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10 Best Quiet Inline Fans 2026 in the United States
#1
Winner
AC Infinity CLOUDLINE PRO T12, Quiet 12” Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control - Ventilation Exhaust Fan for Heating Cooling, Grow Tents, Hydroponics
The AC Infinity CLOUDLINE PRO T12 is a powerful 12-inch inline fan designed especially for ventilation tasks like hydroponic grow rooms, cooling equipment closets, or general airflow needs in heating and cooling setups. It delivers a strong airflow of 1604 CFM, which is quite high and suitable for larger spaces or demanding ventilation needs. The noise level is rated at 62 dB, which is moderate—not the quietest fan available, but still reasonable considering its high airflow. This means it may be noticeable in very quiet environments but should be fine in most grow or utility spaces.
Rating
10.0
Chosen by1,481
Airflow (CFM)
Noise Level (dB)
Speed Control
Most important from
29181 reviews
#2
AC Infinity CLOUDLINE PRO S10, Quiet 10” Inline Duct Fan with Speed Controller - EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics
The AC Infinity CLOUDLINE PRO S10 is a strong choice if you need a quiet and powerful inline fan, especially for tasks like ventilating grow rooms, cooling AV closets, or controlling odors. It delivers a high airflow of 1201 CFM, which means it can move a large amount of air efficiently, making it suitable for medium to large spaces or setups that require strong ventilation. The noise level is relatively low at 48 decibels, so it won’t be too disruptive in a home or indoor environment. Its EC motor is designed to be energy-efficient and quiet while generating minimal heat, which helps reduce electricity use and keeps the fan running cooler for longer life.
Rating
9.4
Airflow (CFM)
Noise Level (dB)
Energy Efficiency
Most important from
29181 reviews
#3
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
8.8
Airflow (CFM)
Noise Level (dB)
Size and Duct Compatibility
Most important from
29181 reviews
Top 10 Best Quiet Inline Fans 2026 in the United States
#1
Winner
AC Infinity CLOUDLINE PRO T12, Quiet 12” 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 T12, Quiet 12” Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control - Ventilation Exhaust Fan for Heating Cooling, Grow Tents, Hydroponics
Airflow (CFM): 1604 Cubic Feet Per Minute
Noise Level (dB): 62 dB
Size and Duct Compatibility: 12-inch duct; 17.7"L x 12.2"W x 14"H
Speed Control: PWM EC motor; temp, humidity control
Build Quality and Durability: Metal with dual ball bearings
Chosen by 1481 this week
AC Infinity CLOUDLINE PRO S10, Quiet 10” Inline Duct Fan with Speed Controller - EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics
AC Infinity CLOUDLINE PRO S10, Quiet 10” Inline Duct Fan with Speed Controller - EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics
Airflow (CFM): 1201 Cubic Feet Per Minute
Noise Level (dB): 48 dB
Energy Efficiency: High Efficiency
Size and Duct Compatibility: 10-Inch, fits standard duct
Speed Control: 10 speed settings, wired
Build Quality and Durability: Dual ball bearings
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
AC Infinity CLOUDLINE PRO T8, Quiet 8” 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 T8, Quiet 8” Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control - Ventilation Exhaust Fan for Heating Cooling, Grow Tents, Hydroponics
Airflow (CFM): 807 Cubic Feet Per Minute
Noise Level (dB): 39 dB
Energy Efficiency: 10.34 CFM per Watt
Size and Duct Compatibility: 8-Inch size fits standard duct
Speed Control: Single-speed with programmed adjustments
Build Quality and Durability: Dual ball bearings for durability
Related Products
Up to 17% off
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
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 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
#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.