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Store SKU #1001361461

1.4 Gal. Cool Mist Digital Humidifier for Large Rooms Up To 400 sq. ft.

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  • Permanent ceramic filter never needs to be replaced
  • Anti-microbial tank & base - helps prevent bacteria growth
  • Cool mist humidifier runs up to 70 hours on one tank
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Product Overview

The Air Innovations model 509 ultrasonic, cool mist, smart humidifier is one of the top rated, longest running, and most versatile humidifiers available for its size. Key Features: 1.4 gallon tank that runs for a full 70 hours on low (almost 9 nights of sleep) 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. The entire unit and base are made of antimicrobial plastic to prevent bacteria, mold, and mildew growth and it comes with a permanent ceramic filter to help trap impurities in your water. Unlike Vicks, Crane and Essic humidifiers, it also features a 360-degree rotating mist nozzle that helps direct the moisture where you want it.
  • Runs up to 70 hours on low setting
  • Digital LED display
  • 5.2 l capacity water tank
  • Automatic safety shut off turns the unit off when the tank is empty, preventing the motor from burning out
  • Freshen your space with pure, clean moisture with the Air Innovations 1.4 Gal. clean mist smart humidifier
  • Designed to operate quietly for uninterrupted sleep
  • Removes impurities and puts clean, pure moisture back into the air
  • For rooms up to 400 sq. ft.
  • 4 mist settings: Low, Medium, High, Supreme
  • Permanent ceramic filter - It never needs to be replaced
  • Rotating mist nozzle
  • Adjustable humidistat
  • 1 - 24 hour timer
  • 1.4 Gal. capacity
  • Anti-microbial plastic - helps prevent bacteria growth
  • 1-year limited manufacturer's warranty

  • Click here for more information on Electronic Recycling Programs

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Customer Reviews

  • 4.3
    out of 395 reviews
  • 84%recommend this product
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Showing 1-10 of 395 reviews
Works well but eventually gets noisy
This unit is excellent for creating humidity in the air. All the features such as humidity level, timers, work well. Only complaint is the noise after about 1 year of use. Noise seems to be coming from the blower which pushes the mist up the tube and out of top of unit. I opened it up to investigate and cleaned the blower which helped a little but its still louder than when it was new.
Response from Air Innovations TeamMay 12, 2020
Thanks for choosing Air Innovations. We appreciate your review. Your humidifier shouldn't get louder with age. The Air Innovations Customer Care Department can absolutely help you troubleshoot this problem. Contact air-innovations.com and select the chat feature in bottom-right corner of the screen. Thanks! airinnovations
    • Recommended
    1 found this review helpful
    It is an attractive unit. It is very quiet and does the job of keeping the room comfortable. Yo...
    It is an attractive unit. It is very quiet and does the job of keeping the room comfortable. You can set a timer or humidity level and the unit will turn itself off and on according to your settings. It's not the easiest to refill. The top is curved and needs to be filled from the bottom. If you're filling from a faucet you need to stand and hold the unit to keep it from tipping until it's full. The little white directional misting thing on the top needs to be removed before filling otherwise it will fall off and roll under the sofa. Overall I'm happy and comfortable in my warm and adequately humidified home.
      • Recommended
      1 found this review helpful
      Living in Arizona the air is extremely dry, sleeping at night with this unit on is a delight. The...
      Living in Arizona the air is extremely dry, sleeping at night with this unit on is a delight. The unit is quiet, practically silent and has many different easy to understand settings. it has a 1.5 gallon capacity and depending on settings you can get multiple nights of use without having to refill the unit. There are timer functions and settings for humidity degree, as well as the ability to turn off the display, I prefer to sleep in a dark room and this was a big plus for me. overall I give this unit 5 star rating and highly recommend it.
      • Verified Purchase
      • Recommended
      2 found this review helpful
      Awesome product! I will be buying more of these....
      Awesome product! I will be buying more of these.
      • Verified Purchase
      1 found this review helpful
      The output mist control is a great feature, the humidity control is great as well. Do not like l...
      The output mist control is a great feature, the humidity control is great as well. Do not like like that the container does not have a handle on the outside of the main unit so that you can remove it from the base easily. There is a handle on the underside of the container but trying to put the unit back onto the base is difficult if your hands are wet.
      • Verified Purchase
      5 found this review helpful
      Right out of the box this does not function properly. Humidity says it is still at 31 after runni...
      Right out of the box this does not function properly. Humidity says it is still at 31 after running on the highest setting for several hours. The unit looks nice and has some good features, but they are useless if they do not work. If I wanted something that ran continuously, there were cheaper options availabe.
        6 found this review helpful
        There is nothing innovative about this except may be the looks. My comparison is mainly with the ...
        There is nothing innovative about this except may be the looks. My comparison is mainly with the Crane 8065 ultrasonic humidifier. I gave it 3 stars as it does not have a continuously adjustable knob for humidity, humistat is not accurate so timer is useless, does not turn off immediately, will not remember the humidity setting when turned on (with unit still plugged). 1) With medium setting it only runs for 3 nights (9-10 hr each). The 70 hours claim is for low setting. But at this setting the unit hardly puts out any moisture. So I am not surprised if it gives 70hrs. It is pointless to run this at low setting. For me the medium is a bit too much as I see condensation on the window the next morning. I would prefer a continuously adjustable knobs as with the Crane 8065. 2) It is not as quiet as other rave about. Compared to the Crane 8065 out of the box, this is louder. But the Crane 8065 started making a loud grinding sound after a couple of months. The general complaint in all these humidifiers is that the unit becomes loud after some use. It is obviously due to cheap parts made in China. Will see if this also gets louder. Now it is not very bothersome as it is not totally a high pitch whining sound. It is like a mixture of high pitch and low pitch fan white noise. High pitch content is less. 3) This unit is probably made by the same manufacturer but sold as a different brand as the black nebulizer looks the same as Crane and the molding of the base and top also look similar. If you shopped for jackets at Macy's or Kohls you will see that they all look the same but with a different brand name. So I will not be surprised if the humidifier parts are all made by the just one or two manufacturers in China. 4) The on/off button does not turn off the unit immediately. It runs the fan for 10mins and then turns off. Makes no sense as this is not a heater to cool off before shutting down. I found this out only after I buying a second unit as I thought the first one was defective. 5) The humidistat is useless as it is not accurate. How do I know? Because when I put the 2 units side by side, one read 35% and the other read 41%. Also it read 35% all night. So even if I had used the auto-off feature and set the humidity at a higher value, it would have run all night. These features are useless if the humidity cant be measured accurately and reliably. 6) Every time I turn off and turn on, it defaults to the low setting. So I have to set it to medium again. Where as with the Crane, it is a mechanical switch with a continuously adjustable humidistat knob (but no display). I like that feature as I plug the unit to a timer to turn on at 8pm and go off at 5am. Just look at it once in 2-3 days to refill. I cant do that with the MH-509 7) Using distilled water every day is going to be expensive as you are not supposed to use tap water. The demineralization cartridges are like $9 a piece. Dont know how long they will last. Those for the Crane 8065 last for some 30-40 days. If the Crane 8065 had not gotten louder, I would have given that 5 starts and bought more of them. Time will tell if the Air Innovations MH509 will get louder. They are all cheap stuff made in China and made to last just for the warranty period They know this is seasonal and people only use it for a few months. In all probability the next season it will be out of warranty period. BTW Amazon took the Crane 8065 out, most likely due to all the negative reviews. Since MH509 is mainly a QVC product it is not very popular in Amazon. It is also not selling as hot cakes in Homedepot in spite of displaying these models right in the main walkway.
          7 found this review helpful
          I owned this for two weeks and it worked fine and was helpful. My cat was entranced by it, sittin...
          I owned this for two weeks and it worked fine and was helpful. My cat was entranced by it, sitting for hours watching the steam and jumping at the bubbles and then knocked it over and the tank cracked badly. Not cat proof.
            • Recommended
            7 found this review helpful
            Great digital programmableIt humidifier!
            I have another brand of room humidifier in my living room but this one has it beat! The digital controls and features are great and easy to use. The controls allow you to adjust the mist output, maintain a desired humidity level, and to set the unit to turn on or off in 1-24 hr increments. It will run continuously for up to 70 hrs on low setting. It is extremely quiet and compact so it is perfect for the bedroom. The Humidistat monitors your humidity setting. It also includes a 4 level adjustable mist output. It uses Ultrasonic Technology and has a permanent ceramic filter that helps eliminate hard water deposits and other impurities. If you live in a dusty area and/or have allergies/sinus problems, a humidifier significantly reduces those problems and this is a great one to use in small or large rooms.
            • Recommended
            10 found this review helpful
            Many Features At A Great Price
            The set up was very easy. When you fill it with water which needs to be spring or distilled water from a bottle you need to remove the top half and unscrew the ceramic bead holder filter then add the water. I would have liked to see a fill line but there isn't one. The digital display is great and the unit can be set to start or end in hour increments. The humidity can also be set as well as the amount of mist that is needed. We have noticed that the air quality is better while we sleep and we don't wake up with sore throats. The display can also be turned of if the light bothers you.
            • Recommended
            13 found this review helpful
            Showing 1-10 of 395 reviews