I purchased the Invacare Perfecto2 Oxygen concentrator in March, 2022, received it April 25,2022, as a second unit to keep in our camper. My husband took it out of the box upon receipt. It was not damaged in shipping and appeared to be fine. I did not turn the unit on or use it until 3 months later when we took a trip in our camper. The first time I turned it on it started a short beep followed by a long pause, followed by a short beep at about the 30 minute mark. It continued this way until about the 1 hour mark when it changed to a long, loud beep, which signals you must turn the unit off immediately. I used it for an hour at a time like this for the duration of our trip.
When we returned home I contacted the retailer, Health Products for You, and also Invacare directly. Invacare says they have a 3 year warranty but what they don't say is that it is for PARTS ONLY! I was told I would have to pay shipping to the repair facility in Texas, pay the labor to replace the parts, and pay to have it shipped back to me. The shipping one way is going to be over 100.00, and God only knows how much labor they'll charge me - on a unit that was defective right out of the box and shows 16 hours of usage. I asked for a call tag, and was told they don't provide them. At this point I'd be happy to return this defective unit for a refund and wash my hands of it, but I'm sure they'd want me to pay to ship it back to them as well. Invacare may have been good in the past but they no longer are. Don't make the same mistake I did - order another brand from another retailer besides Health Products for You.