I use this at 10 lt for 15 min for cluster headaches. It stops the headache before it starts as long as I can connect the few minutes before the headache starts. The bad bad part is the sound, I measured it at 78 dB at six feet, advertises 58? Must be from 30 ft or located on another room!!!! If you can imangine having a headaches and adding this noise to them!! Would not recommend this! For people needing oxygen to sleep you would have to place this in another room.
Review by Wayne on 7/26/2017
I think mine is louder than 58 decibels and I it is too loud for me.
Review by KD on 1/12/2015
Does the job!
It's loud and it can run a little hot but it does the job and if you need up to 10 L it works great.
Review by Christie on 12/21/2014
Every 5 seconds this makes the loudest banging noise when it purges.
Review by David Meek on 4/17/2014
Louder than noisy!
I've had this thing for a week now. It is loud, in fact, I own a large commercial air compressor that doesn't make any more noise than this thing does.
Review by Timmy on 12/13/2013
This is not my favorite home concentrator, it can be noisy and blasts hot air.