Is the Dreo 747S worth it at $99.97?

At $99.97 at Amazon as of November 4, 2026, it is a strong value for a 700 ft² humidifier with an 11 L tank and app control. Comparable large-room models often cost more.

How often do I need to refill it?

Dreo claims up to 100 hours on low output, so a full tank can last several nights. Expect much shorter runtime on high, closer to a day or two.

Does it work with Alexa and Google Assistant?

Yes. Dreo lists app, remote, touch and voice control, so it works with the major voice assistants through the Dreo app.

Will it leave white dust?

Ultrasonic humidifiers can leave white dust if you use hard tap water. Use distilled or filtered water, or a demineralization cartridge, to reduce it.

The box contains the humidifier, a remote control, a user manual and a quick start guide. The aroma box is built into the unit.

Large humidifiers usually drop during pre-winter sales and Prime Day events. Check the price history before buying outside those windows.

Where is the Smart Humidifier 747S cheapest?

At Amazon, for $99.97, as of our latest check.

Where can I buy the Smart Humidifier 747S?

2 stores we checked sell it, including DREO, Amazon.

Dreo

Smart Humidifier 747S

Best price now

$99.97at AmazonObserved at 8:25 PM

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Our take on the Smart Humidifier 747S

The Dreo 747S is a large-room ultrasonic cool-mist humidifier with an 11 L (2.9-gallon) top-fill tank. Dreo rates it for rooms up to 700 ft² and up to 100 hours of runtime on low, with a built-in humidistat, sleep mode, 12-hour timer, aroma box and RGB light. It is controlled by touch panel, remote, app and voice assistants. At $99.97 at Amazon as of November 4, 2026, it sits at the low end of its recent price range, with only two stores pricing it new.