Same fan, two very different controllers. We stock both — here is exactly what separates them.
The CLOUDLINE S6 ($99) and T6 ($149) use the exact same 6-inch, 402 CFM, 32 dBA mixed-flow fan. The real difference is the controller: the S6 ships with a wired 10-speed controller, while the T6 adds the CONTROLLER 69 PRO with temperature, humidity, and VPD automation plus Wi-Fi app control.
This is the most common question we get about AC Infinity ventilation, and the spec sheets make it easy to answer. Both fans share the same PWM-controlled EC motor, inline mixed-flow design with stator blade, dual ball bearings, IP-44 rating, and a 67,000-hour L10 life expectancy. Both are part of the UIS™ platform. You are purely choosing how much automation you want out of the box.
Both are live in our catalog — prices and specs below come straight from our product pages.
AC Infinity
$99
View CLOUDLINE S6 →
AC Infinity
$149
View CLOUDLINE T6 →Fan hardware is identical — the controller column is where your $50 goes.
| Spec | CLOUDLINE S6 | CLOUDLINE T6 |
|---|---|---|
| Price | $99 | $149 |
| Duct size | 6″ | 6″ |
| Airflow | 402 CFM | 402 CFM |
| Noise | 32 dBA | 32 dBA |
| Static pressure | 503 Pa | 503 Pa |
| Max power draw | 70 W | 70 W |
| Average power usage | 38 W | 38 W |
| Motor | PWM-controlled EC motor | PWM-controlled EC motor |
| Bearings | Dual ball | Dual ball |
| Ingress protection | IP-44 | IP-44 |
| L10 life expectancy | 67,000 hours | 67,000 hours |
| Voltage | 100-240V AC | 100-240V AC |
| Controller | Wired 10-speed speed controller | CONTROLLER 69 PRO with temp / humidity / VPD triggers |
| Climate automation | No — manual speed levels (UIS controller upgrade possible) | Yes — dynamic speed, timers, grow cycles, schedules, minimum speed |
| Wi-Fi app control | No | Yes — AC Infinity app with historical charts and CSV export |
| Sensor probe | Not included | 144 in. (12 ft) probe included |
| Fan dimensions | 7.9 x 12.6 x 8.4 in | 7.9 x 12.6 x 8.4 in |
| Weight | 7.25 lbs | 7.25 lbs |
All specifications above are taken directly from our product listings for these two models.
You want quiet, reliable exhaust at the lowest price and are happy setting the speed yourself. The wired 10-speed controller has backup memory, and because the S6 is compatible with all UIS controllers, you can add smart climate programming later without replacing the fan.
You want the fan to manage itself. The T6’s CONTROLLER 69 PRO reacts to temperature, humidity, and VPD with dynamic fan speeds, supports timers, grow cycles, schedules and a constant minimum speed, and connects to the AC Infinity Wi-Fi app for remote access, notifications, historical climate charts, and CSV export. For $50 more, most tent growers should take the T6.
Is the fan hardware different between the CLOUDLINE S6 and T6?
No. Both use the same 6-inch mixed-flow fan rated at 402 CFM and 32 dBA, with a PWM-controlled EC motor, dual ball bearings, 503 Pa static pressure, IP-44 rating, and a 67,000-hour L10 life expectancy. The difference is the included controller.
Can I add smart climate control to the S6 later?
Yes. The S6 is compatible with all UIS controllers with intelligent programming, so you can start with the wired 10-speed controller and upgrade to automated temperature, humidity, and VPD control later.
What does the T6 controller actually do?
The CONTROLLER 69 PRO sets dynamic fan speeds that respond to temperature, humidity, and VPD triggers, plus timer, cycle, and schedule modes and a constant minimum speed. Over Wi-Fi, the AC Infinity app adds remote access, advance programs, notifications, historical climate charts, and CSV data export.
Which one is quieter?
They are rated identically at 32 dBA. Both run a PWM-controlled EC motor that can operate smoothly at extremely low RPM without motor noise, so noise should not decide this comparison.