Best Inline Duct Fan 4 Inch Quiet in 2025
Updated on July 2025
#1
Recommended
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- Ventilates grow tents and circulates air effectively.
- Equipped with a 10-speed wired fan controller and UIS compatibility.
- Energy-efficient PWM-controlled EC motor operates quietly with minimal heat output.
- Mixed flow design enhances airflow in high-resistance environments.
- Duct size: 4”; dimensions: 6.9 x 11.9 x 7.4 in.; airflow: 205 CFM; noise level: 28 dBA; features dual ball bearings.
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- Ventilates grow tents and circulates air effectively.
- Equipped with a 10-speed wired fan controller and UIS compatibility.
- Energy-efficient PWM-controlled EC motor operates quietly with minimal heat output.
- Mixed flow design enhances airflow in high-resistance environments.
- Duct size: 4”; dimensions: 6.9 x 11.9 x 7.4 in.; airflow: 205 CFM; noise level: 28 dBA; features dual ball bearings.
#2
Value for Money
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- Energy-efficient inline duct fan operates at 4500 RPM, generating an airflow of 130 CFM with a maximum power consumption of 6W.
- Designed for quiet ventilation in various spaces such as grow rooms, bathrooms, kitchens, workshops, basements, and attics to enhance HVAC airflow.
- Constructed from high-quality plastic for durability; allows for quick removal and simple maintenance.
- Includes a variable speed controller to adjust airflow and noise levels according to preference.
- Duct size: 4 inches; dimensions: 7.28 x 3.82 x 3.82 inches; voltage: 100-240V; air pressure: 165 Pa; noise level: 26 dBA.
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- Energy-efficient inline duct fan operates at 4500 RPM, generating an airflow of 130 CFM with a maximum power consumption of 6W.
- Designed for quiet ventilation in various spaces such as grow rooms, bathrooms, kitchens, workshops, basements, and attics to enhance HVAC airflow.
- Constructed from high-quality plastic for durability; allows for quick removal and simple maintenance.
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#3
30% Off
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- Fan speed of 2500 RPM generates airflow of 195 CFM for effective ventilation in grow tents and rooms
- Operates at a low noise level of 30 dB, minimizing disruption during use
- ETL listed motor with automatic reset to prevent overheating and flame-retardant electrical components for safety
- Easy assembly with locking tabs on flanges and a 5.9-foot cord; components can be detached for cleaning
- Suitable for enhancing airflow, reducing humidity, and controlling odors in grow rooms, basements, and kitchens
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- Fan speed of 2500 RPM generates airflow of 195 CFM for effective ventilation in grow tents and rooms
- Operates at a low noise level of 30 dB, minimizing disruption during use
- ETL listed motor with automatic reset to prevent overheating and flame-retardant electrical components for safety
- Easy assembly with locking tabs on flanges and a 5.9-foot cord; components can be detached for cleaning
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#4
8% Off
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- Powerful 2200 RPM motor operates quietly under 30 dB, enhancing indoor air quality without disruption.
- Versatile design serves as both an intake and exhaust fan, promoting effective ventilation and air circulation.
- Durable hard plastic construction with a user-friendly switch metal ring for straightforward duct installation.
- Suitable for various settings including residential and commercial spaces, grow tents, HVAC systems, and bathroom ventilation.
- One-year warranty provided with responsive customer support available 24/7.
- Note that increased wattage leads to stronger airflow and higher noise levels.
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- Powerful 2200 RPM motor operates quietly under 30 dB, enhancing indoor air quality without disruption.
- Versatile design serves as both an intake and exhaust fan, promoting effective ventilation and air circulation.
- Durable hard plastic construction with a user-friendly switch metal ring for straightforward duct installation.
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#5
10% Off
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- Centralize management of your gardening devices using the GrowHub E42A platform for efficient growth environment control
- Energy-efficient, low-noise fan operates at 39 dB, with mixed-flow design for extended air distribution
- Integrated temperature and humidity monitoring with a probe for real-time environmental data and VPD tracking via the app
- Automate your growth stages by programming light settings, fan speed, and airflow for optimal plant conditions
- WiFi-enabled controller allows remote equipment management and enhances functionality through the app with Grow Recipes and advanced features
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- Centralize management of your gardening devices using the GrowHub E42A platform for efficient growth environment control
- Energy-efficient, low-noise fan operates at 39 dB, with mixed-flow design for extended air distribution
- Integrated temperature and humidity monitoring with a probe for real-time environmental data and VPD tracking via the app
- Automate your growth stages by programming light settings, fan speed, and airflow for optimal plant conditions
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#6
41% Off
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- Quietly moves air with a fan speed of 2600 RPM delivering 230 CFM for effective ventilation
- Operates at only 36.4 dB, minimizing noise for a discreet environment
- Features removable intake and exhaust ends for effortless installation and maintenance with a 5.9-foot cable
- Lightweight and compact design optimizes space in any grow room, ensuring high airflow and quiet operation
- Versatile use in grow tents, greenhouses, and various indoor spaces for improved air quality and balanced humidity
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- Quietly moves air with a fan speed of 2600 RPM delivering 230 CFM for effective ventilation
- Operates at only 36.4 dB, minimizing noise for a discreet environment
- Features removable intake and exhaust ends for effortless installation and maintenance with a 5.9-foot cable
- Lightweight and compact design optimizes space in any grow room, ensuring high airflow and quiet operation
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#7
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- Designed for indoor gardening, vertical farms, heating and cooling transfer, and air filtration applications.
- Includes a wired 10-speed fan controller; compatible with intelligent App controllers for advanced remote operation.
- Delivers an airflow of 214 CFM for effective ventilation; features a PWM-controlled EC motor for quiet and energy-efficient performance.
- Package contains a 4" inline duct fan, AC power plug, variable speed controller, and installation hardware with a long power cord for convenient setup.
- Specifications: 4" (100 mm) duct diameter; 30 W power consumption; input voltage of AC 110-240 V; maximum speed of 3000 RPM; noise level of 27 dBA; dual ball bearings for durability.
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- Designed for indoor gardening, vertical farms, heating and cooling transfer, and air filtration applications.
- Includes a wired 10-speed fan controller; compatible with intelligent App controllers for advanced remote operation.
- Delivers an airflow of 214 CFM for effective ventilation; features a PWM-controlled EC motor for quiet and energy-efficient performance.
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#8
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- Quiet operation with low noise levels (<30 dB) and adjustable airflow via variable speed control.
- Energy-efficient fan combines axial and centrifugal designs, delivering a powerful airflow of 200 CFM at 2500 RPM for effective ventilation and odor removal.
- User-friendly installation with removable duct ends and universal mounting bracket for easy airflow direction adjustment.
- Ideal for maintaining optimal conditions in grow rooms and suitable for various ventilation applications including industrial and household use.
- Includes 1 pack of 4-inch inline duct fan with speed controller. Maximum ambient temperature rating of 104℉/40℃.
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- Quiet operation with low noise levels (<30 dB) and adjustable airflow via variable speed control.
- Energy-efficient fan combines axial and centrifugal designs, delivering a powerful airflow of 200 CFM at 2500 RPM for effective ventilation and odor removal.
- User-friendly installation with removable duct ends and universal mounting bracket for easy airflow direction adjustment.
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#9
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- Energy-efficient blower with 2300 RPM speed generating 190 CFM airflow, combining axial and centrifugal fan benefits.
- Low noise operation at under 30 dB, allowing for quiet airflow without disrupting work.
- Features a stepless speed controller for adjustable air flow to meet different ventilation needs.
- Compact and lightweight design for easy installation in limited spaces, including an installation bracket and removable duct ends.
- Applicable for various ventilation needs in industrial, household, and horticulture settings.
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- Energy-efficient blower with 2300 RPM speed generating 190 CFM airflow, combining axial and centrifugal fan benefits.
- Low noise operation at under 30 dB, allowing for quiet airflow without disrupting work.
- Features a stepless speed controller for adjustable air flow to meet different ventilation needs.
- Compact and lightweight design for easy installation in limited spaces, including an installation bracket and removable duct ends.
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#10
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- Strong airflow of up to 130 CFM for enhanced ventilation across various spaces like grow tents, greenhouses, and kitchens.
- Upgraded EC motor for efficient performance, minimizing energy use and extending the product's lifespan.
- Operates quietly at 26 dB(A), ensuring a non-disruptive atmosphere for daily activities.
- Durable construction featuring ABS plastic housing and PBT blades, designed to resist deformation.
- Safety features include a wide voltage range power adapter and stall protection to prevent hazards.
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- Strong airflow of up to 130 CFM for enhanced ventilation across various spaces like grow tents, greenhouses, and kitchens.
- Upgraded EC motor for efficient performance, minimizing energy use and extending the product's lifespan.
- Operates quietly at 26 dB(A), ensuring a non-disruptive atmosphere for daily activities.
- Durable construction featuring ABS plastic housing and PBT blades, designed to resist deformation.
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