The Resmed C pap machine had problems with the dehumidifier from the first night I used it. They replaced the machine. The second c pap machine did the same even when set at a lower level. I was told to return the machine because of an insurance billing problem the cellular data showed low usage on my part. The data also showed that there was actually problems with both c pap machines. Returning the machine as requested by Lincare staff became a problem for me because the serial number on the return paper work did not match and I would not sigh until it was done properly. I asked for proof on paper with a letter head on it that the first machine was returned three weeks prior and swapped out for another machine. Keep in mind that a Resmed C Pap machine sells for $1,100.00. (google to confirm) not even to mention what the company considers to be the rental value to them.There has to be a mark up in value. I was there for like an hour. Which turned unpleasant for my self and two staff members. I did leave with two copies of the proper paper work to use as proof of my returning both machines. The serial number came up right so I signed the papers. I would tell you as a client of any medical equipment supplier check that paper before you sign because every thing you sign applies to a contact between yourself and that company. Protect yourself from future financial loses.