Deposition velocity Activated carbon

Air cleaning off e ex carb energy Depart ability of HVAC systems. Conventional strategies for reducing levels of indoor air pollution can be classified into three broad categories: source reduction, dilu-tion by ventilation, and active engineered control systems (in HVAC systems or as stand-alone air purifiers). Ventilation has a substantial outdoors or from indoor sources. Two passive removal materials (PRMs)were selected for study, activated carbon (AC) andunpainted gypsum wallboard (GWB). These materials have relatively high reactivity with ozone and should produce few byproducts [2–4]. Laboratory chamber and test house experiments were completed to determine ozone deposition velocities to AC and GWB over a wide range of air flowconditions. The relative effectiveness of using PRMs to reduce occupant exposures to ozone was then estimated using a mass balance model on a well-mixed residential home