Duux Air Purifier

It's a very simple air purifier based on the Duux filter.
https://duux.com/en/product/2-in-1-hepa-activated-carbon-filter-for-sphere/

Used with an 92mm PC fan.

True HEPA+Activated Carbon filter for 99,97% removal efficiency.

The double-layer 2-in-1 HEPA + activated carbon filter for the Sphere Air Purifier (DUAP01 / DUAP02) removes dust particles, odours and other harmful substances from the air such as fine dust (PM2.5, PM0.3, PM0.1), smog, pollen, cigarette smoke, viruses, bacteria, benzene and formaldehyde. The true HEPA filter removes up to 99.97% of all airborne harmful dust particles up to 0.3 microns in size. Filter lifespan: 4500 hours (depending on usage and air quality).