Replacement gas and odor filter standard for use with the Airgle PurePal Clean Room AG900 air purifiers. This 6 lb gas and odor filter features an enhanced blend of premium granular Activated carbon. Provides excellent absorption of VOCs as well as common household odors and chemicals. Replace as needed. We recommend checking the filter for cleaning (by vacuuming) or replacement every 2-3 months. Replace at least every 6-12 months depending on use and air pollution levels. Airgle Replacement Filter #AF900C.