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The PureGuardian H940Ar is a small ultrasonic cool-mist humidifier with a 0.5-gallon tank and a built-in aromatherapy tray. It runs quietly, shuts off automatically when the water runs out, and suits a bedroom, nursery or desk where space is tight. Against larger console humidifiers it covers less area and needs refilling more often, but it is easier to move and clean. Owners of small-room ultrasonic units like this one tend to value the quiet mist and the option to add essential oils.
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Lowest price we've seen: $37.99 on Nov 11 at Quill. Tracked across 1 store since Nov 11.
Owners of small ultrasonic humidifiers like this one generally like the quiet mist and the aromatherapy option. Common complaints are short run time per fill and white dust from hard water.
