The HoMedics TotalComfort Ultrasonic Humidifier (model FY20P36) offers both warm and cool mist options, using ultrasonic technology to convert water into a whisper-quiet, micro-fine mist for comfortable whole-room humidification. It features dual top-fill water tanks with a total capacity of 2 gallons (7.57 liters), providing 12 to 120 hours of runtime depending on settings.

The digital control panel includes a programmable humidistat adjustable from 35% to 55% relative humidity in 5% increments, five mist output levels, a 360-degree rotating mist nozzle, a programmable 12-hour auto-off timer, and a night-light with independent controls. Warm mist mode heats the water to produce a warm vapor (requires approximately 20 minutes to reach temperature). A Sleep mode turns off the display lights while keeping the unit running. An integrated aroma tray accommodates essential oils for added aromatherapy; oils should only be placed on the provided pads, never directly in the water.

The unit includes two demineralization cartridges (compatible replacement model UHE-HDC4) to reduce white dust caused by hard water minerals. Auto-shutoff activates when tanks run dry. A CLEAN indicator illuminates after 120 hours of use as a maintenance reminder; the transducer should be cleaned periodically with a 50/50 white vinegar and water solution. Backed by a 2-year limited warranty from HoMedics.