AC Infinity Cloudline S6 Quiet Inline Duct Fan System with Speed Controller 6"

I bought a T-6 and a S-6. Both fans work great’ quiet and dependable. Easy to set up and the programing was a breeze. I thought I had a Bluetooth controller but found out I did not when I tried to connect. I called Infinity and they graciously offered to replace it at no charge. They even let me keep the one I had until theirs arrived. They even covered the postage! Three thumbs up from me! Oh and they also do a fantastic job regulating my grow tent! I like this product. Have not used the filter yet but I’m confident it will do as advertised when the time comes.

As an electrical engineer: Great product.

I now have two S6's in my home in different applications and am quite impressed with them. As an electrical engineer I have worked for a major international industrial controls company for 25+ years, have 12 patents and understand some about motor design, PWM motor control, heat dissipation and effects of static pressure. In my view these are well thought out and designed products. One S6 is 3 ft from plenum and pushing air through 20 ft of 6" duct and 4 90 degree elbows. The 2nd S6 is in the middle of about 8 ft of 6" duct and 4 elbows with a merv 12 filter on the intake side and I estimate around merv 2 equivalent restriction on the exhaust. I don't know the mfg specified static pressure drops but I estimate around .3-.5" wc for the merv 12 and maybe .1-.2" for ... MoreI now have two S6's in my home in different applications and am quite impressed with them. As an electrical engineer I have worked for a major international industrial controls company for 25+ years, have 12 patents and understand some about motor design, PWM motor control, heat dissipation and effects of static pressure. In my view these are well thought out and designed products. One S6 is 3 ft from plenum and pushing air through 20 ft of 6" duct and 4 90 degree elbows. The 2nd S6 is in the middle of about 8 ft of 6" duct and 4 elbows with a merv 12 filter on the intake side and I estimate around merv 2 equivalent restriction on the exhaust. I don't know the mfg specified static pressure drops but I estimate around .3-.5" wc for the merv 12 and maybe .1-.2" for the merv 2, so including ducts prob have .5 to 1" pressure drop. These blowers don't seem to mind the static pressure (sp) at all. The speed control is great. 8 different speeds and no matter which is selected the fan slowly ramps up to it in around 5 seconds so no sudden air noise. Amazing amount of air moved especially considering the resistance of the sp. Overall very quiet, hardly noticeable on 1st 4 speeds, and still surprisingly quiet on higher speeds moving huge amounts of air. On a switched outlet the fan remembers and uses the last used fan speed. Also good mounting options are provided by a flat mounting plate securely bolted/riveted to the fan housing. The intake and exhaust diameters seem a bit small to me when interfacing to 6" rigid duct (more space than I expected to tape over to seal) but that may be so that flexible duct can be easily slipped over either side and clamped. At various speeds in both applications I have had consistent and quiet operation with no signs of over-stress on the motor. In my view the entire product development team did an outstanding job. This is the first (or maybe second) product I have reviewed in 10 years but, as a technical person in a similar field, felt strongly enough and felt there might be some value to sharing my views. I actually don't know how the product could be improved other than maybe increasing the interface diameter a bit though as mentioned there may be good reason to leave as is. Price could be lowered but I wouldn't want to give up any of the build quality, air-moving capability/power at my higher sp's, quietness, reliability, smooth start up or speed control options. Just so you know, AC Infinity had no idea if or what I would share in response to their automated (I'm sure) request for feedback on my latest purchase.

Cloudline Inline Duct Fan.

Purchased two of these after receiving a demonstration of the performance and capability of these impressive units. I explained to Soren my current set-up (which needed improvement) and Soren ran me through various units. This unit was chosen as it more than capable of providing the required airflow while working at low to moderate speed. No good buying a fan you need to run a max capacity- you will burn it out quickly yes? The fan does produce low noise; however, standing several meters away (3-4) , you couldn't tell if it was on or off. Excellent construction, made to last the distance and does exactly what it is designed to do. My plants are very happy so money well spent!

GREAT PRODUCT

I’m usually a “lurker NOT a commenter” but with this product I make an exception.I picked up a S6 fan to replace an older cheap duct fan to move air from a room with a wood stoveTo the hallway in front of the bedrooms a distance of about 30 feet.The construction of the fan looks to be of EXCELLENT quality, not some cheap plastic junk.It’s almost too good looking to stick in the ceiling.The quality mounting equipment that comes with it is a real plus.The only fault I found was where the duct attaches to the fan. I found it to measure 5 ¾ inches but that can be fixed with a strip of cardboard on the mounting flange.The motor itself makes almost no noise.BUT BE ADVISED….. You WILL hear the air movement… Remember, that’s why you bought the fan in the first ... MoreI’m usually a “lurker NOT a commenter” but with this product I make an exception.I picked up a S6 fan to replace an older cheap duct fan to move air from a room with a wood stoveTo the hallway in front of the bedrooms a distance of about 30 feet.The construction of the fan looks to be of EXCELLENT quality, not some cheap plastic junk.It’s almost too good looking to stick in the ceiling.The quality mounting equipment that comes with it is a real plus.The only fault I found was where the duct attaches to the fan. I found it to measure 5 ¾ inches but that can be fixed with a strip of cardboard on the mounting flange.The motor itself makes almost no noise.BUT BE ADVISED….. You WILL hear the air movement… Remember, that’s why you bought the fan in the first place.My fan is about 6 feet from the intake register but I have found that a setting between #3 and # 4 ,like others have said, moves plenty of air with very little noise.At #8 the thing cranks!!!I have no doubt that this fan will solve my air movement issue.

Great product

I purchased two of these Cloudline S6 Inline Duct Fan, one from Amazon and the other from AC Infinity website within the past month. After the first purchase, I was so pleased with the engineering and quietness of the product, that I purchased the second one directly from AC Infinity. Both options worked out very well. The Fan is very powerful and well constructed. I preferred the manual speed capability verses the electronic version because I used the product to move cool air from an AC'd room to an adjacent room and wanted the flexibility offered by the manual control. There are several speeds available. I place my generally at the lower settings. The airflow is continuous and stable, with no change in air speed. The only noise generated is the sound of the air ... MoreI purchased two of these Cloudline S6 Inline Duct Fan, one from Amazon and the other from AC Infinity website within the past month. After the first purchase, I was so pleased with the engineering and quietness of the product, that I purchased the second one directly from AC Infinity. Both options worked out very well. The Fan is very powerful and well constructed. I preferred the manual speed capability verses the electronic version because I used the product to move cool air from an AC'd room to an adjacent room and wanted the flexibility offered by the manual control. There are several speeds available. I place my generally at the lower settings. The airflow is continuous and stable, with no change in air speed. The only noise generated is the sound of the air movement thorough the vent pipe and the register I installed toward the top of the ceiling. My only observation is that I wish there were a way to turn off the unit without having to cycle through the entire speed cycle. Otherwise, this is a well built solution that serves my needs perfectly. Highly recommended.

Great quality

Great to see a company that takes pride in their product. AC Infinity is top notch. Never heard such a quiet fan, ever. Period. Oh and the service from QBL is second to none! Best customer service around. Its a breath of fresh air to say the least. Hats off to you guys! ⭐⭐⭐⭐⭐⭐ its 6 stars from me.

Much better than the competition

I have 2 cheaper fans which were adequate. The AC Infinity blows them out of the water in every regard. The AC Infinity is a bit more expensive than the others but is whisper quiet with power to spare. The value add-on in the box from duct clamps to high quality straps, even velcro ties for cables. It was super simple to set-up and can with a pretty good grow guide in the box. I can’t wait to upgrade my other 2 fans and wish I had been smart enough to buy one 6 inch AC infinity which would be more effective than the 2 cheaper 4 inch fans I already had.

On Cloud 9 With Cloudline S6

Could not be happier! A recent home ventilation project put me in search of a decent inline duct fan. Was fortunate to find AC Infinity during my research. Within 24 hours of placing my order for the S6, Kenny was kind enough to call and email me advising that a peripheral accessory that I also order was on a short backorder. He asked whether to hold the order for the b/o item, or send separate shipments. I was so impressed with this terrific customer service! I advised Kenny to please ship the S6 which was immediately available. With a week, the S6 safely arrived, and was well packed. The S6 itself is so intelligently designed. Lightweight, but robust, with a clean, efficient, and practical design. Once installed, I was (and remain) amazed with how quiet but ... MoreCould not be happier! A recent home ventilation project put me in search of a decent inline duct fan. Was fortunate to find AC Infinity during my research. Within 24 hours of placing my order for the S6, Kenny was kind enough to call and email me advising that a peripheral accessory that I also order was on a short backorder. He asked whether to hold the order for the b/o item, or send separate shipments. I was so impressed with this terrific customer service! I advised Kenny to please ship the S6 which was immediately available. With a week, the S6 safely arrived, and was well packed. The S6 itself is so intelligently designed. Lightweight, but robust, with a clean, efficient, and practical design. Once installed, I was (and remain) amazed with how quiet but powerful this unit is. The speed controller provides simple but complete control over how much air the S6 can move, with good visual feedback of the current setting. Bottom line: I am very impressed with the S6, and with the wonderful customer service that Kenny provided (so rare these days!). I highly recommend the Cloudline series. Do your research before you buy ... you'll be so happy with AC Infinity!

Quiet at low speed

This model S6 fan is decent for the 100 and some dollars, appearing to be better made than most others anywhere near the price. There are two negatives points and one disappointing issue. The specs for CFM and noise are valid, but there is deceit by omission here, since these two specs, 402 cfm and 32 dB, are mutually exclusive. The cfm rating is at maximum speed, and the noise rating is at the minimum speed. Expect another 20 dB at maximum speed. You could get lower noise levels if both sides of the fan are ducted. The only control is a single push-button. If you are at the lowest of 8 speeds, it takes eight pushes to turn the fan off. A similar exercise is required if you wanted to lower the speed by one notch. The good part of the controller is that the last ... MoreThis model S6 fan is decent for the 100 and some dollars, appearing to be better made than most others anywhere near the price. There are two negatives points and one disappointing issue. The specs for CFM and noise are valid, but there is deceit by omission here, since these two specs, 402 cfm and 32 dB, are mutually exclusive. The cfm rating is at maximum speed, and the noise rating is at the minimum speed. Expect another 20 dB at maximum speed. You could get lower noise levels if both sides of the fan are ducted. The only control is a single push-button. If you are at the lowest of 8 speeds, it takes eight pushes to turn the fan off. A similar exercise is required if you wanted to lower the speed by one notch. The good part of the controller is that the last speed used is remembered if power is removed, such as with switching the AC power line. The bad part is that the memory is in the corded controller, and without the controller attached, the fan will only run at maximum speed. Despite it's flaws, I am buying more of them, since they move a fair amount of air at the lowest speed, probably well over 100 cfm.

Wish this would have been my first Fan purchase

Awesome, no operational vibration or reverb noise. Completely silent motor. Moving more air thru duct set on speed setting 3, than previous install unit did at any setting. Standing next to it and can not hear it running. Can not feel running by touch either. Only sound (manageable by speed) is air exiting register. Awesome, replaced that load, vibrating, resonating Tjernlund EF-6, and SC-1 speed controller. Also, CloudLine S6 works very well with previously installed PS-1503 Duct Airstats Pressure switch. Installed between rigid duct using a 1/4 to 1/2 gap between fan and duct, joining using 2 1/2 inch neoprene lined clamps. Once again enjoying 4 seasons room without load and annoying vibration and reverb resonating throughout the house. Also had some questions ... MoreAwesome, no operational vibration or reverb noise. Completely silent motor. Moving more air thru duct set on speed setting 3, than previous install unit did at any setting. Standing next to it and can not hear it running. Can not feel running by touch either. Only sound (manageable by speed) is air exiting register. Awesome, replaced that load, vibrating, resonating Tjernlund EF-6, and SC-1 speed controller. Also, CloudLine S6 works very well with previously installed PS-1503 Duct Airstats Pressure switch. Installed between rigid duct using a 1/4 to 1/2 gap between fan and duct, joining using 2 1/2 inch neoprene lined clamps. Once again enjoying 4 seasons room without load and annoying vibration and reverb resonating throughout the house. Also had some questions before ordering and Customer Service was very quick to respond and answer. Only been installed for a week during heating application, hoping it holds up well and serves as well during cooling application.