This pack of 4 humidifier wick replacement filters was designed and manufactured by FilterBuy to replace MD1-0001, MD1-0002, MD1-1002 Humidifier Wick Filter.
These filters are designed to be used in all Evaporative humidifiers, including model numbers 221, 232, 421, 432 and HU1-0021.
Note that this is an aftermarket replacement humidifier wick filter manufactured specifically by FilterBuy for high quality allergen protection. Any humidifier manufacturer brand name is used solely for the purpose of demonstrating compatibility.
