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The PureGuardian H5225 is a 2-gallon ultrasonic humidifier that puts out either cool or warm mist and is rated for rooms up to 560 sq. ft. Its top-fill tank is easy to refill and clean, and it adds a night light, a 3-speed mist control, an 8-hour timer and an aromatherapy tray for essential oils. The headline claim is up to 100 hours of runtime, but that figure only holds on the lowest mist speed and depends on room conditions. It suits people who want long unattended runs in a bedroom or open living space and like the option of warm mist; rivals in this class often skip warm mist or the oil tray, but few match the claimed runtime without a large tank.
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The PureGuardian H5225 is a top fill ultrasonic humidifier that produces cool or warm mist. It is made for medium and large rooms up to 560 sq. ft. The ultrasonic technology is ultra-quiet, so it can run while you sleep.
The 2-gallon tank fills from the top, which makes it easy to fill and clean, and the unit has a small footprint. It runs up to 100 hours on the low mist setting, and run time also depends on atmospheric conditions. A low water indicator light shows when the tank needs a refill.
It has 3-speed mist control, an 8-hour timer and a night light that can be turned on or off. An optional aromatherapy tray holds a pad for a few drops of essential oil. Add oils only to the included pad, never to the water tank, because oils can damage the humidifier and void the warranty.
