New here but not new to CPAP therapy.
Bit of history and a question ....
Diagnosed with OSA like 10-12 years ago. I had an S8 that I used for 4 or 5 years that I was very compliant with but the mask I was using broke and was discontinued. I tried quite a few others and couldn't get comfortable so I finally gave up.
I recently got a Fitbit 4 activity tracker with the pulse oximeter and saw in the sleep tracking that I was getting low oxygen readings sometimes in the high 70's at night with an average of 92.
Saw my GP and explained and got a referral to a sleep doc. He said I need to get back on a machine. Recommended an Airsense 10 or Mini. I trolled the local For Sale pages and yesterday picked up a brand new / unused Air Curve with heated hose for $400 Canadian. Young guys mom passed away before she could use it

Questions:
I'm not sure how to get into the menu for clinician setup and wonder if I should use CPAP only mode or do it in BIPAP. Will it really make a difference in how the machine runs if I only need CPAP but set it up for BIPAP?
Thanks!