Super cheap DIY air filter to deal with the wildfire smoke.

Smoke from the Canadian wildfires has gotten really bad this year. Luckily, there’s a cheap and readily available way to filter the air in your house.

airnow.gov reported air quality in our area has been getting pretty bad, heading above 260 for PM2.5

Pandemic Research to the Rescue

During the pandemic, Engineers Richard Corsi and Jim Rosenthal created a filter design based on cheap 20 inch box fans and common HEPA household air filters…