FilterBuy Replacement Humidifier Wick Filter Compatible with HWF64 Holmes, Sunbeam & Bionaire. Fit Units requiring Filter B. HWF64 Holmes, Sunbeam, & Bionaire Humidifier Replacement Filter. Aftermarket replacement filter manufactured by FilterBuy. Fits Holmes, Bionaire, and Sunbeam units requiring filter type B. This humidifier filter is designed to prevent growth and migration of mold, fungus, algae, and bacteria. Premium aftermarket replacement, designed by FilterBuy in the USA. Humidifier FilterBuy: Breathe Better!