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  • Easy fill technology makes filling as simple as watering a plant
  • No costly filters to replace
  • Adjustable humidity control for maximum comfort
  • Quietly emits soothing moisture in less than 1 minute
  • Auto shut off when humidifier tank is empty
  • Medicine cup for use with liquid inhalants
  • Easy to clean with dishwasher safe parts
  • Recommended for large rooms (20' x 20')
The Honeywell Easy to Care Warm Mist Humidifier is the definitive solution to combating dry air in a swift and efficient manner. Intuitive design and practical application have completely eliminated the requirement of ever purchasing replacement filters for this unit. This is achieved through a highly resourceful system that utilizes boiling water to purify the surrounding air. The overall process is a relatively quiet one that effectively eliminates up to 95% of airborne bacteria in the water while simultaneously emitting warm and purified moisture into your surrounding area. Capable of holding 1.3 gallons of water, the Honeywell Easy to Care Warm Mist Humidifier can effectively operate for 24 continuous hours on one filling. Easy Fill Technology allows for an easily accessible means of keeping your unit operating at full capacity. Simply pour water into the Filling Area and you're ready to go. Convenient additions such as an Auto-Shutoff feature, dishwater friendly pieces and the ability to select and personalize the level of Humidity through an adjustable dial further distinguish this model as a premier option. Honeywell has assured peace of mind by including a 3 year limited warranty with the purchase of this product.
What parts are dishwasher safe?
The float, mist dome, mist chimney and top cover are top rack dishwasher safe.
What setting should I put my humidifier on?
It is recommended that you set your output to high. Once you are at a more comfortable humidity you can turn your output setting to low or set your humidistat.
I ran my humidifier overnight in a very dry room and the humidity barely changed but my water level decreased quite a bit.
It may take a few days for your humidity to increase. Wood, rugs and other objects in your room will absorb moisture before you can feel the effects if it is extremely dry.
The refill light is on. I've turned the humidifier off, unplugged it, waited 15 minutes and refilled it.
You may need to clean your humidifier. There could be an excessive build up of minerals on the heating element.
How much water does my humidifier hold?
Your humidifier can hold up to 1.3 Gallons (4.9 L) of water. It can be filled to the Max line.
How long will my humidifier run when full?
Your humidifier will run up to 10 hrs on high and 24 hrs on low.
Product Details
Product Specs
Product Manuals
Honeywell Easy to Care Warm Mist Humidifier - White, HWM-340W Video

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HWM-340W customer reviews

Overall Rating

17 Reviews
17 customers recommend this product
Honeywell Easy to Care Warm Mist Humidifier - White, HWM-340W Reviews
Sharon Baxter
November 14, 2018
Verified Purchase

This is the second one I have ordered, works very well with no issues.

Michael Brady
November 13, 2018
Verified Purchase
Protect review

This is the best warm mist humidifier I have ever used. Very easy to use and clean. Also, helps humidify the air in my home.

William Crocker
November 9, 2018
Verified Purchase
The best in so many ways!

It's small, simple, quiet, easy to clean, easy to fill, all but disappears in the room! Thanks Honeywell for such a great product! Bill

david smith
August 17, 2018
Verified Purchase

Works good

Deborah Hall
April 17, 2018
Simplest and best. Please keep offering this!

Bought one and then bought a second and a third. This is easy to fill and puts out a lot of warm vapor. No filters, nor dust, easy to clean. When we got our first one we had moderately hard water. An appalling amount of salts accumulated after a week of continuous running. Not too difficult to clean but prompted us to install a whole house water softener. We use potassium salt, no sodium. We now have two of these units running continuously in our 10 by 12 sunroom where I grow orchids. The ideal humidity level for humans is 45% to 50% and for orchids the same or higher. It takes two units in this small but open to other areas room to keep the humidity at 40-45%. I add water many times a day so it is very important to be able to fill the unit and not have to drag the tank to the kitchen. We feel better and the orchids are happier too. These must still be cleaned every week, and they do generate white noise which may or may not be to your liking. I have a third as backup in case one fails or Honeywell discontinues this model.

Ronald Pushka
January 17, 2018
Verified Purchase
Cold weather comfort

Cold outdoor air causes dry indoor air discomforts. A Honeywell warm mist humidifier assures indoor comfort. Thanks Honeywell.

Ronald Pushka
December 11, 2017
Verified Purchase
Quick to please

I ordered a white humidifier and received a black one. The response on the exchange was terrific. Honeywell sent a new unit before i had time to return the incorrect one. I was pleased with their speed.

Alan Wade
November 24, 2017
Verified Purchase
Easy to clean

Heating element can be entirely submerged in the white vinegar I use to clean it unlike the 330 model I've previously purchased.

April 20, 2017
Verified Purchase
Best ever!

This is the best humidifier I have ever owned-it puts out lots of warm mist and the inhalant cup is very convenient to use. Extremely happy with this purchase!

Rebecca  Ward
February 11, 2017
Verified Purchase
Buy One !

This is my second Honeywell Warm Air Humidifier so that tells you just about everything. I still have and use the first one I bought . No filters , quiet , much easier to fill . I use mine 24/7 during the dry winter months . I have tried other brands and found them inferior & expensive . Its hard to find this brand on store shelves so I shop on line . You cannot go wrong .

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