Best inline fan for grow tent
Growing weed in tents requires proper ventilation. We’ll show you how to find the best inline fan for grow tent ventilation. See the best options for quiet operation, powerful air movement, and long-term durability. We’ll also show affordable options for each fan size for growers on a budget.
6 inch inline fans
AC Infinity 6 inch inline fan
Winner: best 6 inch inline fan for grow tent use
The best 6 inch inline fan is the AC Infinity Cloudline S6 fan. It is quietest 6 inch inline fan for grow tent and grow room use. It’s powerful enough to change over the air in tents as large as 4×8 feet, but the fan controller lets you dial it down for use in 4×4 and 5×5 tents. Features include:
- 402 CFM of airflow
- Whisper quiet at 32 dBA
- Built-in 8-speed manual speed controller so you can fine-tune airflow
- Electronically Commutated (EC) motor which runs at 38 watts
For a less pricey option then the Cloudline S6, try the AC Infinity Cloudline LITE A6. At 344 DBA this inline fan is only slightly noisier than the S6. Both can be used to cool 6″ air-cooled light hoods. The A6 great value for the price.
AC Infinity also makes a 6″ inline fan with built-in humidity controller which is useful for both growing and drying weed plants.
For premium odor control pair it with a 6″ AC Infinity carbon filter.
TerraBloom 6″ Silenced Inline Duct Fan ECMF-150-S
Runner up: Best 6 inch inline fan
TerraBloom’s silenced ECMF-150-S inline duct fans have a 2″ thick layer of sound-insulation foam placed inside a steel body with vibration-reducing suspension springs inside. They’re more expensive than most other inline fans this size because of these materials.
- Airflow rating of 288 CFM and uses 36 watts at max speed
- Low sound: the unit runs from 31-50 dBA depending on fan speed setting
- Brushless EC Motor and dual jet-type blades
- HVI Certified and meets the ENERGY STAR Most Efficient 2021 Criteria
Works with Terrabloom’s wireless remote control (Model: ECMF-WR) or their intelligent thermostat speed controller with temperature programming (Model: SC-ECMF).
The biggest drawback to Terrabloom’s silenced inline duct fan is the price. If you don’t want to spend $200 on a 6 inch inline fan we know how you feel. They also make a less expensive, less powerful 6 inch inline fan. TerraBloom ECMF-150 6″ fan has a variable speed controller and delivers 288 CFM.
Vivosun 6 inch inline fan
Best 6″ inline fan for grow tent
The Vivosun 6″ inline fan is the a cheap yet powerful inline fan for grow tent use. It’s not the best in terms of sound levels or overall durability. But at nearly half the price of the AC Infinity, this fan is great if you’re a new grower on a budget.
The fan is made of plastic and uses 59 watts of power at full speed. It’s powerful but not very loud. We’ve used 6 inch and 4 inch Vivosun inline fans for years, including this plastic model. The absolute cheapest option, their 4″ metal drum inline fan, was used in a 4×4 grow tent for years before it stopped working.
- Low price makes it the best inline fan for growing weed on a budget
- 190 CFM of airflow
- 31 dB noise level
- Speed controller attached
Vivosun also makes a 6″ fan and filter kit which is a great value since it comes with both the inline fan and 18″ long carbon filter that eliminates the smell of stinky weed plants from your exhaust.
Best 4 inch inline fan
AC Infinity 4 inch inline fan
Winner: best 4 inch inline fan for grow tent use
The best 4 inch inline fan is the AC Infinity Cloudline S4. It is quietest 4 inch inline fan for grow tent usage, and you can further reduce fan noise by slowing speeds on the attached fan speed controller. This fan is powerful enough for a 4×4 or 5×5 tent, and is suitable for smaller tents such as 2×4 or 3×3. Features include:
- 205 CFM of airflow
- 28 dBA sound level
- Built-in speed controller
AC Infinity also makes a 4″ inline fan with built-in humidity controller which is useful for both growing and drying weed plants.
You can also buy this fan as part of a 4″ inline fan kit.
Vivosun 4 inch inline fan
Best cheap inline fan for grow tent
The Vivosun 4 inch inline fan may not be the best inline fan for grow tent use in terms of overall quality. But at nearly half the price of the AC Infinity, this fan is great if you’re a new grower on a budget.
The fan is made of plastic and uses 59 watts of power at full speed. It’s powerful but not very loud. We’ve used 6 inch and 4 inch Vivosun inline fans for years, including this plastic model and the their cheapest option, their 4″ metal drum inline fan.
- Low price makes it the best inline fan for growing weed on a budget
- 190 CFM of airflow
- 31 dB noise level
- Speed controller attached
Vivosun also makes a 4” fan and filter kit which is a great value since it comes with both the inline fan and 14″ long carbon filter that eliminates the smell of stinky weed plants from your exhaust.
Best 8 inch inline fan
The 8 inch inline fan size is meant for very large grow tents and grow rooms. Most home growers wouldn’t need this size.
AC Infinity 8 inch inline fan
Winner: best 8 inch inline fan for grow tent use
The best 8 inch inline fan is the AC Infinity 8 inch fan. Noticing a pattern here? AC Infinity fans are quieter yet more powerful than their competitors. Very highly reviewed on Amazon, and our experience with them has been the same.
- 807 CFM of air movement
- Noise level of 39 dBA
- Features an 8-speed manual fan controller
AC Infinity also makes a 8″ inline fan with built-in humidity controller which is useful for both growing and drying weed plants.
This fan pairs with the AC Infinity 8″ carbon filter.
Vivosun
Best low price 8 inch inline fan for grow tent
Vivosun makes some of the least expensive 8 inch inline fans out there.
They have two in the 8 inch size:
- The plastic Vivosun 8″ inline fan delivers 740 CFM of air movement
- The metal Vivosun 8″ inline fan offers CFM
Both are a good value for an inline fan under 100 dollars. They’re a bit louder and less efficient than the AC Infinity 8 inch inline fans. But if you are looking to grow weed in a tent with the lowest possible startup costs, Vivosun can help you equip your grow tent cheaply.
Summary: Best inline fan for grow tent use
The best inline fan for grow tent setups is the AC Infinity. It’s the clear winner in all sizes for quality, power, and low sound output: 4 inch, 6 inch, and 8 inch. They’re very powerful yet quiet. They come with fan contr
ollers and have models with humidity controllers.
If you’re on a budget, the best inline fan for grow tents is the Vivosun 4 inch, 6 inch, or 8 inch.
If you are using your inline fan to prevent grow tent heat issues, check out these resources:
- Grow tent ventilation setup
- How much ventilation is needed in grow tents?
- How to find the quietest inline fan
- What fans do I need for my grow tent?
- Grow tent fan reviews
- Find the best box fan for grow rooms