If you are tired of having to fill your humidifier with water every day, the Vornado EVAP40 humidifiers is a simply designed evaporative humidifier that holds 4 gallons of water which means less filling and more humidity. We recommend this for larger common areas since it has an area capacity of about 1,000 square feet. On the lower speeds, the EVAP40 can be refereed to as whisper quiet operation. The humidifier is easy to clean and the water tanks are spill-proof with easy lift handles for comfortably transporting to the faucet.