Hunter 31941 Humidifier Wick Filter (Aftermarket) Hunter Humidifier Replacement Filter Fits Hunter furnace humidifier models 33201, 33202, and 33222. Hunter humidifier wick filter (evaporator pad) 1 pack. Measures approximately 4 5/8" x 6 1/8" x 1 5/8". Honeycomb filtration to trap mineral pollutants found in water and help prevent them from entering your home. This is an aftermarket filter.