Quiet, high-static-pressure inline duct fans in 100 mm through 300 mm, stocked in Sydney by Quick Bloom Lights as the official Australian AC Infinity importer. Every Cloudline Pro uses a PWM-controlled EC motor and a mixed-flow impeller — the combination that holds airflow through carbon filters, bends and long duct runs where cheaper axial fans stall. Grow tent, subfloor, attic, garage or AV cupboard, the range covers it with two control options: a manual dial (S Series) or full climate automation (T Series).
100–300 mm
4″ through 12″ ducting
EC motor
quiet, and cheap to run at part speed
67,000 hrs
~7.5 years running 24/7
2-year warranty
official importer, AU plug fitted
S Series or T Series?
Here's the part most listings don't tell you plainly: the fan is identical. Same EC motor, same mixed-flow impeller, same airflow, same noise rating. The only difference is how you control it — so this is a decision about your setup, not about fan quality.
S Series — manual speed dial
A physical 10-speed dial. Set it and that's the airflow you get. No app, no programming, nothing to configure. The right choice for a subfloor, garage or utility run where you want reliable quiet extraction and nothing to think about, and it saves you the cost of a controller you won't use.
S4 100 mm · S6 150 mm · S8 200 mm
T Series — Controller 69 Pro included
Ships with the Controller 69 Pro: temperature, humidity and VPD triggers, dynamic speed that ramps with conditions rather than switching on and off, minimum-speed operation, timers, schedules and WiFi app control. The right choice for a grow tent, where you want the environment managed rather than just air moved.
T4 · T6 · T8 · T10 · T12
Which size for your space
| Duct size |
Suits |
Models |
| 100 mm (4″) |
Small tents up to 2x4, cupboards, single-room transfer |
S4 / T4 |
| 150 mm (6″) |
Tents up to 1.2 × 1.2 m (4x4), average subfloors, bathrooms |
S6 / T6 |
| 200 mm (8″) |
5x5 and 8x4 tents, grow rooms, large subfloors |
S8 / T8 |
| 250 mm (10″) |
Multi-tent runs, full rooms, large commercial subfloors |
T10 |
| 300 mm (12″) |
Commercial rooms and warehouse-scale extraction |
T12 |
The single most useful rule: buy one size up and run it slower. A larger fan at 40–50% is quieter, cooler, cheaper to run and lasts longer than a smaller one pinned near maximum doing the same work. If you're between sizes, size up.
Not sure? Use our exhaust fan size calculator to work it out from your room dimensions.
Filtration kits — fan, filter and ducting together
If you're building from scratch, the Air Filtration Kits bundle a T-Series fan with a matched carbon filter, ducting and clamps. Buying matched saves the most common and most expensive mistake we see: putting a larger fan into smaller ducting or an undersized filter, which raises static pressure, drops real-world airflow well below the rated figure, and makes the fan louder rather than quieter.
T4 Kit 100 mm · T6 Kit 150 mm · T8 Kit 200 mm
Getting it quieter still
These fans are quiet for what they move, but noise is usually the thing that decides whether a setup is liveable. Two accessories make a real difference, and both are cheap next to the fan:
-
Inline duct silencers fit into the run and absorb motor and air noise before it reaches the room — 100 mm, 150 mm, 200 mm.
-
Noise reduction clamps use a silicone coupler between fan and filter, cutting transmitted vibration without losing air pressure at the joint — 100 mm, 150 mm, 200 mm.
Stepping up: Controller AI+
Where the Controller 69 Pro runs the thresholds you set, Controller AI+ learns your space and adjusts output to stop over- and under-shooting your targets rather than reacting to a single reading.
- Dual-zone temperature, humidity and VPD control — two spaces from one unit
- Runs up to 8 UIS devices directly, expandable to 32 with splitter hubs
- Beginner mode hands programming to the AI; Advanced mode keeps full manual control
- Programming keeps running if WiFi drops out
FAQ
Is the S Series a lower-quality fan than the T Series?
No. Same EC motor, same impeller, same airflow and the same noise rating. The T Series simply includes the Controller 69 Pro; the S Series has a manual dial instead. If you don't need climate automation, the S Series is the same fan for less money.
Can I add a controller to an S Series fan later?
The S Series runs from its own dial and isn't built around the UIS controller port the way the T Series is. If there's any chance you'll want climate automation down the track, buy the T Series up front — retrofitting is not the cheap path. Ask us before you order if you're unsure which way to go.
Can the Controller 69 Pro be powered on its own?
No — it draws power through the fan, so it can't run standalone. This comes up when someone upgrades to a Controller AI+ and wants to redeploy the spare 69 Pro. The workaround most customers use is to plug a clip fan into it: that gives the controller a power source and gets you a second climate zone plus a backup controller.
Will these work for subfloor or bathroom ventilation?
Yes, and a good share of what we ship goes to exactly those jobs rather than to grow tents. They're IP44-rated and mount horizontally or vertically. For bathroom exhaust, the fan must form part of a properly designed ducted system, kept clear of direct water spray, and any fixed wiring must be done by a licensed electrician in line with AS/NZS 3000.
Why does an EC motor matter?
Two reasons. It can be dimmed proportionally, so the fan runs at the speed conditions actually need rather than full or nothing. And its power draw falls steeply as you dial it back, because fan power scales with roughly the cube of speed. A traditional AC-motor fan pulls close to its full rated wattage the moment it's switched on, whatever speed you set.
Is this genuine AC Infinity stock with Australian warranty?
Yes. Quick Bloom Lights is the official Australian importer and distributor for AC Infinity. Every unit ships with a fitted Australian three-pin plug, SAA certification and a 2-year warranty handled here in Sydney — no sending units overseas, no dealing with an offshore seller if something goes wrong.
