Need to dry your CPAP hose after cleaning?  This should help.

This design uses a spare 70mm 12vdc CPU cooling fan to pull air through your 22mm CPAP hose to speed up drying your hose.  A larger fan (80mm) might be used although it would need to be mounted on top of the enclosure as it does get tight inside.

Includes a 6mm square hole for mounting a power connector, or to feed power into the fan.  Does not include mounting holes as the fan used was an oddball size.  End cap is a friction fit.

Created using Fusion 360, and printed with Overture PLA on an Ender 3 V2.  Used CHEP's 0.28 Extra Fast profile to print, and tree supports for the tube connection and fan opening.

Let me know what you like, don't like, and any makes or remakes.  Thanks!

Update 5/20/23 - Uploaded the Fusion 360 files per request.