How to make indoor air safer from wildfire smoke and coronavirus

Air purifiers and filters are a hot commodity these days. A lot of the top-recommended models are sold out pretty much everywhere. And it’s not just the recent fires and terrible air quality in California that’s driving sales.

As more evidence confirms that the coronavirus is spread primarily through the air, there’s a new rush to make indoor air spaces safer, which could necessitate big-ticket overhauls of ventilation systems.



  • Jeffrey Siegel - Professor of Civil Engineering at the University of Toronto