AC InfinityCLOUDLINE PRO T4, Quiet 4” Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control - Ventilation Exhaust Fan for Heating Cooling, Grow Tents, Hydroponics

There isn't a whole lot of information on this unit. This is exactly what it comes with, and how it works. By the way I'm NOT affiliated, nor know AC Infinity I bought this full price to handle a solar air heater.*EDIT* The below information was on the ORIGINAL 12v Cloudline T4. I bought it again and found out the they've been redesigned and newer models are 24v instead of 12v and NOT compatible with each other (yet look and connect identically I blew my fan plugging the original 12v fan into the new 24v controller). The newer model has more CFM, a longer probe, and has a temperature&humidity probe in one instead of just temperature probe and they've done away with the smart mode feature. Most people would probably welcome the improvements, used for solar heating it's best with the smart mode feature they removed in the new so I ended up returning the newer style and finding another original 12v style. For solar heating, Auto mode of the new would've allowed 2 speeds and switched between them (off, medium, alarm speed) which is okay I suppose... but the smart feature of the original allowed 6 speeds for solar heating and was adaptive to minimizes fluctuations (basically perfect for my solar air heating project) so to me removing the smart feature in the new was devastating.Hardware: The fan comes with a controller, a stencil for mounting said controller, a thermal probe with 8' cord, 4x screws for mounting controller, 4x screws for mounting duct fan, duct fan, 4 drywall anchors, a 2 prong sideways power adapter with 6' cord that converts 100-240V AC 0.8AMax to 12V DC. The controller states Power: 12V DC 4A Output: 12V DC 30W MAX), 6x wire ties, 6x cable mounts, 6x wood screws, 2x 4" duct clamps. The controller can accept 2 fans, as of this review they don't sell another fan separate. I also assume the controller saying 12V DC 30W MAX is with 2 fans attached. The power adapter is small and thin and goes sideways into the wall or surge strip. That means it's one of the better design power adapters that can plug into any outlet of a surge strip and won't block any other outlets nor need to go into the "power adapter" port of a surge strip.The fan uses a quiet PWM motor, 6 speeds, and of mixed flow design. That means it's a jack of all trades kind of fan. Axial fans (think computer fans) have the greatest ability for air flow but poorest ability to overcome static pressure. Centrifugal fans (blowers) have the greatest ability to overcome static pressure, but the poorest air flow of the bunch. This fan is the jack of all trades having both good air flow and ability to overcome static pressure, and likely the most useful for most situations compared to axial or centrifugal. Mixed flow are also the quietest of the different fan types. The fan is IP44 rated (resistant to fluids, dust, heat, and humidity), has dual ball bearings rated to 67,000 hours, the fan can be mounted in any direction, and the thermal probe is stainless steel. The 8' probe cannot be extended nor replaced with a longer as of the date of this review (it has a unique beginning and end), but I had to have the probe 15 feet away so cut the wire to the probe and inside was just normal 2 wire (red/white). I inserted/soldered a 10 foot piece of thermostat wire to extend it, used some shrink tubing and hair dryer to protect it, and then siliconed and had over 20' probe that worked perfect.Installation instructions are clear and illustrated. 1 page is features, 1 page is included hardware, 1 page a diagram, 5 pages installation instructions, 3 pages Power and Setup, 2 pages cleaning instructions, 6 pages programming instructions, 1 page other AC Infinity products, 1 page warranty.The controller displays the fan trigger temp, alarm temp, probe temp, fan speed, brightness (3 settings available), and alert icons (fan failure, alarm, or display lock). The display can be changed from F to C, and maintains settings (in case of power failure). The display can also be turned off and unit still function (by hitting the leaf button).Modes:On = Fans run 24/7 at any of the 6 speeds you set.Auto=Fans will turn on at the speed you set in the On mode once the set temperature is reached. To prevent cycling, it will turn off once it reaches 4F lower than the set temperature (this can be changed to 2F instead). If the Alarm temp is reached the fans will go to max speed and beep every 3 seconds until temps drop below the Alarm temp.Off = No fansSmart = *This mode has been removed and no longer available only the 12v model has it the newer 24v does not* You set the temperature when you want the fan at max speed, and every 4F (can be changed to 2F) the fan speed will lower. This means you put the controller in smart mode and put the temperature to say... 100F. At 80F the fan will automatically turn on the lowest speed (speed 1). At 84F it will go to speed 2, 88F speed 3, 92F speed 4, 96F speed 5, and 100F speed 6. If the alarm temp is reached the fan speed will jump to max and beep every 3 seconds. This means there's a max of 20F between lowest speed and max.Alarm=You set the alarm temp, and when reached the fans will go to max speed regardless and beep every 3 seconds. Only works in On, Auto, or Smart. It can also be turned off. It also can't be set higher than 140F.To lock the controller, you hold the mode button down for 3 seconds. The controller will still function, but pressing anything will cause the lock button to blink only, and not affect anything. Holding it down for 3 seconds again will unlock it.The buffer defaults to 4F or 2C temp difference, but can be set to 2F or 1C.This is a well thought out and built unit. Comes with nearly all the hardware one could need, is easy to setup, the instructions are easy and well illustrated, and the unit is quiet with decent power to overcome static pressure. This is exactly what I needed for my solar air heater. The only odd thing is, the display has 3 brightness settings however it was missed in the manual how to change it. I tried every combo of buttons and holding them down to see if I could change it to no avail. Not that I wanted it dimmer, I was just curious.

This is the best inline fan in the market. I can link up to it from anywhere in the world as long (as i have Internet connection) and not only monitor the environment but make adjustments manually or automate the system to stay at the desired temp, humidity or vpd... this device is a muddy have for any grow space!!!

I bought this to replace a bathroom exhaust fan. I gutted the motor and cage out of the old one, used the power feed to power an outlet for this unit up in the attic and installed the fan between the old housing and the exterior vent. I drilled a small hole where ceiling and wall meet to poke the sensor out and installed the control on the wall just below. Set the fan to turn on at certain humidity and temp levels and forget about it. Now I don't have to worry about excess moisture causing mold, etc. Not sure it was designed for this but works like a charm and is quiet. Much cheaper than the Panasonic fans I was looking at and a higher static pressure to pull that moisture out.

I just found out this package came a few days ago with a AC Infinity 69 "Pro" controller!!! Very satisfied with this. I don't know what all the Pro has above and beyond the regular 69. I do know one thing is the vapor pressure deficit. Let me do a regular review and then I'll mention VPD again.OVERALLOverall I'm very happy with this system, it's letting me play mad scientist and create my own environment while doing something I love, growing plants. Tomatoes, sage, bamboo currently. It's a tiny bit noisy (see the humidifier section), so you probably don't want it in your bedroom if a little clicking is going to keep you awake.FANI've had this setup a few days and I'm mostly satisfied with it. The fan is nice, it doesn't feel like it pushes that much air but for a smaller space it's adequate, I use it on a 2x4 space. The fan bracket keeps the fan pretty close to the bracket so depending on your installation you're going to be stretching to get the bolts into the holes. It works in the end, but clearances are tight. Make sure you account for any ducting that attaches to the fan in your install.CONTROLLERThe controller is the star of this show. I was looking at the controller and saw this extra number on the screen that wasn't in the AC Infinity 69 manual. It's kPA, kilo-pascals. I did a little googling and realized I had the Pro controller! This kPA number measures the vapor pressure deficit. It basically means you need to keep your humidity in your grow space up around 60-70% to get your plants in the zone where they don't spend their energy in transpiration. Basically, when there's not enough water vapor in the air, plants will emit water vapor. If you have a high VPD you're watering your plants more than needed and they are working hard producing nothing but effectively sweat.Otherwise, if you're not used to thinking in terms of a state machine, you'll find this controller confusing. You have to cycle through several modes and then press non-intuitive buttons to program the thing. You'll be referring to the manual often, which is fine. This is actually a pretty powerful little controller, it does so much!The only thing it doesn't seem to do, which the docs seem to say it will do, is to have the fan respond to two inputs. Supposedly you can set the high temperature threshold in that mode, then cycle to the mode for high humidity and set that threshold. Then in theory the fan will control both head and too much humidity. (I'm not worried about humidity during the "day," it's at night when the plants transpire in the dark I want the humidity controlled. This controller doesn't seem to do both.ECOSYSTEMDon't forget, unless you buy all your parts from AC Infinity, you'll need some of the AC outlet controller boxes. I needed three, two for my Mars Hydro lights, and one for my cheapo humidifier. These boxes are $20 each as of this writing so that's another $60 laid out to get this system working.HUMIDIFIERJust a final note, you can really skimp on the humidifier. You don't need warm mist, and you need a non-computerized one that simply starts up when the power is applied, without the user intervening. I found one for $25 and there was a Amazon Warehouse deal for $16. It came with a couple hairs yuk gross but I save $9.

This thing is quiet and I got lucky and got the AI controller. I don’t see that as an option to buy it that way, so maybe they are upgrading and just haven’t updated the listing. With that, it was a bargain to say the least.try your luck if you’re needing a fan and controller.