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10 Best Quiet Inline Fans 2025 in the United States
#1
Winner
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
The AC Infinity CLOUDLINE PRO S6 is a 6-inch inline duct fan designed for various ventilation needs, including grow tents, room heating/cooling, and odor exhaust. It boasts an impressive airflow rate of 402 CFM, making it highly effective in moving air through high resistance areas, thanks to its mixed flow design with stator blades and hydrodynamic wind circles. With a noise level of only 32 dB, it operates quietly, which is ideal for indoor use where minimal noise is desired.
Rating
9.9
Chosen by1,465
Airflow (CFM)
Noise Level (dB)
Size and Duct Compatibility
Most important from
5353 reviews
#2
AC Infinity CLOUDLINE A6, Quiet 6” Inline Duct Fan with Speed Controller, EC Motor - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics
The AC Infinity CLOUDLINE A6 is a solid choice if you're looking for a quiet inline fan, especially for applications like grow tents, hydroponics, or ventilation in small rooms. It delivers a strong airflow of 352 CFM, which is quite good for a 6-inch duct fan, helping move air efficiently. Noise-wise, it operates at 34 dB, which is relatively quiet and suitable when you want to minimize sound disturbance. Its mixed flow design paired with an EC motor makes it energy efficient, consuming just 35 watts, so it won’t spike your electricity bill.
Rating
9.8
Airflow (CFM)
Noise Level (dB)
Energy Efficiency
Most important from
689 reviews
#3
AC Infinity Air Filtration PRO Kit 8”, Inline Fan, Temperature Humidity VPD Controller with WiFi App Control, Carbon Filter, Ducting, Ventilation System for Grow Tents, Hydroponics, Indoor Gardening
The AC Infinity Air Filtration PRO Kit 8” is a comprehensive solution for those engaged in hydroponics, indoor gardening, or using grow tents. One of its standout features is the powerful airflow capability, providing 807 CFM, which ensures effective ventilation in larger grow spaces. The noise level is reasonably low at 42 dBA, making it suitable for maintaining a quiet environment without being disruptive.
Rating
9.6
Airflow (CFM)
Noise Level (dB)
Size and Duct Compatibility
Most important from
1431 reviews
Top 10 Best Quiet Inline Fans 2025 in the United States
#1
Winner
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
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
Airflow (CFM): 402
Noise Level (dB): 32
Energy Efficiency: PWM-controlled EC motor, 38 watts
Size and Duct Compatibility: 6-inch duct, 7.9 x 12.6 x 8.4
Speed Control: 10-speed fan controller, UIS compatible
Build Quality and Durability: Dual ball bearings, water-resistant
Chosen by 1465 this week
AC Infinity CLOUDLINE A6, Quiet 6” Inline Duct Fan with Speed Controller, EC Motor - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics
AC Infinity CLOUDLINE A6, Quiet 6” Inline Duct Fan with Speed Controller, EC Motor - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics
Airflow (CFM): 352 Cubic Feet Per Minute
Noise Level (dB): 34 dB
Energy Efficiency: Highly Efficient
Size and Duct Compatibility: 6-Inch
Speed Control: Wired 10-Speed Controller
Build Quality and Durability: Dual ball bearings
AC Infinity Air Filtration PRO Kit 8”, Inline Fan, Temperature Humidity VPD Controller with WiFi App Control, Carbon Filter, Ducting, Ventilation System for Grow Tents, Hydroponics, Indoor Gardening
AC Infinity Air Filtration PRO Kit 8”, Inline Fan, Temperature Humidity VPD Controller with WiFi App Control, Carbon Filter, Ducting, Ventilation System for Grow Tents, Hydroponics, Indoor Gardening
Airflow (CFM): 807
Noise Level (dB): 42
Energy Efficiency: EC motor with PWM
Size and Duct Compatibility: 8-inch duct size
Speed Control: smart controller with WiFi
Build Quality and Durability: metal construction
AC Infinity CLOUDLINE PRO T4, Quiet 4” Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control - Ventilation Exhaust Fan for Heating Cooling, Grow Tents, Hydroponics
AC Infinity CLOUDLINE PRO T4, Quiet 4” Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control - Ventilation Exhaust Fan for Heating Cooling, Grow Tents, Hydroponics
Airflow (CFM): 205 CFM
Noise Level (dB): 28 dB
Energy Efficiency: Energy Efficient
Size and Duct Compatibility: 4-Inch
Speed Control: Smart, Remote, App Operable
Build Quality and Durability: Dual ball bearings
VIVOSUN Smart Air Filtration PRO G4 Kit 4", AeroZesh G4 Inline Duct Fan w/GrowHub E42A Temp. Humidity WiFi-Controller, Carbon Filter & Ducting, Cooling & Ventilation System for Grow Tent, Hydroponics
VIVOSUN Smart Air Filtration PRO G4 Kit 4", AeroZesh G4 Inline Duct Fan w/GrowHub E42A Temp. Humidity WiFi-Controller, Carbon Filter & Ducting, Cooling & Ventilation System for Grow Tent, Hydroponics
Airflow (CFM): 195 CFM
Noise Level (dB): 28 dB
Energy Efficiency: PWM controlled
Size and Duct Compatibility: 4-inch setups
Speed Control: GrowHub E42A controller
Build Quality and Durability: Durable aluminum, PET thermoplastic layers
Related Products
Up to 13% off
Panasonic WhisperCeiling Bathroom Exhaust Fan, 290 CFM, FV-30VQ3 B00084ZQA2 Panasonic Installation Kit for In-line Fans & ERVs, 6" Duct Single Inlet with Grille, FV-NLF06G
Panasonic WhisperCeiling Bathroom Exhaust Fan, 290 CFM, FV-30VQ3 B00084ZQA2 Panasonic Installation Kit for In-line Fans & ERVs, 6" Duct Single Inlet with Grille, FV-NLF06G
Airflow (CFM): 290
Noise Level (dB): 290
Energy Efficiency: Energy Star certified
Size and Duct Compatibility: 19.01"D x 15.98"W x 12.51"H
Speed Control: One power level
Build Quality and Durability: High-quality motors and blade design
#10
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Buying Guide for the Best Quiet Inline Fans
When choosing a quiet inline fan, it's important to consider several key specifications to ensure you get the best fit for your needs. Inline fans are used for ventilation purposes, often in HVAC systems, grow rooms, or other spaces where air circulation is crucial. The right fan will provide efficient airflow while maintaining a low noise level, which is essential for comfort and functionality. Here are the key specifications to consider and how to navigate them to make an informed decision.Airflow (CFM)Airflow, measured in cubic feet per minute (CFM), indicates the volume of air the fan can move. This is crucial because it determines how effectively the fan can ventilate a space. Higher CFM values mean more air movement. For small spaces, a lower CFM (100-200) might be sufficient, while larger areas may require a higher CFM (300-500 or more). To pick the right one, consider the size of the space you need to ventilate and the specific requirements of your application.
Noise Level (dB)Noise level, measured in decibels (dB), indicates how loud the fan will be during operation. This is important for maintaining a quiet environment, especially in residential or office settings. Lower dB values mean quieter operation. Fans with noise levels below 30 dB are considered very quiet, while those between 30-50 dB are moderately quiet. Choose a fan with a noise level that suits your tolerance and the environment where it will be used.
Energy EfficiencyEnergy efficiency refers to how much power the fan uses relative to the airflow it provides. This is important for reducing energy costs and environmental impact. Look for fans with energy-efficient motors, often indicated by certifications or energy ratings. More efficient fans will use less electricity to move the same amount of air. Consider your energy consumption preferences and the potential long-term savings when selecting a fan.
Size and Duct CompatibilityThe size of the fan and its compatibility with your ductwork are crucial for proper installation and performance. Inline fans come in various sizes, typically measured by the diameter of the duct they fit into (e.g., 4-inch, 6-inch, 8-inch). Ensure the fan you choose matches the size of your existing ductwork or the ductwork you plan to install. This will ensure optimal airflow and ease of installation.
Speed ControlSpeed control allows you to adjust the fan's airflow and noise level according to your needs. This is important for flexibility and comfort, as different situations may require different ventilation rates. Some fans come with built-in speed controllers, while others may require an external controller. Consider whether you need variable speed settings and how easy it is to adjust the fan's speed when making your choice.
Build Quality and DurabilityBuild quality and durability refer to the materials and construction of the fan. This is important for ensuring the fan's longevity and reliability. Look for fans made from high-quality materials like metal or durable plastic, and check for features like sealed bearings and corrosion-resistant coatings. A well-built fan will last longer and perform better over time. Consider the environment where the fan will be used and choose a model that can withstand those conditions.