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

The AC Infinity exhaust fan is a top-notch choice for anyone needing effective ventilation. It’s incredibly efficient at moving air and keeping spaces cool, which is perfect for managing heat in various settings like grow tents or workshops. The fan operates quietly, a major plus if you're sensitive to noise, and the build quality feels durable and reliable. Installation is straightforward, and the adjustable speed settings allow for customized airflow. Overall, it’s a well-engineered product that performs exceptionally well, making it a valuable addition for maintaining optimal conditions in any 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.

The AC Infinity Cloudline Pro T4 has completely transformed my grow setup. The highlight is undoubtedly the advanced smart controller, which gives me full control over humidity, temperature, and even air pressure. It’s like having a personal assistant for my grow tent! The automation features are incredible—once you set your desired parameters, the fan adjusts itself to maintain the perfect environment without any manual intervention.The fan operates quietly yet delivers powerful airflow, making it ideal for any controlled environment. The controller’s interface is user-friendly, with clear readings and precise adjustments. I love being able to monitor and tweak settings remotely through the app—it adds an extra layer of convenience and peace of mind.This fan not only ensures optimal conditions but also helps save energy by running only when needed. Whether you’re growing plants, ventilating a space, or managing a server room, the Cloudline Pro T4 is in a league of its own. I couldn’t be happier with this purchase. Highly recommend it to anyone who demands precision and reliability!

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.