FilterBuy Replacement Humidifier Filters for AC-813 Duracraft. Compatible with Duracraft Humidifier models DH830, DH832, HC832. Pack of 2. AC-813 Duracraft Humidifier Wick Filter. Aftermarket replacement filter manufactured by AFB. Pack of 2 filters. Designed to fit Duracraft Humidifier models DH830, DH832, HC832. This humidifier filter is designed to prevent growth and migration of mold, fungus, algae, and bacteria. Premium aftermarket replacement, designed by AFB in the USA. AirFilterBuy: Breathe Better!