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 $89.995 VIVOSUN products ranked. Each one is scored and ranked against every brand in its duct size, so "#3 mid-size" means third of all mid-size duct fans here, not third among VIVOSUN's own.
VIVOSUN makes 4 current duct fans: 1 4 in, 2 6 in and 1 8 in and up. Prices run from $63.99 for the VIVOSUN R6 6 in Inline Fan to $119.99 for the VIVOSUN AeroZesh T8. Its best-rated model in each size: the VIVOSUN AeroZesh T4 (#1 of 7 4 in, rated 3.9), the VIVOSUN AeroZesh T6 (#1 of 9 6 in, rated 4.0) and the VIVOSUN AeroZesh T8 (#1 of 9 8 in and up, rated 3.8).
The VIVOSUN AeroLab pH Pen is VIVOSUN's only current ph meter here, ranked #4 of 13 pen testers and rated 3.7.
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.
VIVOSUN duct fans 4
- VIVOSUN AeroZesh T6#1 6 inFull 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 - VIVOSUN AeroZesh T4#1 4 inFull review
A very efficient 4 in EC fan with a 10-speed controller and on/off cycle modes, at a lower price than the CLOUDLINE S4.
Amazon $71.99$71.994 in210 CFM10.5 CFM/W28 dBA - VIVOSUN AeroZesh T8#1 8 in and upFull review
A strong 8 in EC fan for large tents at a mid-range price, with excellent rated airflow per watt.
Amazon $119.99$119.998 in832 CFM11.1 CFM/W45 dBA - VIVOSUN R6 6 in Inline Fan#3 6 inFull 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
VIVOSUN ph meters 1
- VIVOSUN AeroLab pH Pen#4 pen testersFull review
A low-cost grower’s pen with a replaceable probe. Its maker publishes little beyond the accuracy claim.
Amazon $65.99$65.99±0.01 pH-None