@sueinmn I have 02 at home but rarely use it because it doesn't really help with shortness of breath. I only ended up with O2 because I had Covid and spent 1 night therr for them to make sure my lungs had not been damaged anymore. They never suggested for me to be on 02 but one of the nurses just said if I was interested in getting O2 at home, told me who to call. My pulmonologist never mentioned getting on 02. The 6 minute walk i have done several times indicates my level does not drop below 93 even though I'm panting like crazy while walking.