December 12th, 2017
Popular indoor air purifiers can sometimes emit dangerous levels of ozone, a lung-damaging pollutant, a UC Irvine chemistry professor says. Some purifiers can create the indoor equivalent of a Stage Two smog alert. The findings, similar to those in recent studies by the stateAir Resources Board, suggest that the popular devices could be a significant source of indoor air pollution. The worst of them, when used in a small, poorly ventilated room, could produce as much as three times the ozone levels recommended for outdoor exposure by state and federal air quality agencies.