Protec antimicrobially treated to help inhibit the growth and migration of mold?? algae and bacteria on the filter</br>Optimized Filter Design maximizes moisture output</br>Filter captures minerals and pollutants from water & helps prevent white dust</br>Fits Models HCM-6009?? HCM-6011i?? HCM-6011WW?? HCM-6012i HEV680 and HCM-6013i</br>Change your filter if it is hard and crusty?? it develops an odor or moisture output is decreased</br></br>Product Description</br></br>Use with cool moisture evaporative humidifiers. Honeywell evaporative humidifiers are designed around the replacement filter to optimize performance and output. For best results?? use only genuine Honeywell filters for.</br><br/>http://www.amazon.com/gp/product/B000AO1G72