AC Infinity CLOUDLINE S4
#2 in 4 inFull review
A quiet, efficient 4 in fan for small grow tents, closets and AV cabinets. The S line adds a longer cord and more airflow than the cheaper A4.
Amazon $89.99$89.99
4 in226 CFM8.1 CFM/W26 dBA
3.9/5
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.
- 210 CFMAirflow
- 20 WPower
- 28 dBANoise
- ECMotor
Check price at Amazon$71.99
Price checked November 8, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Very high rated airflow per watt, so it costs little to run around the clock
- Controller has on/off cycle modes as well as ten speeds
Cons
- No static pressure rating published, so performance behind a filter is hard to compare
The VIVOSUN AeroZesh T family
Every VIVOSUN AeroZesh T model we rank, smallest first. Ratings compare each against its own duct size.
| Model | Airflow | Rating | Price |
|---|---|---|---|
| VIVOSUN AeroZesh T4 (this one) | 210 CFM | 3.9/5 | $71.99 |
| VIVOSUN AeroZesh T6 | 408 CFM | 4.0/5 | $89.99 |
| VIVOSUN AeroZesh T8 | 832 CFM | 3.8/5 | $119.99 |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its duct size. How we rank explains each one.
Specifications
| Model number | VSV-AZT4 |
|---|---|
| Performance | |
| Duct size | 4 in |
| Rated airflow | 210 CFM |
| Power at full speed | 20 W |
| Power figure | Labeled average |
| Airflow per watt | 10.5 CFM/W |
| Price per 100 CFM | $34.28 |
| Noise at full speed | 28 dBA |
| Top speed | 3,000 RPM |
| Controls | |
| Motor | EC |
| Controller | 10-speed controller with cycle modes |
| Speeds | 10 |
| Temperature and humidity control | No |
| Phone app | No |
| Timer or cycle modes | Yes |
| Build | |
| Housing | Plastic |
| Ingress rating | IP44 |
| Voltage | 110-240 V |
| Warranty | 2 years |
Alternatives in this duct size
AC Infinity CLOUDLINE T4
#3 in 4 inFull review
The S4 fan paired with a temperature and humidity controller and WiFi app. For a small grow tent that should run itself.
Amazon $119$119
4 in226 CFM8.1 CFM/W26 dBA
Spider Farmer 4 in Inline Fan
#4 in 4 inFull review
A quiet, efficient 4 in EC fan for small grow tents, priced below the CLOUDLINE S4.
Amazon $79.99$79.99
4 in205 CFM7.6 CFM/W26.8 dBA
Compare
Compare the VIVOSUN AeroZesh T4 with any other inline duct fan →
More from VIVOSUN: every VIVOSUN product ranked.