Standard Features - Humidify Automatically - Powered to run when your heating and cooling system cycles - High Output - Delivers up to 18 gallons of moisture into the air each day - Simple Maintenance - Replacement Honeywell Humidifier pads can be purchased from and/or replaced by your heating and cooling contractor, and also fit Aprilaire Humidifiers - Exclusive AgION Humidifier Pads - Feature an anti-microbial coating which helps inhibit the growth of micro-organisms - PerfectFLO Distribution Tray - Helps ensure that moisture is distributed evently - Model Number: HE365A - 5-Year Warranty