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CLOUDLINE H-SERIES
Made For Fungiculture
The first inline fan designed to withstand up to 99% relative humidity, perfect for fungi growth.
Easy Environmental Automation
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Innovative Ventilation
Connect this duct fan to CONTROLLER 69 or later (sold separately) and download the AC Infinity app to access custom activation using climate triggers, grow cycles, scheduling, and automation programming.
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Advance Programming
Create automation for your devices to systematically manage your grow tent environment. Set customizable alerts that can trigger to almost any event.
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Greater Environmental Insight
Interactive graph intuitively displays temperature, humidity, and VPD data. Input target figures to help your grow tent approach and maintain your ideal environment.
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Active Monitoring
Stay on top of what's happening in your grow space using alerts and notifications so you can quickly counteract any environmental spikes.
Kindle Customer
August 21, 2025
I really like their product line and the UIS interface to control them. They have very good customer support. You can use the Controller pro 69 series to control multiple devices and simplify controlling your grow environment.
Justin
August 19, 2025
Got this to use in our basement green house for when we start getting the plants ready for the garden in the spring. I finally got to hook this up, and it does exactly what we wanted it to!Easy to connect, the speed controlled works great, and it move more than enough air to get the job done. If you have an indoor greenhouse that needs some circulation, this is a great item!
LNN
July 6, 2025
I’m really happy with the AC Infinity CLOUDLINE H4 fan! I’ve been using it for my mushroom growing setup, and it’s made a big difference. It is amazing quality and durable, as expected by AC Infinity. The fan is super quiet so it doesn’t disrupt the peace, which is a huge plus for me. The IP65 rating is perfect because it’s resistant to moisture and dust, which is essential for my high-humidity grow space. The speed controller lets me fine-tune the airflow, helping prevent CO2 buildup and keeping the climate just right. I love how reliable and energy-efficient it is, and it’s definitely improved my setup. I highly recommend it to anyone who needs a quiet, effective ventilation solution!
Buizel Vela
July 2, 2025
I've used a majority of their products, and the Cloudline fan never fails. I've had this particular model running for a few months now with no issue. The controller is easy to use and clearly shows how fast the fan is spinning with the led indicators. Without it, you really have no control over the jet engine of power it outputs.Attached to the carbon filter and ducting, you can set up a filtration system for any grow tent. I've used my set up for a variety of plants, and now a resin printer. It's probably not the intended usage, but it really cuts down the smell. Plus, with the higher settings, it filters out air fast. This fan seriously takes off with power.Overall, a great product that has a notable longevity about it. Not only that, but it's super powerful - able to act as exhaust or intake for any grow tent setup.
D
June 14, 2025
I've had a lot of AC Infinity products, and I have always been impressed with them. This 4 inch inline duct fan works well. It does come with a speed controller, but I have an AC Infinity programmable controller that I use with this instead. Using a programmable controller is not required but if you want to automate this fan, you can. The fan is not very loud and has a max airflow of 212 CFM. I use this for is some small boxes and pulls plenty of air for that. I run it at a lower speed instead of full speed because in my experience, it extends the life of the fan. All in all, this fan is good quality and works well.
Footprints
June 6, 2025
I don't have other units to compare it to but given that my first experience has been positive I'm going to go out on a limb and say this should work well for you.
Gilbert
May 3, 2025
This inline duct fan is an excellent choice for ventilation in grow tents and mushroom chambers. The speed controller allows for precise adjustments, and the quiet operation is a huge plus. The build quality is solid, and it moves air efficiently to maintain the perfect growing environment. A must-have for serious growers!
Ricky Ray
January 16, 2025
AC Infinity, the Apple of the grow world, delivers again with this duct fan, which blows hard and seems like it'll hold up when the growing gets tough. 4" isn't really worth the money, though, considering how much more effective and powerful a 6" fan is in comparison.
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