CPAP HEPA filter adapter

The filter on my CPAP is ineffective and I think essentially useless. Because I have allergies I wanted to change it to a HEPA filter so I made an adapter. It might work better and seal better if I glued it in place but I travel with my CPAP and so didn’t want to do that. The only permanent part is the 3 hooks glued on.

On the longer legs I used one of my favored materials, a bent paper clip to hook in. String or rubber band would work too. A rubber band on the other side puts tension on the legs to ensure a seal. I like to build without support so the adapter is 2 parts glued together (the extra tube to hold the hose). The attachment hooks have unsupported overhang that my printer was able to handle.

I have short pieces of hose left over from old masks that I use to attach it to the box with the HEPA filter.

I also wanted to change the angle of the input so I made an elbow (4125993) which is also posted here. https://www.thingiverse.com/search?q=4125993&dwh=425e2bd61eaba4a