Decathlon Easybreath 500 mask adapter for HME filters

thingiverse

These adapters connect HME filters with universal ISO 5356 connectors, 22M/15F, 22F/15M, to Decathlon Easybreath 500 snorkeling masks. This is not certified protection equipment; use it "as is." Certified equipment is available if you need it. The models may not look perfect because I prioritized functionality over aesthetics during the rapid prototyping process due to COVID-19 constraints. A brief test confirmed that the system is sealed, but no extensive usage testing was performed since the adapter was created for someone else's benefit. Initially, one filter adapter model was designed; however, feedback indicated difficulty breathing through the mask when using it. Consequently, a second adapter model accommodating two filters was developed. David1978's model was bypassed because its connector spacing appears insufficient for 70 mm diameter HME filters. The adapters were printed with PLA material. Although flexible materials might provide better sealing performance, I chose to use what I'm most familiar with; the mask features an O-ring seal, which seems sufficient. These models are modified remixes of David1978's Easybreath 500 mask connector and HME filter connector designs from thingiverse.com/thing:4261352 under the applicable license.