusual noises, such as banging or sharp grinding sounds, to indicate impeller deformation or bearing damage.
● Touch the fan housing. If the temperature exceeds 70°C, it may be overloaded or experiencing poor heat dissipation. Observe whether there is a significant decrease in air volume. This could be caused by a clogged filter or loose belt.
Explosion-proof fans must comply with ATEX/IECEx certification standards. Their key differences from ordinary fans are:
● Structural Design: The motor and casing are encapsulated in an explosion-proof package to prevent sparks from igniting explosive gases.
● Material Requirements: The impeller and casing are typically made of non-sparking materials like copper alloy or coated steel.
● Applicable Locations: Chemical, petroleum, and gas stations, among other environments where flammable and explosive gases or dust are present.
