DAVID F.
Machine works good
Machine works good. In hot weather it can have some issues if the temperature outside is over 100 degrees F. I have not used it when it has been 20 below but I think it might have problems at that temperature. Both temperatures exceed its recommended operating range for ambient temperature. I have two machines. Not having a backup is not acceptable. I alternate each machine each day and they both perform good. Its best feature is the ability to use it on commercial airline flights. I extended the shoulder strap and added a waist strap. That has made the machine much more confortable to use. I spend 6-8 hours each day doing outside lawn and garden work. Not much has changed from the days when I did not need supplemental oxygen. It has been a good investment in lifestyle.



