Hon&Guan 4 Inch Inline Booster Duct Fan with Speed Controller - 130 CFM Airflow with 6W Ultra-Low Power and Low Noise

So far this fan works great. Using it to vent out cat litter smell and so far it is working like a charm. I like the variable speed control, works perfect. Has a hum to it but I wouldn't say it is loud. I have this fan in the laundry room venting the cat litter box. Well, it worked a little to good and was venting warm air from the house. Not the whole house but any room connected to the laundry room. So it does have some power to it.

I bought this to ventilate a small paint booth I had thrown together while working on restoring some old car parts. This fan is very quiet, smooth, and pushes a lot of air. It's compact yet powerful, and the adjustment allows me to raise the speed when spray painting to get rid of overspray, and slow things down to let the paint off-gas/cure quicker. The fan has held up against a lot of spray paint being sucked right into it and has no issues. It works as I intended, and the included clamps are a bonus.

This inline booster fan worked great for my fog machine at Halloween! It comes nicely packaged up and protected and sets up in under a minute. I have a custom-built fog-chiller that pushes out a TON of fog. Over the years, I noticed that the fog doesn't make it far enough into my graveyard scene so this year I added this little item. My setup involves a fog machine, a fog chillder, 6 feet of dryer duct hose and this booster duct fan. My fog machine feeds directly into the fog chiller which cools the fog and keeps it lying low to the ground. The dryer duct hose is connected on the opposite (exit) end of the fog chiller where the cooled fog exits. The variable speed booster duct fan is on the other end of the dryer duct hose to draw the chilled fog out and disperse it. The variable speed switch is great for adjusting the speed of the fan to get the right volume of fog to disperse. The only caveat is that the fog residue builds up on the fan blades, which is easily remedied by cleaning them after using it with a fog machine. I highly recommend this item for use with a fog machine. (DISCLAIMER: The diagram provided below was generated with ChatGPT and is for illustrative purposes only of where the booster fan is placed in my fog chiller setup. The drawing is not to scale and is not a proper representation of the size/shape/design of the Booster Duct Fan with Speed Controller.)

Bought this to create a knockoff bed jet and it works great. This thing can move air and isn’t that loud when a window ac going and air purifier. It makes about the same noise. Great price out and very easy to setup. I really like the controllable speed. Does a great job cooling. I like the all black look. I would recommend this product.

very cool easy to install on my small dryer. The vent duct goes from the kitchen to Kansas so we needed a little encouragement to move the moisture on down the line. The cord is long, that was good. It's pretty quiet and fits in 4" standard dryer ducting.

I bought this to use as an exhaust fan on my cats automatic litter box. The 1st one has been on for almost one year, straight it NEVER gets shut off. Ive ran it between 20% and 40%. The only reason I bought a second one is because about a month ago it started making a humming sound and I HATE the smell of clean or dirty cat litter. The 1st one is still running strong. If you need a 4 inch fan thats gonna work, all the time lol buy it.

Decent working and quiet. Just way too small for a 4x4 tent. It'll circulate the air. Slowly. Doesn't help much expelling heat because it's too slow. I couldn't imagine turning the speed down at all. Will have to upgrade

Its been a great little fan....I have been running it nonstop since February of 2025...its not very loud at all...I use it for 3D printing

This unit worked well. At 75% and up it starts getting noisy. It spin so fast and it cuts my finger. Please be aware of no safety guard, so watch your finger!

I'm writing because these units so far have worked incredibly well. I own three different models,..and a total of 14 units. I have 3 three of these 8 inch "Booster" models,..I am using these to clear the air where i live. Both intake air and out. Very powerful fumes are emitted by the upper tenants,..(This is Canada ) These units have been "Generally" going 24/7 at one speed or another, and even next to open windows all year round. I live in Milton, Ontario,..and we have many humid summer days, and Canadian winters,...more recently,.i accidently dropped one of these units, and it hit a pointed corner bathroom vanity top at the fan blade and broke the fan blade. i immediately contacted HON & GUAN at one of their email addresses,..explaining i had damaged the unit and would like to pay for replacement parts and/ repairs,...they asked me to email my Order # (Amazon) and WOW!,..WOW! again,..HON & GUAN were SO KIND,....THEY SENT ME A REPLACEMENT "FREE OF CHARGE" AND ALSO SENT ME AN ADDITIONAL 4 INCH MODEL AS WELL..WOW!,..WHAT A COMPANY.

Good for its job and price

exhaust powe Good

Works good the speed controll is a good one it is a bit noisy tho