Start with a filter attached to a box fan and consider making a Corsi-Rosenthal box. This kind of makeshift air cleaner was in use for wildfire smoke mitigation before the COVID-19 pandemic. If the ...

Southern California wildfires have spurred smoke advisories by authorities and contributed to hazardous air quality ...

Filters with higher values can catch smaller contaminants like smoke, bacteria and viruses ... All you need is a box fan, good air filters and some duct tape, and you're in business.

They can be pretty pricey, but if you're feeling crafty, try making a DIY box fan air filter for wildfire smoke — these are amazingly effective if properly taped together. Sponsor Message ...

Start with a filter attached to a box fan and consider making a Corsi-Rosenthal box. This kind of makeshift air cleaner was in use for wildfire smoke mitigation before the COVID-19 pandemic.