The Honeywell HAC-700 Replacement Filter B is an ideal replacement for the Honeywell HCM-750 series of humidifiers. Genuine Honeywell Filters assist in capturing minerals and pollutants from water while helping in the prevention of white dust. Filter material is reinforced for maximum efficiency and a longer lifespan. The addition of Protec Antibacterial Treatment decreases the amount of growth and migration of mold, fungus, algae and bacteria in the filter. Ensure a premier and hospitable breathing environment for yourself and your loved ones with a Genuine Honeywell Filter.