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Black AC Infinity inline duct fan with mounted metal bracket and digital environmental controller showing 93°F.

Black AC Infinity duct fan shown with airflow tubes, controller, and descriptive text on a wood-grain panel background.

Black AC Infinity speed controller with labels highlighting 8 PWM speeds, backup memory, and included mounting screws.

Cross-section of an inline duct fan showing the internal PWM motor, blades, and red to blue airflow graphic.

Black AC Infinity speed controller with circular dial, plug, and cable on a dark background.

Specifications graphic for Cloudline S4/T4 4-inch inline duct fan showing dimensions, airflow, and power cord lengths.

Technical diagram showing front, side, and back dimensions of a black inline fan speed controller with 8 speeds.

Flexible black grow room ducting with a silver interior, shown curved with two metal tightening clamps.

PRE ORDER: Cloudline T6 AC Infinity Fan with Controller 69 Pro

Name: PRE ORDER: Cloudline T6 AC Infinity Fan with Controller 69 Pro
Brand: AC Infinity
SKU: AI-CLT6
Price: 149.0 USD
Availability: InStock
Rating: 5.0 (25 reviews)

AC Infinity

Price:

$149.00

Contact us about commercial pricing

Quantity:

Free shipping $49+ on most items

Financing
available here

Discreet packaging

Have a question?
716-217-0353

Set the number once and stop touching the fan

The CLOUDLINE T6 uses the same 6 inch fan body as the S6, which AC Infinity rates at 425 CFM, 503 Pa of static pressure and 30 dBA. What the extra money buys is the CONTROLLER 69 PRO: four device ports, temperature, humidity and VPD triggers, ten speed levels and a minimum speed the fan never drops below. Every figure below comes from AC Infinity's own product page or the two manuals they host, and three numbers our old copy carried are gone because AC Infinity does not publish them.

Free shipping over $49

30-day returns on all orders

Serving growers since 2006

A speed dial vs a climate controller

Same airflow, different amount of attention

An inline fan on a speed dial	CLOUDLINE T6 with CONTROLLER 69 PRO
You pick a speed by hand and it holds that speed until you change it again.	Ten levels, 0 to 10, set by the controller. Level 0 is off.
A hot afternoon runs hot, because nothing in the room knows the temperature changed.	AUTO mode carries four triggers that lift the speed when the probe crosses the number you set.
Humidity is your problem to notice and your problem to fix.	VPD mode carries two triggers, worked out from ambient temperature, relative humidity and a leaf offset you enter.
Lights-off runs at the same speed as lights-on unless you get up and turn it down.	TIMER TO ON, TIMER TO OFF, CYCLE and SCHEDULE all run on the clock without you.
What the room did while you were at work is not recorded anywhere.	The app keeps historical charts and exports them as CSV.
A second device means a second controller and a second outlet.	Four UIS ports on the one controller, so three more devices can share it.

Gallery

The fan, the bracket and what is inside it

CLOUDLINE T6 inline duct fan on its mounting bracket beside the controller showing a temperature reading.

CLOUDLINE T6 fan shown with ducting attached at both flanges and the controller alongside it.

Cut away view of the inline fan showing the mixed flow impeller and the EC motor inside the housing.

Before you order

Six things AC Infinity publishes that are worth knowing first

4 portsOld page said 1

The controller runs four devices, not one

AC Infinity's spec table lists Maximum Devices Controlled as 4, and the CONTROLLER 69 PRO manual says it is built with four ports. Our old page said it supports one additional fan.

425 CFM503 Pa

Mixed flow, so a filter does not flatten it

The impeller is mixed flow and the motor is an EC type under PWM control, which is how AC Infinity gets 425 CFM out of it at 503 Pa of static pressure.

Minimum speed

A floor it never drops below

Set a minimum and the fan holds that level constantly, lifting only when a trigger fires. Air keeps moving between events instead of stopping dead.

12 ft probe

The probe reaches the canopy, not the fan

The sensor is a thermal alloy head on a 144 in lead, so it reads where the plants are rather than where the fan happens to be bolted.

67,000 h L10

Dual ball bearings, mounted either way

AC Infinity rates the bearings at a 67,000 hour L10 life and lists horizontal or vertical mounting. The motor cap unscrews and rotates without voiding the warranty.

5 step strip down

The motor box comes out to be cleaned

Loosen the metal rings, slide the motor box out of the flange bracket, then wipe the impeller, the wind circle and the stator blades at the far end.

Specifications

Published figures from AC Infinity's own product page and manual

Model and UPCAI-CLT6, UPC 854759004792

Duct size6 in, both flanges

Airflow425 CFM

Static pressure503 Pa

Noise30 dBA

Power70 W peak, 38 W average, 0.94 A at 100 to 240V AC

Fan dimensions7.87 x 12.60 x 8.35 in, mounting holes 3.15 x 2.36 in

BearingsDual ball, 67,000 hour L10 life

Three figures are missing on purpose. AC Infinity prints IP 44 in the T6 spec table and IP 54 in the manual that covers this fan, so we publish neither. Unit weight and housing material are not published anywhere we can point at. Full documents: the CLOUDLINE S and T series manual and the CONTROLLER 69 PRO manual, both hosted by AC Infinity.

How it works

Four steps, and step three is the one that causes service calls

1

Mount or hang it with the arrow pointing out

Slide the motor box off the flange bracket, mark and drill the four holes, use the included wall anchors if you are not going into a stud, then put the box back with the airflow arrow facing the direction you want the air to go.

2

Link the fan to the controller, then to the wall

The included UIS cord runs 10 feet from fan to controller, and the fan's own cord runs 8 feet to a standard NEMA 5-15 outlet. The controller takes its power from the fan.

3

Put the probe at canopy height, away from ballasts

Plug the probe into the controller's 3.5mm jack and route its cord clear of any HID ballast power leads. AC Infinity calls that out specifically because the interference shows up as bad readings.

4

Pick a mode and set a floor

Modes are OFF, ON, AUTO, VPD, TIMER TO ON, TIMER TO OFF, CYCLE and SCHEDULE. Calibration, transition, buffer and leaf offset all sit in the settings menu.

What you get

What ships, and what you may still need

What ships

CLOUDLINE T6 duct fan system, AC Infinity part AI-CLT6
CONTROLLER 69 PRO with a 3.5 x 1.4 in backlit display that switches between F and C
Sensor probe, thermal alloy head on a 144 in lead
UIS male to male cord, 10 ft, fan to controller
Two duct clamps and two hanging straps
Mounting set: wood screws, four wall anchors, controller plate bolts and hex nuts
Cable management: six wire mounts, one adhesive wire mount and four hook and loop ties
The fan's power cord is integrated, 96 in to a NEMA 5-15 plug. There is no separate power adapter, which our old page listed
No ducting and no carbon filter. Both are sold separately
Ships from our Buffalo, NY warehouse in discreet plain-box packaging

What to add

What you are trying to do	What to add
Same fan, no automation, lower price	Cloudline S6 with speed controller, $99.00
Scrub the exhaust before it leaves the room	AC Infinity Carbon Filter 6 Inch, $69.99
Run one fan into two or three spaces	3 Way Duct Splitter, 6 Inch, $37.99
Add a circulation fan or an LED bar later	Nothing. Three of the controller's four ports are still free

Deciding between the S6 and the T6: the fan is the same on both, at 425 CFM, 503 Pa and 30 dBA. The difference is the controller, so the question is whether you want to set a number and walk away or turn a dial yourself. If you already own a 4 inch or 8 inch CLOUDLINE and want to match it, call 716-217-0353 first, because those sizes are not in stock for us at the moment.

FAQ

What growers ask before buying an inline fan

How quiet is 30 dBA really?

30 dBA is roughly the level of a quiet library, and it is the figure AC Infinity publishes for this model. What they do not state is the speed level or the distance it was measured at, so treat it as a floor rather than a promise. At level 10 in a small hard-walled room you will hear it, and most of what you hear will be air through the ducting rather than the motor.

Is a 6 inch fan enough for my tent?

AC Infinity does not publish a tent size chart for this fan, so this part is our own rule from what we ship: 425 CFM handles a 4x4 or a 5x5 comfortably with a carbon filter in line, and a 2x4 only needs it running at the low end. A filter and a long duct run both cost you airflow, which is what the 503 Pa static pressure rating is there to absorb. If your run has more than two bends or climbs more than one floor, call us at 716-217-0353 before you order.

What else can I plug into the controller?

AC Infinity names the CLOUDLINE, CLOUDRAY and IONFRAME series as UIS devices that connect directly. Other grow lights and standard outlets connect through select adapters rather than plugging straight in, so check the adapter before you count on a device being controllable.

Can I use this in a garage, greenhouse or crawl space?

AC Infinity lists an operating range of 32 to 140F and 35 to 85% relative humidity, and the product carries CE, ETL, RoHS, SAA and IC marks. We do not print an ingress rating for it because AC Infinity publishes two different ones for this fan. Water submersion and the wrong voltage input are both listed as warranty exclusions, so a sheltered mount matters more than the rating would.

Does the app need WiFi, or will Bluetooth do?

Both work. Bluetooth is enough to program the controller while you are standing next to it. The 2.4 GHz WiFi connection is what gets you remote access from outside the room, plus alarms and notifications. Note that it is 2.4 GHz only, so a router running a 5 GHz band alone will not see it.

What does the warranty cover?

AC Infinity covers the product against manufacturing defects for two years from the date of purchase, and their remedy is a replacement unit or a full refund. Abuse and misuse are excluded, and they spell that out as physical damage, water submersion and incorrect installation such as the wrong voltage input. Normal wear like scratches and dings is not covered. Start a claim with us and we will run it.

What if it arrives damaged, or it is not right for my setup?

If you receive a defective or damaged unit, email us a photo at help@happyhydro.com and we'll take care of you. For change-of-mind returns, we accept returns within 30 days for most items in new, resalable condition. If you're not sure whether this product is right for your setup, call us first at 716-217-0353. We'd rather answer your questions before you order.

Why buy this from Happy Hydro?

Happy Hydro has been selling growing equipment since 2006. We've carried AC Infinity for years because the systems work great and customers who buy them leave happy. Have questions before you order? Call 716-217-0353 or email help@happyhydro.com. We're easy to reach and happy to help!

Questions? We're easy to reach.

Happy Hydro has been serving growers since 2006. Call or email us before you order, after you order, or any time something comes up. When you're happy, we're happy.

716-217-0353 help@happyhydro.com

Why Happy Hydro

Why Buy From Happy Hydro

Happy Hydro began as a pipe dream in a garage and has grown into something built almost entirely on word of mouth and repeat customers. Rather than focusing on raising margins and obsessing over profits, we've always believed that the right combination of competitive prices, superior products, and world-class customer service speaks for itself. Our philosophy will never change: when you're happy, we're happy.

Our commitment

What you can expect from Happy Hydro

Real People, Real Growers

Our grower support team isn't a call center. They know the products because they're passionate about growing. Reach us Monday-Friday, 10 am-4 pm EST at 716-217-0353 or help@happyhydro.com, before you order or after.

Hand-Picked by Growers, for Growers

Every brand we carry was chosen by our founders because it performs. We only stock premium brands we believe in, and every item is inspected before it leaves our warehouse.

Fair Prices and Free Shipping

We work hard to keep our prices as low as manufacturers allow, and we include free shipping on orders over $49 so there are no surprises at checkout. Find a lower price anywhere and we'll match it.

Authorized for Every Brand We Carry

We're an authorized dealer for every manufacturer on our site. That means you get the full manufacturer's warranty on every purchase. No grey market, no expired stock.

30-Day Returns on Most Orders

Hard to commit to a product you haven't tried. Return most items within 30 days in original condition and we'll take care of it. Read the full policy.

Secure Shopping, Private Data

Every transaction is SSL encrypted. We don't store payment information and we will never sell your data to anyone, ever.

Volume and Commercial Pricing

If you're a commercial grower or putting together a large order, reach out before you buy. We have pricing available that we can't advertise publicly. Call 716-217-0353 or email help@happyhydro.com and we'll take care of you.

Questions? We're easy to reach.
Happy Hydro has been serving growers since 2006. Call or email our grower support team Monday-Friday, 10 am-4 pm EST, or email us anytime.