HolmesHarmony Air Purifier Replacement Carbon Filter

Carbon filters greatly improve your air purifier's performance in removing unpleasant odors. For best performance, change the carbon filter approximately every three months (actual filter lifetime may depend how heavily it is used): 4 pack - Genuine Holmes carbon filter. Model HAP675 takes 4 filters. Model HAP650 takes 3 filters. Model HAP625 takes 2 filters. Model HAP615 takes 1 filter.