

💨 Elevate your indoor air with power and silence—because your space deserves the best!
The AC Infinity RAXIAL S8 is an 8-inch inline booster duct fan delivering 428 CFM airflow with ultra-low noise at 43 dBA. Featuring a variable speed controller and durable unibody die-cast construction with dual ball bearings, it optimizes ventilation for basements, bathrooms, kitchens, and workshops. Designed for professional-grade HVAC enhancement, it balances powerful performance with whisper-quiet operation.









| ASIN | B07ZPF4NRX |
| Air Flow Capacity | 428 Cubic Feet Per Minute |
| Best Sellers Rank | #37,955 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #83 in Household Ventilation Fans |
| Blade Length | 8 Inches |
| Brand | AC Infinity |
| Color | Black |
| Control Method | App |
| Customer Reviews | 4.3 4.3 out of 5 stars (8,392) |
| Date First Available | January 8, 2020 |
| Efficiency | High |
| Electric fan design | Blower |
| Finish Type | Matte |
| Global Trade Identification Number | 00819137021129 |
| Included Components | Cord |
| Indoor/Outdoor Usage | Indoor |
| Is Cordless? | No |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4 pounds |
| Item model number | AC-RXS8 |
| Main Power Connector Type | Standard Wall Outlet Plug |
| Manufacturer | AC Infinity |
| Model Name | RAXIAL S8 |
| Noise Level | 43 Decibels |
| Number of Blades | 5 |
| Number of Power Levels | 3 |
| Power Source | AC |
| Product Dimensions | 7.28"D x 7.95"W x 7.95"H |
| Recommended Uses For Product | Indoor |
| Room Type | Basements, Bathrooms, Kitchens, Workshops |
| Size | 8" |
| Special Feature | Speed Controller |
| Style | Duct Fan |
| Switch Type | Push Button |
| UPC | 819137021129 |
| Voltage | 120 Volts |
| Wattage | 46 watts |
J**D
More solid and cheaper than local
Rented out a house where I had to run heat to a bedroom and bathroom that the previous owner converted from a garage. Ran duct instead of the baseboard heater that was previously installed. It was a pretty long run, about 35' of 8" ducting and a couple branching off of that. 4 total registers. Went to the orange store to buy one of these but they didn't have the 8" in stock. Said I'd have to order it online and when It comes to that, I'd rather just order it on Amazon. This thing is solid. Metal fan blade, pretty solid housing. And cheaper than the store by about $20. Probably got it faster than if I'd ordered from the store too. The housing is a little smaller than a normal metal pipe but it wasn't a major difference and was a tight fit with the tape. I supported it from the ceiling because it has a little weight to it but that's a good thing. It actually looks nice, too bad it's mostly covered by the other ducts. Love the fact that it has a speed control on it, makes it more adjustable. It's not just 3 settings, it has "off" and all the way up to high is incrementally adjustable. It pushes some serious air. Without it attached to the duct work, it seemed like it was pretty loud on high but with it attached, it's no louder than the furnace. I also got a BN-LINK Heat Mat controller because the one at the store looked old, clunky and awkward. It was also more expensive. So I got that and it works great when the furnace is on and turns off when the furnace turns off. I'm happy with the setup and the price. Tenants love it because it makes that bedroom and bathroom warm like the rest of the house. Sorry for the long post but I like to give credit for a good product and show how I ended up using it.
I**O
It's really quiet on the lowest speed
Pretty great fan, it's really not loud, I tried a lot of them, and this is very quiet, almost not hearable at the lowest speed
K**Y
Not sure about the noise level
I bought this S6 fan to create some circulation in my basement The fan works well and seems to be well-made. My basement is about 2000 sq feet and is chopped into these three main areas: Space A. Unfinished area (about 350 sq feet) Space B. Main living area (about 1200 sq feet) Space C. Exercise/rec room. (450 sq feet) Space A connects to Space B via a door. Space B connects to Space C through another door. Space C does not connect to Space A directly. We have a humidity/mold problem throughout the basement, so I installed a dehumidifier in Space A. I wanted to pull air from Space C over the wall into Space A then push it out to Space B and back to Space C to complete the cycle. I am hoping that by circulating some air through space A the dehumidifier will dry out the whole basement over time. My dehumidifier is rated to process 160/190 cfm on its two speed settings. So I bought this 265 cfm AC Infinity S6 fan and 8' of 6" flex duct from AC Infinity as a circulation fan. My configuration is as follows: I cut a a 6" round opening in the Space C ceiling. I put a 90" hard elbow there and attached the 8' of 6" duct that terminates in Space A. In Space A at the other end of the duct I mounted this fan onto a 12x4x6 90-degree register box and a 12x4 diffuser. I hope to pull over some air from Space C past the dehumidifier. Issue: After completing the install, the noise level in Space C at all fan speeds (where the intake vent is) is higher than I would have liked. I measured some dB readings with my iphone app and here are the results. [NOTE: For reference, in this next part I am looking at the speed control's dial like a clock face, where you have the "off" position at the 6:00 (bottom) position. Then "Low" is at 8:00. "Medium" is at 12:00 (top). And "High" at 4:00 position.] While the controller seems infinite, there are really only three or four distinct areas of power/noise: At the 8:00 and 9:00 position, the noise level in space C is about 40 dB. At 10:00 position it jumps to 49 dB (nearly ten times louder). At 11:00 - 12:00 it is about 52 dB. Then at the 1:00 position it jumps to 54 dB and doesn't really get much louder from there. Recall that the dB scale is logarithmic, not linear. If there is a relationship between noise and cfm, then between the 1:00 position and 4:00 position, it seems there is very little air volume increase. I am not an HVAC engineer nor a sound expert, but it seems you have a low 40-ish dB setting, a low 50-ish dB setting and then a 54 dB setting, all as measured on the inlet-side vent, which for me is 8' from the fan. I would like to make it quieter in Space C because my wife spends a lot of time down there, and she doesn't tolerate noise well. I don't really care about the noise level in space A, as it is not occupied and the dehumidifier (generating 52 - 54 dB) is in there too. But for reference, with the fan attached right to the register outlet box, the noise levels in Space A (without the dehumidifier running) are 2 - 4 dB higher than the above readings from under the inlet vent in Space C. Note: I have 9' basement ceilings, and I took all measurements directly beneath the vents at 5' up from the floor. Not a scientific result, but I hoped to give you all some idea of the noise levels.
P**L
Solid cheaper option but not much air movement
This is a good inline option for the price, doesn’t move the most air but it’s pretty durable. Not too heavy easy to instal. There are better options but this one works for the beginner
T**Y
Works great, pushes enough air for my purposes at Medium
I have a 2 story house. Upstairs is hot in summer. Brand new furnace and a/c. I installed 2 boosters. One for each bedroom upstairs. It works great. These replaced other ones I had installed 5 years ago that did not have an adjustable speed. Those worked but were so loud and blasted almost too much air. These are perfect as you can adjust for smaller rooms and dial it down. The highest setting is too loud and annoying, medium is just a shade louder than a normal furnace when it’s blowing at a high speed. I set mine just below medium and it blends In with the furnace so you can’t really notice it. I scoured reviews before buying this, I hope this is useful to someone.
A**M
Quiet motor but loud wind noise
So I tried the hon&gaun, ac infinity raxial s6 and ac infinity cloud line pro s6. The hon&gaun definetly moved the most air for the money but it was the only one that I could here the motor running both standing next to it and at the end of the vent over 20 feet away even running only 40%. But even at 40% it still moved a lot of air and there was not too much turbulence so the air noise was minimal but motor noise was loud. I really don’t recommend this unless it is somewhere we’re the noise doesn’t matter. The ac infinity raxial was the opposite, a bit more money, moves far less air, the motor is silent but the lousy impeller creates a lot of turbulence creating a lot of air noise that is mainly heard at the end of the vent. Last was the ac infinity cloudline pro, it’s far more expensive but far superior, moves lots of air, motor can’t be heard even standing right next to it and the air flow is smooth and quiet. It also offers optional WiFi controller that is very easy to use, can control up to 4 fans which can be controlled by your phone, by set speed, schedule, atmospheric pressure readings, temperature or humidity. This allows you to put the probe in a vent and have the fan only run when ac, heat or humidifier are running.
R**E
The product was exactly what the ad presented, size, colour, easy to install, etc. Installed it a couple days ago, was great! Quiet, speed adjustment....and today it just quit. Not sure if it iver heated or what...no burned wires or smell...nothing...just stopped working! I will be returning it and expecting a complete refund! Disappointed! **UPDATE ** After contacting AC Infinity, who were super friendly and helpful saying tgey would ship me out a new fan but have a quality check before they sent it out. I thanked them for offering but I decided to go a different direction for what I had originally purchased the fan for. Long story short...I shipped the fan back to Amazon and received my refund in just over a week. I most likely will give the AC Infinity fan another go in the future!!😊
L**.
Plugged in, switched on, 3 seconds and smoke comes out from the fan. Completely dead, so far had to pay £30 to ship it back, waste of money and time, bad experience. Got a German's made, works great. Germany-USA 1-0
J**.
Exelente producto me dejo impresionado su funcionamiento y estética ampliamente recomendado
B**N
Great fan only issue is that it came with a US plug. I needed it to have a UK plug. So I had to buy and extra 240v to 110v converter at £25. But it’s a great fan. Using it to power my home made humidifier on my mushroom farm. If it was adapted for the uk I would buy more.
P**X
het toestel heeft GEEN 230 volt wat ik verwacht wanneer je in Belgie op de amazon.com.be koopt en door belgische dealer wordt geleverd. klein foutje .... retour is direct aanvaard: wacht op de terugbetaling ....
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