The 6 in size is the usual fit for a 4x4 or 5x5 grow tent with a carbon filter, and for venting a large bathroom or a laundry room. Most of these are EC fans rated 350 to 470 CFM, and the rated power and noise vary more than the airflow does, so compare airflow per watt and the noise rating as well as price.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Full ranking 9
- VIVOSUN AeroZesh T6#1 of 9Full review
A 6 in EC fan that moves about as much air as the CLOUDLINE S6 on half the rated power, for less money. The rated noise is higher.
Amazon $89.99$89.996 in408 CFM11.7 CFM/W32 dBA - AC Infinity CLOUDLINE S6#2 of 9Full review
The usual pick for a 4x4 or 5x5 grow tent with a carbon filter: plenty of airflow, high static pressure and quiet running.
Amazon $99$996 in425 CFM6.1 CFM/W30 dBA - VIVOSUN R6 6 in Inline Fan#3 of 9Full review
A low-cost 6 in fan for bathroom, basement or tent exhaust when running cost and filter performance matter less than price.
Amazon $63.99$63.996 in390 CFM-34 dBA - Hon&Guan PRO 6 in Inline Fan#4 of 9Full review
A low-cost 6 in EC fan with strong rated airflow. Its power draw is not published, which keeps it below documented rivals.
Amazon $76.99$76.996 in405 CFM-32 dBA - Hon&Guan 6 in EC Inline Fan HI-150EC#5 of 9Full review
A high-output 6 in fan for long duct runs or a big filter where noise is not a concern.
Amazon $99.99$99.996 in469 CFM6.1 CFM/W55 dBA - VEVOR 6 in EC Inline Fan HF-150PE#6 of 9Full review
A cheap 6 in EC fan with a full-featured controller. Its power draw and full-speed noise are not published.
Amazon $69.90$69.906 in402 CFM-- - Spider Farmer 6 in Inline Fan#7 of 9Full review
A quiet 6 in EC fan for 4x4 tents, best for owners already using Spider Farmer’s GGS controller.
Amazon $115.99$115.996 in402 CFM6.5 CFM/W32 dBA - AC Infinity CLOUDLINE A6#8 of 9Full review
A cheaper 6 in CLOUDLINE with less airflow and a little more noise than the S6. A fine fit for a tent that does not need the full 425 CFM.
Amazon $89.99$89.996 in352 CFM5.4 CFM/W34 dBA - Fantech FG 6#9 of 9Full review
A code-approved metal fan for bathroom, kitchen or radon exhaust where a contractor wants a long-lived, listed unit.
Amazon $201$2016 in305 CFM4.4 CFM/W-
