Combat dry, stuffy indoor air with the Holmes Cool Mist Humidifier. Improve the air-quality in your home and protect your family from the effects of damaging, dry air - especially during the harsh winter months. This humidifier uses water filtration to help remove impurities in the water. The humidifier is treated with an anti-microbial agent to inhibit the growth of mold, mildew and odor-causing bacteria. The AccuSet Digital Comfort Control automatically monitors and maintains your ideal humidity comfort zone. The 16 hour programmable timer automatically turns the humidifier on and off. The FilterCheck filter monitor indicates when a replacement filter is needed. The large tank is easy to fill and carry and runs up to 48 hours. 16 hour timer, 1.5 gallon tank capacity, 4 comfort settings, Ideal for medium-large rooms, Quiet operation, Uses replacement filter.