If you can smell what people are cooking from the hallway, something may be wrong.

Balancing filter efficiency with energy efficiency and fresh air circulation is a tradeoff.

Leakage of 12,824 CFM was causing multiple problems which sealing the leaks solved.

The loose wire and puddle on the floor don’t know – or care – about your mask or vaccine.

Main point: Controlling air leakage is good for controlling disease spread as well as for energy savings.