I am very new to all of this, but my Doctor, the one who had me tested and went over the results etc, prescribed a CPAP with a heated unit. Apparently he does prescribe these units a lot according to the Instructor we had to show us how to use our CPAP
The Instructor mentioned the dry throats, noses etc. I believe the Doctor has learned to avoid a lot of problems for his patients by simply prescribing a CPAP with a heated unit from the start.
It was in the instructions and the Instructor made it clear to us ONLY USE DISTILLED WATER.