Peer-reviewed and fully documented design for air cleaning and ventilation, which incorporates a box fan with MERV-13 furnace filters to capture particulate and biological material from the air. Project link includes Spanish instructions. A basic Corsi Cube can easily be built for under $100 USD.
If using 3DP corners, always use tape to seal the horizontal (fan side) and vertical (air filter) edges to avoid filtration performance loss.
