
Mainstays 0.31 Gallon Ultrasonic Cool Mist Humidifier with Aroma and Nightlight
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Price facts
- Last seen at $19.42 at Walmart on Nov 15.
Our take on the Mainstays 0.31 Gallon Ultrasonic Cool Mist Humidifier with Aroma and Nightlight
The Mainstays Ultrasonic Cool Mist Humidifier is a small personal humidifier with a 0.31-gallon tank, a built-in nightlight and an aroma option. It runs up to 15 hours on low mist and covers rooms up to 219 sq ft, so it suits a bedroom, desk or small office rather than an open living space. Against larger ultrasonic rivals it trades tank size and runtime for a light, compact body that fits on a nightstand. Owners rate it well overall, though the small tank means frequent refills and the mist output is modest.
- Compact and light at 1.32 lb, easy to move between rooms
- Up to 15 hours of runtime on the low setting
- Built-in nightlight for nighttime use
- Aroma option adds scent to the mist
- Simple ultrasonic cool mist design with no filters to buy
Mainstays 0.31 Gallon Ultrasonic Cool Mist Humidifier with Aroma and Nightlight prices at every store
- WalmartNew
Out of stock
$19.42Checked 13 h ago
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Mainstays 0.31 Gallon Ultrasonic Cool Mist Humidifier with Aroma and Nightlight price history
Lowest price we've seen: $19.42 on Nov 15 at Walmart. Tracked across 1 store since Nov 15.
What reviewers say
- 4.3 / 5854 ratings
Owners of this Mainstays humidifier generally rate it well, calling it a good small unit for bedrooms and desks. Complaints center on the small tank and the need to refill often.
- Tank sizeCriticisedOwners say the small tank empties fast and needs refilling often.
- NoisePraised
Questions and answers
- How long does the tank last?
- The 0.31-gallon tank runs up to 15 hours on the low mist setting with cool water. Runtime is shorter on higher settings and varies with your home's humidity.
- What size room is it for?
- It covers up to 219 sq ft, so it suits a bedroom, desk area or small office. It is not meant for large open rooms.
- Does it have an auto shutoff?
- The listed features do not mention an automatic shutoff or humidity sensor. Plan to check the water level yourself.
- Can I use essential oils in it?
- It has a built-in aroma feature for adding scent to the mist. Follow the manufacturer's guidance on what to add and how much.
- Is it quiet enough for a bedroom?
- It is an ultrasonic cool mist unit, and owners commonly describe it as quiet at night. It is a reasonable choice for a bedside table.
- What comes in the box?
- The humidifier unit itself is the core item. Check the package contents for any included aroma pads or accessories before buying.
- What do buyers say about the Mainstays 0.31 Gallon Ultrasonic Cool Mist Humidifier with Aroma and Nightlight?
- Rated 4.3 out of 5 from 854 ratings.



















