CPAP hose dryer

CPAP 22mm tubing hose dryer

with this 80mm high CFM and high pressure fan
https://www.amazon.ca/dp/B09VDNGW8K/

I'm using the thinner layer of a COVID mask as a dust filter (1-ply)

Generic +12Vdc 1A power supply
plugged in a smart switch with auto_off (40 min timer)

** I had a lot of trouble getting good air pressure at the outlet. I tried several models of reducer, initially I wanted to put the filter at the entrance but it worked poorly. Currently, it is functional but not optimal. Maybe I'll revisit my drawing later or change the fan for a smaller one! to be continued ...