Cloudray S9 Gen 2, AC Infinity, Grow Tent Clip Fan with Oscillation, 229 mm (9 Inch)

The Cloudray S9 Gen 2 is a 9-inch (22.9 cm) clip-on circulation fan — the big brother to the S6, and the one to reach for when you need to move air across a wider area. A brushless EC motor with carbon steel gears and dual-ball bearings drives 10 digital speeds, 10 dynamic wind modes and 10-level automatic oscillation, so airflow can be tuned from a gentle breeze for seedlings up to full circulation for mature plants. It's IP54 weatherproof-rated to keep running through humid conditions, and connects to AC Infinity's UIS™ platform for WiFi app control, climate triggers and automation.

How much airflow, and where to point it

A circulation fan isn't a per-plant purchase, and the number of plants isn't the right way to size it. What you're aiming for is simpler: everything in the space should be moving slightly, all the time. Leaves should have a gentle, constant flutter — not being whipped around, and not standing dead still. Still air is where problems start; violent air causes its own.

Height matters as much as coverage. Air moving across the top of the canopy does nothing for what's underneath it, and the lower growth and the base are exactly where stagnant, humid air settles. The setup that works best in most spaces is two fans at different heights: one above or across the canopy, and a second lower down aimed through the stems and the base, so air is moving right through the plant rather than just over it.

That's a more useful rule than a fan-per-plant count. Set them to a speed where the whole space has movement, check the corners and the lower growth, and adjust from there.

Tailored, custom airflow

10 speed levels, 10 dynamic wind modes and 10 oscillation settings combine for precise control over circulation at every stage of growth — from ultra-gentle airflow for germination and seedlings up to full circulation for mature plants. In practice: run it low and steady for young plants so stems strengthen without stressing them, then step up speed and oscillation as they fill out and you want the whole canopy moving.

The 9-inch impeller is what separates the S9 from the smaller Cloudrays. It throws a broader, softer column of air rather than a narrow directed stream, which is what you want when you're trying to keep a whole canopy in motion instead of hitting one corner hard. That makes it the natural choice for the upper position in a two-fan setup. The 90° rotation range with 55° tilt lets it work around lights and ducting while still covering the space.

Redesigned motor & mount

The Gen 2 EC motor is larger and re-engineered to extend oscillation lifespan — the failure point that kills most clip fans long before the blades give out. Brushless design, carbon steel gears and dual-ball bearings, which AC Infinity rate at 67,000 hours of continuous operation, mean this is built for running around the clock rather than being a seasonal item. It draws just 11 W doing it, which is the same as the 6-inch S6 despite moving about 25% more air.

The clamp is a compact metal build with a vice-grip-style mechanism for a secure hold on tent poles — it won't slowly droop out of position over a cycle the way lighter clip fans can — and the fan mounts horizontally or vertically.

Full specifications

FAQ

How many fans do I need?

Judge it by movement rather than by a count. Everything in the space should be gently moving; if anything is standing still, you need more airflow or better placement. In practice most spaces want two fans at different heights — one across the canopy and one lower through the stems and base — rather than one fan working harder. The S9 is the natural choice for the upper position given its wider spread.

Where should I position it?

Not aimed straight at the plants at close range. Point it slightly above or across the canopy so the air rolls through the space rather than blasting one spot, and place a second fan lower so it moves air under and around the base. Oscillation helps here — it spreads the same airflow across a wider area instead of hammering one point.

S9 or S6 — which one do I want?

The S9 moves about 25% more air (405 CFM vs 325) and spreads it wider; the 6-inch S6 is more directed and hits a narrower area harder. Both draw the same 11 W and share the same motor, speeds and oscillation. The S9 suits the upper position and wider coverage; the S6 suits tighter spaces and the lower, more targeted position. Plenty of setups use one of each. The S9 does take up more room, so in a very small space the S6 is the better fit.

Do I need a controller to use it?

No. It plugs straight into a wall outlet and runs on its own controls with 10 speeds, 10 wind modes and 10 oscillation levels. Connecting it to a UIS-compatible AC Infinity controller adds app control, scheduling and climate-triggered automation, but isn't required.

Is it quiet enough to run overnight?

35 dBA at maximum speed — about the level of a quiet room — and quieter still a few speed levels down, which is where most people run it. Growers with a tent in a spare room or wardrobe generally leave it on overnight without issue. It's rated slightly louder than the S6 (31 dBA), which is what you'd expect from a larger impeller moving more air.

Can I leave it running 24/7?

Yes — and you generally should. Air should be moving continuously, not in bursts. The EC motor and dual-ball bearings are built for continuous duty, the IP54 rating handles humidity, and at 11 W it's one of the cheapest things in a space to leave on.

Will it fit my grow tent's poles?

Yes — the clamp uses a vice-grip-style mechanism designed for round tent poles and mounts horizontally or vertically, so it can be positioned wherever you need airflow, and holds firm even on poles that have worn or bent slightly over time. Bear in mind the fan body is 26.5 × 35.2 cm, so leave clearance for it to oscillate without fouling your lights or ducting.

Is this a genuine AC Infinity unit 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 and a two-year warranty handled here in Sydney — no shipping units overseas and no dealing with an offshore seller if something goes wrong.

I'm not a grower — is this any good for other uses?

Yes. It was designed for growers, but plenty of ours end up in workshops, garages, offices, server cupboards and caravans. The appeal is identical either way: 35 dBA at full speed and quieter at the settings most people use, 11 W so it costs almost nothing to leave running, automatic oscillation, and a clamp that fixes it to a shelf, bench or pole instead of taking up floor space. Being the largest of the three, it's the one to pick when you want to move air across a whole room rather than one desk.