Personal opinion. CFM may be lacking. But worth the quiet operation.

This fan is as quiet as advertised.

Great unit

Runs at a low speed

Works well

I use mine in a grow tent. A bit pricey for what it is. Speed control is very handy. Fan is not perfectly balanced as it shakes a bit, depending on speed (just like a car tyre), so I have to avoid some speed ranges. Front and rear openings are long enough to adequately attach a hose & clamp, unlike a few others I looked at.

Effective and shows no issues with continuous use after 4-5 months, so far

Fairly quiet and has had no issues with continuous use.

Great Product For Laser Ingravers / Cuters

Easy to use, easy to install

Not as quiet as I was lead to believe.

I used mine in an old trailer for ventilation. Works descent but not as quiet as I thought i would be. Descent quality but not UL or SE approved (so how can Amazon legally sell it?). Hums a little when you run it in the low range. It's ok for what I am using it for but I was hoping for better. It is (almost) all plastic - no surprise there, after all it is from China.

Quiet

So far so good let’s see how long it lasts if I get on year great but it’s built really good from my visual aspect.

Good but wish wire was longer.

Good fan. Only complaint: wire should be longer.

Great for Cooling AV Racks

The 4 inch inlet and exhaust are the same size as standard dryer vents, and dryer ducting. I used my cooling fan to suck out the hot air from a home audio / video rack, and dump it out thru a dryer vent. Seems to work well, it's a little loud, but it really works quite well. Very reliable too.

Fan

Great durable product

Excellent

Just hooked it up with a 4" carbon filter and it is keeping my 5x4x2 at 59% w/ passive intake (2 plants). Probably could've stepped up to a 6" but this thing is so quiet, quieter than my 500W led w/ fan.

Excellent

Just hooked it up with a 4" carbon filter and it is keeping my 5x4x2 at 59% w/ passive intake (2 plants). Probably could've stepped up to a 6" but this thing is so quiet, quieter than my 500W led w/ fan.Update 1/19/19: I keep this on the lowest speed and it keeps the tent between 40% and 58% humidity (if after watering). Runs great, nice and quiet. Works perfectly even pulling through a carbon filter. Real great setup and game changer in terms of airflow.

A little power house.

I use it to clear the smell in the small storage room up stair. Man this motor can move air. It is a little loud but not too bad. I would buy it again.

Five Stars

great quality for the price

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Using it to boost the air in a bedroom so that it will finally get some heat. Usually we have to use a space heat in the bedroom but because of the fan we haven't needed it. It has been working great since I installed it a month ago. I used a temp sensor, sold separately, so that it only turns on when the furnace kicks on. hopefully I can get many years out of it.

Easy to install and works great

I used it on my air duct lines for a oil hot air furnace works great I might need a couple more

Good strong

Nice strong and quite really moves the air

Quality

Seems to be a quality product. Mine has been running for 6 solid months now, with no down time. I use this to force air into an electronics equipment box for cooling. So it runs 24x7. Working great so far. I did pair it with an automotive air filter (4") to clean the air coming in, so I'm sure that's helping.

Best fan.

I use this for my Crypto mining shop, and have had great luck. This fan keeps the airflow going smoothly. I'll definitely recommend this to a friend.

Suprisingly powerful

Nice build quality. Used this on a cooktop downdraft installation, moves quite a bit of air. I have have it mounted under the floor in the basement and there is no vibration. The motor is really quite you just hear the massive amount of air moving.