iPower 10 Inch 862 CFM Inline Duct Ventilation Fan HVAC Exhaust Blower for Grow Tent, Grounded Power Cord

A quiet beast

I seriously don't doubt the CFM ratings for this whatsoever. It's a bit loud on high, but this is easy to fix (it's completely dependent on the ducting. No sound comes through the casing.And it's definitely a solid machine. YES it leaks a bit of air around the sheet metal connection between the front and the back, but it's pretty sturdy (and heavy). TBH though, I'm amazed my unit still works and barely any vibration...I've dropped it or it came loose and fell 5 feet and rolled another 3 feet more than once. Mine is 6" and is just awkward to hold and mount. And I put a single layer of gorilla tape or clear duct tape (not packing tape!) Around the 2 flanges. As they're only about an inch long.but semi rigid aluminum tube stays fine with a clamp. And definitely don't use anything less smooth like flexible ducting tube on the intake (see below). 12" and the blower sounded like it was really going, but it was barely moving 1/3 of what it's rated...The mount is nothing to write home about and it's good enough to mount on bungee cords hanging from a 12" L-Bracket right to a stud (it definitely vibrates on different speeds. (Get a $5 controller from Amazon. My first one wouldn't get hot running a shop vac and the second was a 4-pack for $11). And don't go below 1/2 speed (by airflow).BTW I did my research on this type of blower and you're not supposed to slow it down with basically a glorified light dimmer, but the intake restriction is how you would tweak the volume under varying loads, etc. If you block the output, it will ramp up the power to try and compensate... But very slight changes to the input really change the output while it remains at more or less constant speed. So put a grille obviously and you want something for a muffler (1 or 2 sizes larger tubing with coarse wire mesh in the correct diameter and polyester pillow fill between the rigid outside and the mesh tube, so I did 7" with a 1/2" mesh and 10 or 12" (or 2 home depot buckets long, but one might do it. Look at commercial duct silencers online for restaurants, etc and you'll get an idea what's needed physically for components.HTH

Looking for a little plastic fan to move a little air around?Nah this thing could kill the family dog as it absolutely pumps air in or out of the room, fast enough to notice it at every doorway.While it's a little noisy (and I mean just a little, it is well optimized), it is purely because of the sound of the air rushing through this thing. The motor makes the gentlest of hums that could barely be heard, but nearby it you can hear the air really rushing around. I have a couple in the basement of my house by where I do wash, and I may end up replacing the 10 feet leading up to and from it with insulated ducting just to try to cut down on the sound a little, but in the room a few feet from it (not insulated yet), i can just barely hear it. In fact I more hear the sound of the air rushing through the flex tube in the ceiling more then the fan it's self.Worth noting a mistake was made and one ended up being in direct weather for about 2 years straight and still functioned.Any time I get a duct fan, it is and will be one of these (in various sizes).The most recent one is being used to vent out a server room with 1 almost full rack, and a 12 is being used to keep a computer room about the size of a living room cool.

I got this to replace and underpowered kitchen stove exhaust fan. This certainly has the power and sucks the fumes, steam etc. up out of the cooking area. The only problem is that it is a capacitor start motor and I can find no way to vary the speed. Therefore, it always runs full speed. Mine is mounted outside of the house 10 feet from the stove hood, but is still quite noisy when running which you wouldn't mind if you have a lot of smoke or fumes to suck out in a hurry but my wife would like to have a couple of speeds so you don't have to try to talk over the noise if someone else is in the kitchen while you are using it.