Unlike the other air purifiers which are designed to be fixed, Eteria has been created to be portable and light, so that it can be moved in every room of the house. Furthermore, Eteria has a ceramic filter that does not need any replacement.
The majority of the air purifiers out there are made with HEPA filters which have to be changed periodically. Also, small pollutants can escape to these kinds of filters, and mold and bacteria can grow on them. All these downsides make the purification less effective.