New Comfort NEW Charcoal Anti-Odor Filter 3500/3000 Air Purifiers Brand New Replacement Charcoal Filter made by New Comfort for 3500 / 3000 Model Air Purifiers. Will only fit the New Comfort 3500 / 3000 models purchased from June 2012 and later, this will not fit any modles before June 2012. Charcoal filters are proven to safely filter odors from the air without the use of harmful ozone filtration used in many other air purifiers.