DIY Box Fan Filter & Air Quality Experiment Here in San Francisco and surrounding areas kids are stuck indoors during this smoke wave caused by our wild fires with little or no air filtration. In San Francisco the school buildings are older and are not setup to have building wide air filtration. Nor can cash-strapped

Which Portable Air Filters for Allergies are Right for Me? Are you suffering from allergies?  Did you recently remodel your home and are bothered by noxious odors? Wondering which air filters for allergies are right for your home or office? Maybe you want to take preventative action against possible indoor airborne pollutants in the form

How HVAC Systems Help Reduce Potential COVID-19 Exposure: As the economy begins to reopen and we return to our buildings, what role do building ventilation systems play in reducing our risks of infection? Infection via inhalation or contact with droplets is well understood at this point. Another potential exposure route being discussed is exposure via