Thanks for your help. But, can you explain what you mean when you say: “how long has it been since you got down to the events per night”? Are you referring to the sleep apnea events per hour? when I was on the CPP machine , I never got below 12 per hour, but in a few months on the BiPap machine I am down to a normal 2-3 events per hour. but still tired all day long.