Sprry this is a bit long. Well, I have had some issues with my cpap in that I wake up with a scratchy throat. So, I tried using only the dry option ith no humidity and it seemed to help but then I questioned whether this waa a good idea for my emphysema. Seemed logical to ask the pulmonologist whaich is better, humid or dry air. He respnded through hus nurse that he would defer to the sleep study folks. Um, so I asked them and got a noncommittal answer regarding my “comfort” level. Anyone have an answer?