Adam in Suzhou sent me a picture of a creative solution to a filter problem.
The fan he had at his house had an opening that was slightly larger than the HEPA. So Adam cut out a piece of cardboard to close up the edges. Great idea!
Adam says, “It’s already turned slightly gray after one night!
芝加哥大学行为科学系的助理教授; Smart Air创始书呆子。