Replacement wick filters for Hunter humidifier model 33201 can be purchased at HumidifierFilters.com, FiltersUSA.com, Amazon.com and iAllergy.com. Filters fitting the model 33201 humidifier include Hunter filter numbers 31952 and 31941, both of which also may be identified as part number 94124.
Some retailers list replacement filters under the seller's part number instead of the Hunter part number. Most replacement filters from these websites are sold in packages of two, although iAllergy.com and several sellers on Amazon.com sell individual filters. The model 33201 humidifier requires two filters for correct operation, as do similar models of Hunter humidifiers. The replacement filters fit several other Hunter humidifier models, including 33202, 33204 and 33222.
Hunter branded filters are made in the United States and feature an antimicrobial agent to block the growth of bacteria, mildew and mold.
For humidifier owners in areas with hard water, filters with white mineral build-up may be cleaned instead of replaced. Filters can be cleaned by soaking for 20 minutes in a solution of 8 ounces of undiluted white vinegar and 1 gallon of water. After soaking, filters should be rinsed multiple times in water and drip dried before being returned to the humidifier. The frequency of cleaning, and the time between filter replacements, varies depending on water quality.