Breathing is so natural to life that we often take it for granted until Northern California wildfires fill it with smoke and ash. In many areas of California including the San Francisco Bay Area, Oakland, and the East Bay, improving indoor air quality is now getting a lot of attention as the wildfire smoke invaded our homes. This is in addition to the continuing problems of vehicular pollution and smog, mold, and heating and ventilation problems common to older homes. And, fresh air inside our homes has already been getting more attention than ever due to the restrictions of COVID-19. With so many people working inside their homes they are more than ever concerned about how healthy air is around them.