Air Innovations MH-509 Ultrasonic Cool Mist Humidifier

Air Innovations MH-509 Ultrasonic Cool Mist Humidifier is rated 4.4 out of 5 by 25.
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Special Price $59.99 Regular Price $69.99
In stock
SKU
HUMID16-WHT
  • Works for rooms up to 400 SQ FT
  • 1.4-gallon water tank with 70 hour run time
  • Ultrasonic cool mist room humidifier
  • Includes permanent ceramic filter that never needs replaced
  • Programmable digital timer
  • Measures 9.75” W x 6.5” D x 13.5” H

Smart Humidifier

The Air Innovations MH509 ultrasonic, cool mist, Smart Humidifier™ is one of the top rated, longest running, and most versatile room humidifiers available for its size. Key features are a 1.4-gallon tank that runs for a full 70 hours on low (almost 9 nights of sleep without refilling) and is completely silent when running. Powerful enough to add humidity to large rooms up to 400 sq. ft., with a programmable built in humidistat that monitors and maintains the humidity level you set.

Convenient Features

It also has a built-in handle on the top and bottom of the tank for easy carrying, an extra wide opening for easy filling, as well as a fully programmable timer to turn it on and off when you want it to. There is even an auto safety shut off and audio beep to alert you when it runs out of water. Great for kids and babies, this cool mist humidifier also rehydrates your skin, relieves dry eyes, scratchy throats, post nasal drip and helps reduce snoring so you sleep better. As a bonus, it also rehydrates wood furniture, cabinets, wood floors and wooden guitars.

Low Maintenance

The tank and base are infused with an antimicrobial inhibitor to help prevent microbial growth on the surface of the tank and base. Unlike competing humidifiers, it also features a 360-degree rotating mist nozzle which helps direct the moisture where you want it. The Air Innovations MH509 Ultrasonic Cool Mist Humidifier also include a 1-year warranty from date of purchase.

Rated 4 out of 5 by from Opportunity for improvment We were fairly happy with this product and used it every day last winter. I especially liked the timer feature. However there is a flaw in design- when we packed it away for the summer the nozzle came off and went on to live a mysterious life some where else. This renders the products completely useless and dysfunctional. To me this is very poor design and can be fixed easily because a critical part can easily be designed to fit such that doesn't fall off. This is especially true if the product use requires you to turn it upside down for refilling. I can bet you there are many nozzle less humidifiers sitting in attics.
Date published: 2017-12-05
Rated 3 out of 5 by from Disappointing Performance Although this humidifier is rated for a 400 square foot room, it barely increases the percentage of humidity in a closed 200 square foot room even when run on high for 8 hours. The built-in humidistat is also very inaccurate. Although you can set the humidifier to turn off when desired humidity is reached, this humidifier never performed well enough to attain the desired 40%. I did end up purchasing a separate humidistat, so I could better measure humidity. What registered on it was always far different than what registered on the MH509. Positive points: easy to fill and very quiet.
Date published: 2018-02-08
Rated 3 out of 5 by from Humidifier great! Service not so much... I bought 2 humidifiers about a year ago. About 6 weeks ago I was having problems with one of them and emailed customer service. the problem righted itself however I never heard back from customer service.
Date published: 2018-02-08
Rated 1 out of 5 by from Terrible I bought this model so I would be able to tell the relative humidity percentage in the room and it just sticks at 31% no matter what
Date published: 2019-02-12
Rated 5 out of 5 by from Invest in Your Health We use our humidifier every night and we notice a huge improvement in how we feel when we wake up in the morning.
Date published: 2018-02-18
Rated 5 out of 5 by from Mist Humidifier The only problem with this humidifier is some white particles seem to get on my furniture and glass unit.
Date published: 2018-02-17
Rated 5 out of 5 by from Must have in winter months This is my second on! Very efficient and does a great job! Goes for 48+ hours per filling!
Date published: 2018-02-18
Rated 5 out of 5 by from Great Purchase will buy another soon This is the humidifier I have ever purchased. Easy to use, straight forward design and refilling the water tank is an easy 1 step process. I keep this unit at my office as the floor I work in keeps the AC running constantly and now that it's winter the entire building has become extremely dry. This has made a world of difference in just 2 days since I installed it.
Date published: 2015-12-10
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