AC Infinity CLOUDLINE S6
#2 in 6 inFull 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$99
The AC Infinity CLOUDLINE S6 rates 3.4 among 6 in inline duct fans; the AC Infinity CLOUDLINE A8 rates 2.7 among 8 in and up ones. The AC Infinity CLOUDLINE S6 costs $40 less ($99 vs $139).
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.
AC Infinity CLOUDLINE A8
#7 in 8 in and upFull review
An 8 in EC fan for large tents and small grow rooms, with high static pressure. It draws more power at full speed than rivals that move more air.
Amazon $139$139
Scores side by side
These two sit in different duct size classes (6 in and 8 in and up), and each is scored against the reference points for its own class, so a rating says how well each does among its own duct size peers. How we rank explains each factor.
| Factor weight | AC Infinity CLOUDLINE S6 | AC Infinity CLOUDLINE A8 |
|---|---|---|
| Overall rating | 3.4/5 | 2.7/5 |
| Value 25% | 55 $23.29 per 100 CFM ($99, 425 CFM) | 41 $19.20 per 100 CFM ($139, 724 CFM) |
| Efficiency 25% | 34 6.1 CFM per watt (425 CFM, 70 W) | 9 3.8 CFM per watt (724 CFM, 190 W) |
| Airflow 15% | 88 425 CFM through 6 in duct | 56 724 CFM through 8 in duct |
| Noise 15% | 86 30 dBA at full speed | 51 42 dBA at full speed |
| Controls 10% | 40 speed controller included | 40 speed controller included |
| Warranty 10% | 25 2-year warranty | 25 2-year warranty |
Specifications
| AC Infinity CLOUDLINE S6 | AC Infinity CLOUDLINE A8 | |
|---|---|---|
| Performance | ||
| Duct size | 6 in | 8 in |
| Rated airflow | 425 CFM | 724 CFM |
| Static pressure (not scored) | 503 Pa | 746 Pa |
| Power at full speed | 70 W | 190 W |
| Power figure | Max power draw | Max power draw |
| Average power (not scored) | 38 W | 72 W |
| Airflow per watt | 6.1 CFM/W | 3.8 CFM/W |
| Price per 100 CFM | $23.29 | $19.20 |
| Noise at full speed | 30 dBA | 42 dBA |
| Controls | ||
| Motor | EC | EC |
| Controller | 10-speed controller | 10-speed controller |
| Speeds | 10 | 10 |
| Temperature and humidity control | No | No |
| Phone app | No | No |
| Timer or cycle modes | No | No |
| Build | ||
| Housing | Plastic | Plastic |
| Ingress rating | IP44 | IP44 |
| Voltage | 100-240 V | 100-240 V |
| Warranty | 2 years | 2 years |