Top 10 Best Inline Fan for Grow Tent or Room Ventilation

If you are setting up a grow tent for your plants the inline fan is an important component, so check out this list of top 10 best inline duct fans, and other useful information.

In order to avoid problems such as mold, excess humidity and heat build-up inside your grow tent, it is recommended that the air in the tent is refreshed at least twenty times an hour.  It’s a bit tricky to get it right, but proper grow tent ventilation setup as well as air filtration is important for the health of your plants.

 best inline duct fans

Choose the Right Inline Duct Fan

To get the appropriate size of fan, measure the size of your grow tent and follow this basic calculation:

length x width x height x 20 = total volume of air per hour

Now you know the rating for the fan that you need to buy, this is the amount of volume of air per hour that it is capable of moving.  Some high-end fans even come with a variable control knob so you can adjust the fan’s speed to move more or less air.

Choose a Carbon Filter for your Inline Fan

For best results, a carbon filter gets attached to an exhaust fan. It filters the air as it passes through, emitting clean air outside of the tent. This is important for neutralizing odors.  See list below of various best selling carbon filters.

 

Top 10 Best Sellers Inline Fans on Amazon

These are today’s best selling inline duct fans for your grow tent ventilation. These items can all be purchased on Amazon, giving you a great selection at awesome prices. This list is updated daily based on actual sales data. On this list, you will see what others consider to be the best.

SaleBestseller No. 1
VIVOSUN 6 inch Inline Duct Booster Fan 240 CFM, Low Noise & Extra Long 5.5' Grounded Power Cord
59 Reviews
VIVOSUN 6 inch Inline Duct Booster Fan 240 CFM, Low Noise & Extra Long 5.5' Grounded Power Cord
  • Specs.: Diameter 6 inch, Speed 2960 RPM, Air Flow 240 CFM, Voltage 110/120V, Power 37W
  • Upgraded Advantages: Superior balanced blades for long service life & quiet operation; Motor...
  • Household Applications: Help to boost airflow in HVAC units to remove exhausts and odors from...
  • Grow Room Applications: Used as intake fan to bring fresh air into grow rooms; Also used as exhaust...
  • Note: Max Operating Temp of Motor is 130℃ / 266℉; Max Ambient Temp is 60℃ / 140℉.
SaleBestseller No. 2
VIVOSUN 6 Inch 440 CFM Duct Inline Fan with Variable Speed Controller
59 Reviews
VIVOSUN 6 Inch 440 CFM Duct Inline Fan with Variable Speed Controller
  • Power: 120W Current: 1.1A Noise Level: 50 dB; Fan speed: 2450 rpm 110V/60HZ; ETL certif...
  • Safe temperature range for operation: - 104℉ to 149℉; Safe air-humidity range: 5% to...
  • Presence of electrically-conductive air particles: the air in the area of operation shoul...
  • Suitable for green rooms / grow tent (hydroponics), hospital rooms, commercial cooling an...
  • What You Get: 6" inline fan, mounting bracket, user manual and friendly customer service.
Bestseller No. 3
iPower GLFANXINLINE6 High CFM Inline Ducting Fan,  Hydroponic Air Blower Heat Air Conditioning Vent...
726 Reviews
iPower GLFANXINLINE6 High CFM Inline Ducting Fan, Hydroponic Air Blower Heat Air Conditioning Vent...
  • 442 CFM; Noise Level: <55dB; Pre-wired 5-feet power cord; US 110/120V standard household plug
  • Durable ceramic-coated. Composite fan blades and center hub which reduces noise and vibration
  • Made with quality UL components for quiet operation. Permanently lubricated bearing that requires...
  • Solves air delivery problems without major system rework or expense. Removes heat from the system
  • Max Ambient Temp: 176℉ / 80℃. Warranty: 1 year
Bestseller No. 4
TerraBloom Inline Duct Fan 240 CFM, 6 Inch, Inline Booster Fan For Exhaust and Intake Ventilation
250 Reviews
TerraBloom Inline Duct Fan 240 CFM, 6 Inch, Inline Booster Fan For Exhaust and Intake Ventilation
  • PACKAGE CONTENTS: 6 Inch Inline Duct Fan, Instructions Manual. 6 Inch Diameter x 7.25 Inch Length, 6...
  • HOUSEHOLD APPLICATIONS: This Versatile Inline Duct Fan Designed To Exhaust and Intake Air Through 6"...
  • GROW ROOM APPLICATIONS: Use It As Intake Fan to Bring Fresh Air to Grow Rooms. Can Be Used as...
  • VENTILATION SPECS: Airflow 240 CFM, Power 37W, Voltage 120V/110V, Speed 2600 RPM. Compatible with...
  • WARRANTY: This Inline Duct Fan is Covered by 1 Year Warranty. Contact Us through Amazon For Service.
Bestseller No. 5
VIVOSUN 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller for Ventilation
7 Reviews
VIVOSUN 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller for Ventilation
  • Specs.: Speed 2550 RPM, Current 0.55A, Air Flow 390 CFM, Voltage 110/120V, Power 67W, Frequency...
  • Features: Durable plastic fan housing and blades for extremely low noise; Variable speed controller...
  • Features: Removable duct ends with locking tabs for quick removal and easy maintenance.
  • Suitable for industrial, household and horticulture ventilation applications for air clean and...
  • Max Ambient Temp is 110℉ / 45℃
Bestseller No. 6
Urban Farmer 6' Inch Inline Duct Booster Fan 240 CFM
81 Reviews
Urban Farmer 6" Inch Inline Duct Booster Fan 240 CFM
  • Package Includes: Urban Farmer 6" Inch Inline Duct Booster Fan 240 CFM / Dimensions: 6"x7"
  • Grow anywhere and grow better with the Urban Farmer Inline Duct Fan in your indoor grow space....
  • Inline duct fans help filter out air pollutants such as exhaust, fumes and odors. Breathe easier and...
  • Multi-use fan is great for indoor growing, grow tents, greenhouses, indoor gardens, or anywhere you...
  • Powerful and energy-efficient fans are quiet and only constructed with top quality steel to ensure...
Bestseller No. 7
VenTech VT DF-6 DF6 Duct Fan, 240 CFM, 6'
663 Reviews
VenTech VT DF-6 DF6 Duct Fan, 240 CFM, 6"
  • Air Flow: 240 CFM
  • Power: 37 W * Input Voltage: 120v/60Hz *
  • Dimension: 6" x 7" / Duct Size: 6"
  • Max Temp 140 Fahrenheit / Decibels: 68 (+/- 1.5)
  • Package Includes: 1 - 6" Duct Fan / 1 Instructional Pamphlet
Bestseller No. 8
Apollo Horticulture 6' Inch 390 CFM Inline Duct Fan with Built in Variable Speed Controller for...
50 Reviews
Apollo Horticulture 6" Inch 390 CFM Inline Duct Fan with Built in Variable Speed Controller for...
  • 1 - Apollo Horticulture 6" Inch Plastic Vent Inline Fan
  • Dimensions: 12.4" x 8.9" x 8.2" / Duct Size: 6" / Ducts ends are removable
  • Plastic inline fan with built-in adjustable speed control - keeps air cool and moving in your indoor...
  • Versatile - great for grow rooms, greenhouses, kitchens, commercial and home spaces, industrial...
  • Quiet and durable fan increases airflow to help move chemicals fumes, smells and odors out of your...
SaleBestseller No. 9
Active Air 400 CFM Inline Fan, 6-Inch
289 Reviews
Active Air 400 CFM Inline Fan, 6-Inch
  • Quiet operation
  • Durable ceramic-coated
  • Metal housing
  • UL-recognized components
  • Includes mounting brackets and 8 foot pre-wired 120V cord
SaleBestseller No. 10
Hydroplanet™ 6 Inch Hydroponic Inline Duct Fan 4inch 6inch 8inch Booster Fan (6inch)
5 Reviews
Hydroplanet™ 6 Inch Hydroponic Inline Duct Fan 4inch 6inch 8inch Booster Fan (6inch)
  • Used for Hydroponics and indoor growing
  • Removable mounting bracket
  • Quiet operation
  • Air Movement: 440 CFM

 

How to Set Up Your Grow Tent Inline Fan Exhaust

There are several methods to do this, and the example below is the simplest, where an extraction fan is used to remove old, odorous air from inside the tent, We recommend following manufacturer instructions for your specific setup and growing needs.

Here’s a useful instructional youtube video.

While you can put the extraction fan either inside or outside of the tent, in the example below, it is outside of the tent.

  1. Have an assistant hold the fan outside of the tent with the intake side pointing downward through a ventilation hole.
  2. Secure the carbon filter to the ducting using the duct clips.
  3. Using the hanging equipment, hang the carbon filter to one of the tent’s crossbars.
  4. Thread the ducting through the ventilation hole and connect to the fan.
  5. Connect the other length of ducting to the extraction side of the fan.
  6. Feed the opposite end of the ducting that is connected to the extraction side of the fan through an open window or a hole in the wall (ensuring that this has been vented out).

 See: Grow Tent Ultimate Guide

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