Professional Grade Products HV6 High Velocity Duct Booster Inline Fan, 220 CFM, 6"

quiet operations, seems sturdy....definitely increased air flow. I installed two at the end of my AC run!

I purchased this fan about a month ago and it worked fine to ventilate my utility room. However, after operating just a few times, it failed to come on. It's not working at all now. It measures as an open circuit when checked with a DMM. When it was working, it ran quietly and moved a good amount of air.

OK, so it took several days before I got an email that said it shipped. OK no biggy.I guess I didn't see anything that stated that this has a plastic fan, but it does and I'm not sure I like that. However, it is a six inch fan is a lot quieter than the other one I have, that's a plus. It's just an intake for my grow tent, my artichokes need the extra air, so I'll run it.It does work and is constructed well.

These fans never make it a year. This one came close 11 months 24/7 operation. I don't know if I should expect more but I do.EDITI ordered another fan because this one started making noise, usually indicated they are about to fail. However I got out the data vac and blew the fan out, no longer making noise and still running.

One of the 19th century American poets said "the more he talked about his honor, the faster we counted our spoons." Avoid products that advertise their quality in the name of the company. A cheap plastic fan in a flimsy metal tube. Fan mounting is flexible, mine came pre-bent so the fan rubbed on the duct. I fear if a gnat flew in it might shatter the fan blade... It does blow air, but at any pressure differential it is likely rated 220 Cubic Feet per Millenium.

So far this has worked perfectly. Composite blades make a huge difference compared to thin metal. Very quiet as well. Worth the extra few bucks compared to other cheaper alternatives.

It died after approx 2 months of 12 hrs /day use. Very disappointing.

Excellent works perfectly