4 ms·

There is a cubic design that people have been doing with HEPA filters (4 sides and a cardboard bottom) that solves the airflow issue.

• azth 5y ago
  Do you have a source? Sounds interesting.
  • hammock 5y ago
    https://www.youtube.com/watch?v=Y7eL2OAnqc8 https://www.youtube.com/watch?v=Y7eL2OAnqc8