10 Best Inline Duct Fans of 2025

Tested and Reviewed: Top 10 Inline Duct Fans deals with expert ratings from 8.1 to a perfect 10

October 2025 Edition

Editor's Choice

9.7

AC Infinity

AC Infinity CLOUDLINE PRO S6, Quiet 6” Inline Duct Fan with Speed Controller - EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

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Editor's bottom line:

“This inline duct fans is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Designed to ventilate grow tents, transfer heating/cooling to rooms, circulate air, exhaust odors, and cool AV racks.
Features a wired 10-speed fan controller; also compatible with all UIS controllers with intelligent programming.
PWM-controlled EC motor provides quiet and energy-efficient performance with minimal heat and noise.
Mixed flow design with stator blade and hydrodynamic wind circles enables airflow delivery in high resistance areas.
Duct Size: 6 | Dimensions: 7.9 x 12.6 x 8.4 in. | Airflow: 402 CFM | Noise: 32 dBA | Bearings: Dual Ball

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Picked by 299 people today

9.5

Voltset

Voltset 4 Inch Duct Fan, Inline Ventilation Exhaust Fan with Remote Control, 280 CFM Duct Intake Fan High Efficiency Air Fan for Duct Vent Bathroom, Kitchen, Grow Tent, Hydroponics, 3D Printer

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Main Highlights

High-Efficiency Inline Duct Fan: Equipped with a powerful 2200 RPM motor and operating at less than 30 dB, this fan quickly improves indoor air quality while maintaining a quiet environment
Speed Controller: Comes with a remote control to easily adjust fan speed (HIGH / LOW) and turn it ON/OFF for maximum convenience
Multi-Purpose Duct Fan: Functions as both an intake fan to bring in fresh air and an exhaust fan to remove indoor gases, ensuring comprehensive ventilation and air circulation
Easy to Install: Made from high-quality hard plastic, the fan features a sturdy structure for long-term stability. Includes a switch metal ring for easy duct installation
Widely Applicable: Ideal for both commercial and residential use, perfect for grow tents, planting rooms, HVAC systems, bathroom ventilation, and more
Customer Service: Voltset offers a one-year warranty and 24-hour professional customer service. Contact us anytime with your questions or concerns
Note: Higher wattage results in stronger wind force and increased noise levels

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9.5

VIVOSUN

VIVOSUN M4 4-Inch Inline Duct Fan, 195 CFM Ventilation Fan with EC Motor, Adjustable Speed, Energy-efficient Vent Blower for HVAC, Grow Tent, Hydroponics

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Main Highlights

Efficient and Quiet Ventilation: The PWM-controlled EC motor and mixed-flow design deliver powerful, quiet, and energy-efficient performance; Operating at 2800 RPM, this fan generates 195 CFM of airflow with low energy use and a noise level of just 28 dB
Adjustable Fan Speed: PWM control enables precise and easy speed adjustment to suit your needs; Simply turn the knob to select from three speed levels and set the fan to your desired speed effortlessly
Safety Protection: The ETL-listed EC motor includes an automatic reset function to prevent overheating and ensure safety; With locked-rotor protection, the fan cuts off power and resets automatically if the blades are blocked; The flame-retardant electrical junction box enhances fireproofing
Simple Hookup:Intake and exhaust flanges with locking tabs make vent hose connections quick and secure; The 5.9 ft cord provides flexible setup; The detachable housing, impeller, and blade simplify cleaning and maintenance
Versatile Applications: Efficiently exhausts stale air, supplies fresh air, and boosts airflow to balance humidity, regulate temperature, and improve air quality in grow tents, grow rooms, basements, or other spaces

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9.2

AC Infinity

AC Infinity RAXIAL S6, Inline Booster Duct Fan 6” with Speed Controller - Low Noise Inline HVAC Blower Can Fan for Basements, Bathrooms, Kitchens, Workshops

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Main Highlights

A duct fan designed to increase existing airflow in HVAC systems and ventilate home spaces like attics and workshops.
Features a variable fan speed controller, enabling you to optimize airflow and noise level for any application.
Unibody die-cast construction with no welded seams; reduces vibration while ensuring smoother airflow.
AC brushless motor with steel blades and lubricated bearings; not suitable in restricted airflow applications.
Duct size: 6 | Dimensions: 7.28 x 5.90 x 5.90 in. | Airflow: 265 CFM | Noise: 35 dBA | Bearings: Dual Ball

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9.0

Save 6%

Hon&Guan

Hon&Guan 6 Inch Inline Booster Duct Fan with Speed Controller - 345 CFM Airflow with 19.2W Ultra-Low Power and Low Noise

6% OffFree Shipping

Main Highlights

Energy-Efficient VentilationThis powerful inline duct fan speed of 3300 RPM can create the air flow of 345 CFM, Maximum power consumption is only 19.2W. Upgrade DC motor & low noise effectively circulating air, quickly move vast amount of air to exhaust odors.
Application ScenariosThe 6 inch booster duct fan designed to quietly ventilate grow rooms, bathrooms, kitchens, workshops, basements, attics and etc, in order to boost airflow in HVAC systems.
Easy to InstallHon&Guan air exhaust fan's blade and the body are made of high quality plastic, for quick removal and easy maintenance.
Adjustable Controller The 6-inch duct fan includes a variable speed controller, which can allows you to adjust the airflow and noise at will.
Excellent PerformanceDuct size: 6 | Dimensions: 7.28 x 5.79 x 5.79 in. | Voltage: 100-240V| Air Presssure: 142 Pa| Noise: 32 dBA

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8.8

AC Infinity

AC Infinity RAXIAL S4, Inline Booster Duct Fan 4” with Speed Controller - Low Noise Inline HVAC Blower Can Fan for Basements, Bathrooms, Kitchens, Workshops

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Main Highlights

A duct fan designed to increase existing airflow in HVAC systems and ventilate home spaces like attics and workshops.
Features a variable fan speed controller, enabling you to optimize airflow and noise level for any application.
Unibody die-cast construction with no welded seams; reduces vibration while ensuring smoother airflow.
AC shaded-pole induction motor utilizing balanced steel blades and permanently lubricated ball bearings.
Duct size: 4 | Dimensions: 7.28 x 3.95 x 3.95 in. | Airflow: 106 CFM | Noise: 28 dBA | Bearings: Dual Ball

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8.6

VIVOSUN

VIVOSUN 6 Inch Inline Duct Fan 240 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver

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Main Highlights

Durable: The fan has a strong motor which features a permanently lubricated bearing that operates quietly and requires no maintenance
Compact But Efficient: This duct fan is compact and lightweight enough to be installed in areas with little available space; With a diameter of 6 inches, speed of 2960 RPM and 240 CFM air flow
Low Noise: Superior balanced centrifugal impeller for long service life & quiet operation; A less than 37 dB noise level does not have any harm and will not disturb your work
Wide Applications: You can have it in bathrooms, kitchens, workshops, basements, attics and etc, in order to boost airflow in HVAC systems; Also, it can be used in grow rooms as intake fans or exhaust fan
Specifications: Voltage 110/120V, Power 37W; Max Operating Temp of Motor is 130 / 266; Max Ambient Temp is 60 / 140; Note: Please turn the fan off immediately if the blades get stuck by other objects
To maintain optimal performance of the exhaust fan, clean the fan after the first week of use with the carbon filter connected, and then clean regularly based on usage conditions

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8.3

Save 7%

Hon&Guan

Hon&Guan 4 Inch Inline Duct Fan with Upgrade Controller - 130 CFM Airflow with 6W Ultra-Low Power and Low Noise

7% OffFree Shipping

Main Highlights

Energy-Efficient VentilationThis powerful inline duct fan speed of 4500 RPM can create the air flow of 130 CFM, Maximum power consumption is only 6W. Upgrade DC motor & low noise effectively circulating air, quickly move vast amount of air to exhaust odors.
Upgrade Controller The 4 inch duct fan with upgraded AC controller for more stable voltage and longer life, you can adjust airflow and noise as needed.
Easy to InstallHon&Guan air exhaust fan's blade and the body are made of high quality plastic, for quick removal and easy maintenance.
Application ScenariosThe 4 inch duct booster fan designed to quietly ventilate grow rooms, bathrooms, kitchens, workshops, basements, attics and etc, in order to boost airflow in HVAC systems.
Excellent PerformanceDuct size: 4 | Dimensions: 7.28 x 3.82 x 3.82 in. | Voltage: 100-240V| Air Presssure: 165 Pa| Noise: 26 dBA

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8.1

Save 10%

VIVOSUN

VIVOSUN D4 4 Inch 195 CFM Inline Duct Ventilation Fan HVAC Vent Blower for Hydroponics Grow Tent

10% OffFree Shipping

Main Highlights

Powerful Airflow: This powerful blower with a fan speed of 2500 RPM can create an airflow of 195 CFM; It works efficiently in ventilating grow tents, transferring heat or cool rooms, circulating fresh air, as well as controlling proper humidity, temperature, and air quality for your grow area
Quiet Operation: Fitted with a flow deflector that concentrates the fan stream and cuts turbulent kinetic energy to reduce sound output to just 30 dB, which does not have any harm to your health and will not disturb your work
Safety Protection: The motor is ETL listed and features an automatic reset function to prevent overheating or other safety issues; The electrical junction box is made from flame-retardant components for fireproofing
Simple Hookup: The flanges on both the intake and exhaust ends are simple to assemble with the vent hose by locking tabs; A cord of 5.9-feet long for hassle-free setup; The housing, even the impeller and blades, are easy to detach for cleaning and maintenance
Wide Applications: It can improve airflow to reduce humidity, block odors, and lower temperatures in grow rooms, basements, or kitchens

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Best Value

8.1

Save 11%

VIVOSUN

VIVOSUN Inline Booster Duct Fan 4” 106 CFM with Speed Controller, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens, Attics, Grow Tents

11% OffFree Shipping

Main Highlights

Durable: The fan has a strong motor which features a permanently lubricated bearing that operates quietly and requires no maintenance; The quality steel housing makes it sturdy and built to last
Adjustable Speed: A variable speed controller on the power cord enables the fan to run at different speeds; With this speed switch, you can adjust it to the desired airflow level
Compact But Efficient: This duct fan is compact and lightweight enough to be installed in areas with little available space; With a diameter of 4 inches, speed of 2990 RPM and 106 CFM airflow
Low Noise: Superior balanced centrifugal impeller for long service life & quiet operation; A less than 28 dB noise level does not have any harm and will not disturb your life
Wide Applications: You can have it in bathrooms, kitchens, workshops, basements, attics and etc, in order to boost airflow in HVAC systems; Also, it can be used in grow rooms as intake fans or exhaust fan
To maintain optimal performance of the exhaust fan, clean the fan after the first week of use with the carbon filter connected, and then clean regularly based on usage conditions

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Our Best Overall Choice

Best Choice

9.7

AC Infinity

AC Infinity CLOUDLINE PRO S6, Quiet 6” Inline Duct Fan with Speed Controller - EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Designed to ventilate grow tents, transfer heating/cooling to rooms, circulate air, exhaust odors, and cool AV racks.
Features a wired 10-speed fan controller; also compatible with all UIS controllers with intelligent programming.
PWM-controlled EC motor provides quiet and energy-efficient performance with minimal heat and noise.
Mixed flow design with stator blade and hydrodynamic wind circles enables airflow delivery in high resistance areas.
Duct Size: 6 | Dimensions: 7.9 x 12.6 x 8.4 in. | Airflow: 402 CFM | Noise: 32 dBA | Bearings: Dual Ball

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