AC Infinity CLOUDLINE A4, Quiet 4” Inline Duct Fan with Speed Controller, EC Motor - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

The AC Infinity CLOUDLINE A4 Quiet 4” Inline Duct Fan has set a new standard of excellence in the realm of ventilation technology. From its whisper-quiet operation to its unmatched performance, this fan stands head and shoulders above its competitors. What truly sets the CLOUDLINE A4 apart is its advanced design and innovative features.First and foremost, the whisper-quiet operation of this fan is nothing short of remarkable. Even at full speed, it produces minimal noise, making it ideal for environments where noise pollution is a concern. This feature alone sets it apart from other inline fans on the market.In addition to its quiet operation, the CLOUDLINE A4 delivers exceptional airflow performance. The precision-engineered fan blades and powerful motor work in perfect harmony to move air efficiently and effectively. Whether you're ventilating a grow tent, cooling a server rack, or maintaining optimal airflow in a HVAC system, this fan gets the job done with ease.The built-in smart controller adds another layer of convenience and functionality to the CLOUDLINE A4. With the ability to adjust fan speed, set timers, and monitor temperature and humidity levels, it offers unparalleled control over your ventilation system. The user-friendly interface makes it easy to customize settings and fine-tune performance to meet your specific needs.Durability is another area where the CLOUDLINE A4 shines. Constructed from high-quality materials and built to withstand the rigors of continuous use, this fan is built to last. Whether you're a professional HVAC technician or a DIY enthusiast, you can trust that the CLOUDLINE A4 will provide reliable performance for years to come.Overall, the AC Infinity CLOUDLINE A4 Quiet 4” Inline Duct Fan is in a class of its own. Its combination of whisper-quiet operation, exceptional airflow performance, advanced features, and durability make it the clear choice for anyone in need of a superior inline duct fan. Simply put, it's the best of the best.

Edit:I like this fan way to much to leave the one star review in place. I still stand by my original reasoning but can't help liking and even emphatically recommending this fan based on how well it works and the overall look and feel of the build quality. At the second of 10 speeds the sound from the fan itself is hard to discern although there is a very noticeable woosh from the air itself flowing through the opening of the tube on my desk. Even at this low speed it seems to provide enough ventilation for me.Original review (1 star):Ignore the noise ratings and probably any claims really. It's a fan. It sounds like a fan and moves air like a fan.The whisper soft 29dba or w/e it is supposedly rated for is more like 70+ in reality. Based on how grossly that was misrepresented I can only imagine the airflow and power ratings are likewise no where near reality.That all being said, I really like the fan I received. It's not what was advertised but I pretty much expected that going in so... The noise is pretty loud at mid to high settings but is mostly a loud but soft woosh sound and with the hose attached I doubt it would bother most people. I plan to use it for venting solder fumes and it will likely be plenty powerful at it's lowest settings which is actually almost silent to it's credit, although customer service on their website flatly stated the unit was tested for sound at max speed with hoses off.Can't give it 5 stars because the fan does not live up to the promises in the listing, but it's a pretty good fan none the less, just know what you are getting into. If you need to rely on the specific performance data for any reason I would suggest buying something legit, otherwise if you just need a fan this one's pretty decent.

These AC Infinity fans are really a great fan. They pull the smoke out and work really well. I have purchased 3 of these in the past for different applications and they all work very well! They are not really heavy, they stay put on the floor or you can mount them with the mounting bracket. They are easy to use, have a remote and do what they are intended to do. I did not use them for temperature control only for an exhaust fan. They value for these is really good also as they are not really expensive for this type of fan! I highly recommend these fans.

I use this fan to push fumes out of my resin 3D printer enclosure (through some tubing). It works great; it can go from very quiet on low to pretty loud on full blast, but I guess it's probably quieter than some fans, and I don't expect it to be quiet when the air is moving that fast. I haven't had any issues with it, but I don't use it super often, just when I need to clear the air. It's a little expensive for what it is, but I'm sure it would be a workhorse if that's what you need from it.

This fan has worked well for the fresh air system in our home. I do admit as soon as you hook it up to a flex duct, the airflow goes way down as the 4” one isn’t crazy powerful. I’m actually using 8” ducts with the 4” fan at this point without shrouds and it flows a good amount of air. It runs from a screen in the soffit to the fan, into the filter box, out of the filter box to mix with recycled air, and into my dehumidifier. The speed control works well to dial in the amount needed to keep pollutants at a low level inside. Overall, a good fan! I also installed a portable system in my mother’s mobile home and for one person, the 4” setup is perfect.

This is the best exhaust tent fan on the market imo. It's super durable, easy to clean and works seamlessly with the AC controller pro 69. Ive had a handful of exhaust fans but this one really takes the cake. It's got 10 different speeds that work wonderfully. The max is of course a little loud but the air pull from it is perfect for a 3x2 tent. BUY this plus the controller and your set. Really nice combo.