Choosing the Right CloudRay Fan
Canopy airflow is the variable that separates strong harvests from soft, lanky plants. The
AC Infinity CloudRay clip-on fans give targeted air movement at the canopy without consuming floor space the way pedestal fans do. The right pick depends on tent size, ceiling height inside the tent, and whether you're running a Smart Controller for closed-loop climate.
CloudRay Model Comparison
| Model |
Head |
Control |
Best For |
| CloudRay A6 |
6" |
4-speed manual |
2x2, 3x3, 4x4 tents |
| CloudRay A9 |
9" |
4-speed manual |
4x4 and larger, taller plants |
| CloudRay S6 |
6" |
Smart Controller UIS |
Closed-loop climate setups |
How Many Fans Per Tent
For 2x2 and 3x3 tents, one CloudRay A6 clipped at canopy height covers the footprint. For a 4x4, run two A6 fans on opposite corners pointing diagonally across the canopy, or one A9 mounted centrally for wider sweep. At 5x5 and above, plan on 2-3 clip-on fans spaced evenly around the tent. The goal is gentle leaf flutter on every plant; if leaves stand completely still anywhere in the canopy, that zone needs another fan or repositioned airflow.
For full setup details, see
how to set up an indoor grow tent.
Related Guides
Pair with
AC Infinity grow tents for a matched ecosystem. Cross-brand options live in the broader
grow tent fans lineup.
Frequently Asked Questions
How many clip-on fans do I need for a 4x4?
Two A6 fans on opposite corners, angled diagonally across the canopy, or one A9 mounted on a central crossbar. The test for adequate airflow is leaf flutter across the entire canopy; any zone with completely still leaves needs another fan or repositioning.
A6 vs A9, what's the difference?
The A6 has a 6-inch fan head, the A9 has a 9-inch head with more total air movement per pass. The A6 is the right pick for 2x2 to 4x4 tents and shorter plants. The A9 is for 4x4 and larger or for tents with tall plants where you want the wider sweep zone to reach upper and lower canopy in one fan.
Does the CloudRay S6 work with the Smart Controller 69 Pro?
Yes, the S6 uses the same UIS connector as the 69 Pro and 69 Pro Plus. You can schedule on/off cycles or tie fan speed to temperature targets through the controller app. The A-series fans are manual-only and don't integrate with the controller ecosystem.
Where should I clip the fans in a tent?
At canopy height, clipped to the tent poles in opposite corners. Aim them diagonally across the canopy so air movement reaches the center where stagnant zones form. As plants grow, raise the fan height with them. Don't aim a clip-on fan directly at a single plant up close; the constant high airflow stresses the leaves.
Can the CloudRay oscillate up and down?
Yes, the head pivots through full vertical range and oscillates horizontally. The combination covers the canopy top and underside on a single pass. The pivoting head matters more than the oscillation range; for tall plants you'll mount the fan high and angle the head downward into the canopy.
How loud is the CloudRay at full speed?
Under 35 dB at low speed, around 45-50 dB at full speed. For comparison, a quiet room is 30 dB and normal conversation is 60 dB. Running at speeds 2-3 of 4 is the sweet spot for sound and airflow in a 4x4. The EC motor is significantly quieter than older AC-motor clip-on fans at equivalent airflow.
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