Does the SU-2020 shut off automatically?

Yes. It stops when the water level gets too low, so the ultrasonic element does not run dry.

Will it leave white dust?

With hard tap water, likely yes. Ultrasonic units throw minerals into the air. Use distilled or filtered water to reduce it.

The 2-gallon tank is large for a compact unit. On low output it can run well over a day; on high it empties much faster.

No. You set output with a dial and turn it off yourself. A separate hygrometer helps if you want to hold a target level.

It works best in a bedroom, office or small living room. For a large open space, expect to run it on high and refill often.

The humidifier, its water tank and base, and a manual. No filter or demineralization cartridge is included.

At The Home Depot, for $56.99, as of our latest check.

4 stores we checked sell it, including The Home Depot, Lowe's, Sylvane, Best Buy.

$56.99at The Home DepotChecked 14 h ago

Compared across 4 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

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