My portables are a little noisy, but I still carry them everywhere I go take them to church restaurants anywhere I want to go I’ve gone to concerts Don’t seem to bother anybody nobody ever says anything anyway, I don’t care I have to breathe. I have a right to be out just like they do. And I’m not saying this to be mean, it’s just the truth we all have just as much rights being out.♥️

I purchased a refurbished gs 100 for a trip so that I could have oxygen overnight hooked to my cpap. I thought it was fairly quiet and much easier to move than my home machine. I used it with a long cannula to move around the hotel room also. It is a size that I could lift and I am not too strong. As Covid was ending I think there were extra oxygen machines and it turned out to be cheaper to buy than to rent for a week. I have an Inogen g 3 for a portable unit.

I have the new inogen . My ins. Medicare paid for it . The one before that was also an inogen but an older version and didn’t wor right . I had some complications so the Apria ,my oxygen co. Got me this one . I don’t understand what your talking about for noise on the portable so I guess mine is quiet. My floor concentrator I know how loud they can be I complained and said look I know they come much more quiet so please find one and low and behold they
Had one on the truck next day.. I have had so many problems with them in past I’m glad my company hand,es it ! I don’t understand why so many people have trouble getting one . I did t have that experience .

I've mostly had the noisy everFlo because I get it from the Oxygen supply company. I use Lincare for my in home and bottles supply. I now have a Stratus 5 in home really quite and works well and I have set on 4 lpm. When I was on private insurance it paid pretty decent for these. and now that I'm on SS my medicare and Part G Supplement pay 100% less my annual deductible. I use Lincare because they were the close by available when I started and are nationwide so if I travel and have a problem I can go to any local office to get help or replacement or refill bottles. I also keep 3 25' lengths of hoe on mine. They tell you not to do more than 2 lengths but I' don't have any problem doing the 3 or (75 feet) of hose. and a 7 ft canula. Just make sure your insurance will take care of you. Better than buying them as they can quit on an instant. I have had about 6 machines in the last 10 years.

I have the Inogen continuous flow as a travel machine. I cannot speak to reliability as I have used it just a few days at a time. I keep it in a box when not at use so I can load it in the trunk. It weighs 18 lbs but seemed easier to load. It was quiet to me but I have some hearing loss and have a very noisy machine at home. I am happy with it. I bought a refurbished model from a medical supply. So far it is great. I have my portable in case of emergency.