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Honeywell HWM845 Warm Mist Humidifier with Essential Oil Cup Filter Free Black: Quiet Operation, 24-Hour Run Time, ETL Listed - 2 of 4Honeywell HWM845 Warm Mist Humidifier with Essential Oil Cup Filter Free Black: Quiet Operation, 24-Hour Run Time, ETL Listed - 3 of 4Honeywell HWM845 Warm Mist Humidifier with Essential Oil Cup Filter Free Black: Quiet Operation, 24-Hour Run Time, ETL Listed - 4 of 4
Honeywell HWM845 Warm Mist Humidifier with Essential Oil Cup Filter Free Black: Quiet Operation, 24-Hour Run Time, ETL Listed - 1 of 4

$35.99

In Stock

Eligible for registries and wish lists

At a glance

About this item

Highlights

  • Filter free relief from dry air discomfort
  • Wide tank opening for easy fill and clean
  • Essential oil cup- allows for your favorite essential oil or liquid inhalant to be added
  • 2 comfort settings with auto shut-off, when tank is empty
  • Reset light lets you know when water is low

Description

This Honeywell Warm Mist humidifier delivers a soothing warm mist to provide relief from dry air discomforts. Quiet, filter-free operation allows long-lasting use without the costs of replacing a filter. It has a 1 Gallon tank that runs for up to 24 hours without needing to refill it. Essential oil feature allows use with your favorite essential oils or with liquid inhalants. Essential oils sold separately.
Dimensions (Overall): 11.8 Inches (H) x 10.6 Inches (W) x 6.4 Inches (D)
Weight: 4 Pounds
Features: Automatic Shut-Off, Aromatherapy Option, 2 Power Levels, Refill Indicator, Water Level Window, Quiet Operation, Medicine Cup
Misting Type: Warm Mist
Capacity (Volume): 1 Gallon
Moisture Output: 2 Gallon
Number of Settings: 2
Includes: Owner's Manual
Filter Type: No Filter Needed
Industry or Government Certifications: ETL Listed
Room Size Range: Range Not Specified
Run Time per Fill: 24 Hours
Volts Required: 120 Volts
Power Source: Electric
Battery: No Battery Used
Warranty: 3 Year Limited Warranty. To obtain a copy of the manufacturer's or supplier's warranty for this item prior to purchasing the item, please call Target Guest Services at 1-800-591-3869
TCIN: 53618815
UPC: 328785001334
Item Number (DPCI): 085-18-0036
Origin: Imported
Energy Guide Label Not Required:
ENERGYGUIDE LABEL NOT REQUIRED
If the item details aren’t accurate or complete, we want to know about it.

Shipping details

Estimated ship dimensions: 12 inches length x 7.6 inches width x 13 inches height
Estimated ship weight: 5.14 pounds

Return details

This item can be returned to any Target store or Target.com.
This item must be returned within 90 days of the date it was purchased in store, shipped, delivered by a Shipt shopper, or made ready for pickup.
See the return policy for complete information.

Q: 2 Years ago someone some stated that a "plastic" smell was emitted from this humidifier. Does this unit, now in 2022, still emit a bad smell when running?

submitted by BJGA4 - 4 years ago
  • A: Thank you for your inquiry. Occasionally, new units can have a "plastic" smell from the plastic that the units come wrapped in. If you place the humidifier into a well ventilated area for a few hours, this will allow the smell to dissipate. If you have any other questions please do not hesitate to contact our consumer relations team by emailing us at SocialSupport@helenoftroy.com. Thank you.

    submitted byManufacturer Tech Support - 4 years ago
    Brand expert
  • A: mine had it for a few cycles then stopped . It wasnt terrible, obviously not pleasant but not a deal breaker . I dont like to smell chemicals but for the limited time it did it i felt like it was ok

    submitted bytb - 3 years ago
  • A: I don’t smell anything, and I’m pretty sensitive to smells

    submitted byM - 2 months ago
  • A: I just received my unit yesterday and can confirm that it does have an absolutely terrible stench. It was so bad that my roommate down the hall started yelling in disgust and asking what that smell was. I took it outside today and ran it on high for a couple hours but that did not help. I just put it back outside to run for longer, if I remember I will come back with an update.

    submitted byRyan - 4 years ago

Q: I just bought one of these today. When I started running it, the humidifier put a "plastic like" smell into the room. Will it continue to do this or is this something that should go away with continued use?

submitted by PS - 6 years ago
  • A: Thank you for your inquiry. Sometimes a new unit can have a plastic smell from the packaging. We would advise airing the unit out for a few hours in a well ventilated area and this should get rid of the smell. If you have any other questions please do not hesitate to contact our consumer relations team by emailing us at SocialSupport@HelenofTroy.com. Thank you.

    submitted byManufacturer Tech Support - 6 years ago
    Brand expert
  • A: Mine has continued to emit the smell, which is no doubt toxic, and I would recommend against purchasing this humidifier. They told me to run it for 12 to 24 hours straight on high power, which I had already done (I've had it a little more than a week) but did so again, and it didn't clear up the problem as they said it would. Absolutely unacceptable and probably dangerous to your health.

    submitted byWillE - 5 years ago
  • A: I wish I would have read these before I purchased it. I have been running mine for weeks now and the horrible chemical plastic stench will not go away. It angers me to see the reply about it being the plastic that it is wrapped in and don't want anyone to be fooled by it. The smell is coming from the unit itself and it's obvious. I took it apart and washed it and it did nothing. I'm very angry as I've always bought Honeywell and now I have to find a new humidifier brand.

    submitted bySassy9609 - 4 years ago

Q: When I look up this humidifier on the Honeywell site, it says it’s compatible with use of the protec cleaning balls. But a tech support person answered someone else’s question below saying they were not compatible. Which is it?

submitted by VLM - 1 year ago
  • A: Thank you for your inquiry! The Protec cleaning cartridge is designed for use with cool mist humidifiers, so it is not a recommended accessory for the Honeywell HWM845 Warm Mist Humidifier. We apologize for any confusion this may have caused. For further assistance, please feel free to contact us at SocialSupport@helenoftroy.com. We're here to help!

    submitted byManufacturer Tech Support - 1 year ago
    Brand expert

Q: how hot does the humidifier get

submitted by COOL guy - 3 years ago
  • A: Thank you for your inquiry. The heating element gets got enough to boil water. However, the plastic is made to transmit heat poorly, meaning the unit will not get very hot. However, it will still be very warm while running and we do not advise trying to move the unit while it is running and to let it sit for at least 15 minutes once it is turned off before moving it. If you have any other questions, please do not hesitate to contact our consumer relations team by emailing us at SocialSupport@helenoftroy.com. Thank you.

    submitted byManufacturer Tech Support - 3 years ago
    Brand expert
  • A: I've noticed my humidifier boils if I put on the highest setting and is HOT. Is this normal or should I always set it in low.

    submitted byErin A - 4 months ago

Q: What is the size of the tank?

submitted by Me - 4 years ago
  • A: This tank is a little bit smaller than one gallon. It is maybe 9/10 of a gallon. I tried 3 times to fill it from a one gallon bottle of water, and 1 gallon of water never fit in this tank.

    submitted bydn - 4 years ago
  • A: Thank you for your inquiry. This humidifier holds 1 gallon in the water tank. If you have any other questions please do not hesitate to contact our consumer relations team by emailing us at SocialSupport@helenoftroy.com. Thank you.

    submitted byManufacturer Tech Support - 4 years ago
    Brand expert

Q: what type of water do you use

submitted by region - 5 years ago
  • A: Thank you for your inquiry. You can use regular tap water with this unit. You can also use, or mix in, distilled water to reduce the mineral content of the water. If you have any other questions please do not hesitate to contact our consumer relations team by emailing us at SocialSupport@helenoftroy.com. Thank you.

    submitted byManufacturer Tech Support - 5 years ago
    Brand expert
  • A: If you use distilled water, it will not work at all. It BOILS the water and it gets very hot, so my whole house smelled like chlorine. I loved this machine except for that, and returned it.

    submitted bydn - 4 years ago

Q: Can this be refilled from the top with a pitcher or do you have to pull off the whole container and turn upside down to fill it?

submitted by OurMedGuide - 7 years ago
  • A: Thank you for your inquiry. This is not a top fill model. You must remove the tank from the unit in order to fill it. We hope this is helpful. Please do not hesitate to contact us if you have any questions. We can be reached by emailing SocialSupport@kaz.com. Thank you.

    submitted byManufacturer Tech Support - 7 years ago
    Brand expert
  • A: You must pull it off and turn it upside down to fill it. However, it has a great built in handle, very large easy open cap, and holds less than 1 gallon of water. So I found it very easy to fill.

    submitted bydn - 4 years ago

Q: Is it cool mist also

submitted by Nancy - 26 days ago
  • A: Thank you for your inquiry. The Honeywell HWM845 Warm Mist Humidifier only produces warm mist. If you are looking for both a cool/warm mist humidifier, please contact us at SocialSupport@helenoftroy.com and we will be happy to assist you We're here to help!

    submitted byManufacturer Tech Support - 25 days ago
    Brand expert

Q: What size room does this humidifier best operate?

submitted by Dana - 30 days ago
  • A: Thank you for your inquiry. The Honeywell HWM845 Warm Mist Humidifier is ideal for medium-sized rooms, typically up to about 250–300 sq. ft. If you need more details, feel free to our team at SocialSupport@helenoftroy.com. We're here to help!

    submitted byManufacturer Tech Support - 27 days ago
    Brand expert

Q: Is this supposed to use an entire filled tank in one 8 hour night? I'm using the low setting and the tank is almost empty by the time I wake up

submitted by Abracadabra - 1 month ago
  • A: Thank you for your question. The Honeywell HWM845 Warm Mist Humidifier, is designed to provide up to 24 hours of runtime, but factors like room size, humidity level, and ventilation can affect water usage. We recommend checking that the unit is operating in a stable environment and reviewing the user manual for optimal settings. For personalized assistance, please reach out to us at SocialSupport@helenoftroy.com. We're happy to help!

    submitted byManufacturer Tech Support - 27 days ago
    Brand expert

Additional product information and recommendations

Guests are saying

The Honeywell Filter Free 1 Gallon Warm Mist Humidifier is a standout choice for enhancing indoor air quality. Guests appreciate its whisper-quiet operation, ease of use, and the ability to add essential oils for a soothing atmosphere. With a generous tank capacity that lasts through the night, this humidifier effectively combats dryness, making it ideal for bedrooms and small spaces. Its filter-free design simplifies maintenance, ensuring a hassle-free experience for guests.
    Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
    3.8 out of 5 stars with 954 reviews
    ease of use: 3.62 out of 5
    quality: 2.5 out of 5
    value: 2.67 out of 5
    32% would recommend
    240 recommendations
    5 out of 5 stars
    Thumbs up graphic, would recommend
    7 February, 2026Verified purchase

    (no review title)

    Great humidifier have another one just like it delivered on time and in perfect condition
    Douglas
    ease of use: 5 out of 5
    quality: 5 out of 5
    Did you find this review helpful?
    1 out of 5 stars
    Thumbs down graphic, would not recommend
    7 February, 2026Verified purchase

    (no review title)

    We couldn't figure out how to get the machine to work. The red button would not shut off.
    karyn
    ease of use: 1 out of 5
    Did you find this review helpful?
    1 out of 5 stars
    Thumbs down graphic, would not recommend
    26 January, 2026Verified purchase

    (no review title)

    Leaked in few days
    1 reply from Manufacturer Tech Support team - 13 days ago
    We’re so sorry to hear about the leaking issue and the difficulty you experienced with your humidifier. Thank you for bringing this to our attention. Please contact us our team at SocialSupport@helenoftroy.com so we can assist you with a resolution right away. We appreciate the opportunity to make this right.
    Hassan
    ease of use: 5 out of 5
    quality: 1 out of 5
    value: 1 out of 5
    Did you find this review helpful?
    1 out of 5 stars
    Thumbs down graphic, would not recommend
    23 January, 2026

    Burn risk

    The unit gets really hot. The mist is like the steam from a pot of boiling water. You will burn your hand if you touch the plastic where the steam comes out or the steam itself. Not safe for around children. If it tipped over it would cause serious burns.
    1 reply from Manufacturer Tech Support team - 13 days ago
    We’re very sorry to hear about your experience with the unit and understand how concerning excessive heat and steam can be. Safety is a top priority, and the behavior you described is not what we expect from this product. We would like to learn more and help resolve this issue as quickly as possible. Please reach out to our team at SocialSupport@helenoftroy.com for further assistance. We're here to help!
    Melissa
    Did you find this review helpful?
    2 out of 5 stars
    Thumbs down graphic, would not recommend
    19 January, 2026

    Leaks water, poor design

    There is a lot of condensation buildup underneath the tray which leaks through the holes in the bottom and onto whatever surface it is sitting on. Have to wipe it up and dry it off daily. A very poor design. I will be going with a cool mist humidifier instead.
    1 reply from Manufacturer Tech Support team - 13 days ago
    We’re so sorry to hear about the condensation leaking issue and the difficulty you experienced with your humidifier. Thank you for bringing this to our attention. Please contact us our team at SocialSupport@helenoftroy.com so we can assist you with a resolution right away. We appreciate the opportunity to make this right.
    Bryan
    ease of use: 4 out of 5
    quality: 2 out of 5
    value: 2 out of 5
    2 guests found this review helpful. Did you?
    5 out of 5 stars
    18 January, 2026
    originally posted on influenster.com
    Image

    What a great little machine !

    [This review was collected as part of a promotion.] Works really well. I like that it's big and that it's simple to use as well as the functions. It works really well. Very durable assembly and packaging is very simple. Seems very safe.great overall value.
    mskitkat09_581
    Did you find this review helpful?
    1 out of 5 stars
    Thumbs down graphic, would not recommend
    15 January, 2026Verified purchase

    Keep the box

    Worked two times. Had less than a week. I did smell a plastic odor when it did work but figured it would go away with time. Scale was more than any unit I have ever owned and certainly wouldn’t expect that much after two uses.
    1 reply from Manufacturer Tech Support team - 24 days ago
    We’re sorry to hear your experience with your warm mist humidifier and appreciate your feedback. We’d like to help troubleshoot and ensure your unit works properly. Please reach out to our team at SocialSupport@helenoftroy.com, and our team will assist you promptly. We're here to help!
    Do better
    ease of use: 1 out of 5
    quality: 1 out of 5
    value: 1 out of 5
    1 guest found this review helpful. Did you?
    5 out of 5 stars
    Thumbs up graphic, would recommend
    13 January, 2026Verified purchase

    (no review title)

    Excelent
    Aleyda
    ease of use: 5 out of 5
    quality: 5 out of 5
    value: 5 out of 5
    1 guest found this review helpful. Did you?
    5 out of 5 stars
    Thumbs up graphic, would recommend
    8 January, 2026

    great humidifier

    love the auto shut off and essential oil container. Use everytime I'm sick, I add the Vicks vapor steam to oil area feel great by morning.
    Donna
    ease of use: 5 out of 5
    quality: 5 out of 5
    value: 5 out of 5
    Did you find this review helpful?
    5 out of 5 stars
    7 January, 2026Verified purchase

    Honeywell HWM845

    Great humidifier. Works well. Highly recommend.
    SuPa
    Did you find this review helpful?
    3 out of 5 stars
    Thumbs down graphic, would not recommend
    30 December, 2025

    not that helpful

    helped a little with congestion not a lot. don’t like that you can’t control the way the mist comes out. i returned the item.
    joy
    ease of use: 3 out of 5
    quality: 3 out of 5
    value: 3 out of 5
    Did you find this review helpful?
    3 out of 5 stars
    Thumbs down graphic, would not recommend
    29 December, 2025

    Not the best

    I’ve had this a couple of winters now and it still gives off a putrid burning plastic smell. The base also gets very HOT so be careful what you set it on. Gets scaly pretty quickly too. Pros: quiet running and easy to refill, which you will need to do a lot.
    Ellie
    ease of use: 5 out of 5
    quality: 2 out of 5
    value: 2 out of 5
    Did you find this review helpful?
    2 out of 5 stars
    Thumbs down graphic, would not recommend
    21 December, 2025Verified purchase

    Doesn't last burned out in under a week

    Wouldn’t recommend I had it two days and it burned out and started leaking
    1 reply from Manufacturer Tech Support team - 2 months ago
    We’re truly sorry your Honeywell Humidifier stopped working properly and is leaking. That’s certainly not the reliability we expect from this model, and we understand how disappointing this must be. Please reach out to our team at SocialSupport@helenoftroy.com so we can help make this right. We're here to help!
    Samantha
    ease of use: 3 out of 5
    quality: 1 out of 5
    value: 1 out of 5
    2 guests found this review helpful. Did you?
    3 out of 5 stars
    Thumbs down graphic, would not recommend
    20 December, 2025Verified purchase

    short run time

    the 24 hour run time is way exaggerated. It doesn't even last 10 hours on high and about 15 hours on low.
    ab
    3 guests found this review helpful. Did you?
    1 out of 5 stars
    Thumbs down graphic, would not recommend
    20 December, 2025Verified purchase

    More of a vaporizer

    This item is basically a vaporizer, not a true humidifier. You fill the water container, and about four minutes later steam will start to come out. It’s not a true humidifier where it blows out. Also, the entire unit is plastic, which yields a plastic burning smell. Opted to return and buy something different.
    1 reply from Manufacturer Tech Support team - 2 months ago
    Thank you for sharing your experience with the unit. We’re sorry to hear it didn’t meet your expectations and that you noticed an unpleasant smell. Your feedback about the design and performance is valuable as we work to improve our products. Please reach out to us at SocialSupport@helenoftroy.com so we can assist you further and help find a solution that better fits your needs. We're here to help!
    runnerdude928
    ease of use: 2 out of 5
    quality: 1 out of 5
    value: 1 out of 5
    2 guests found this review helpful. Did you?
    1 out of 5 stars
    19 December, 2025Verified purchase

    (no review title)

    Worked for one night. Completely stopped working. Not producing steam
    1 reply from Manufacturer Tech Support team - 2 months ago
    We’re truly sorry your Honeywell humidifier stopped working properly. That’s certainly not the reliability we expect from this model, and we understand how disappointing this must be. Please reach out to us at SocialSupport@helenoftroy.com so we can help make this right.
    Cristina
    1 guest found this review helpful. Did you?
    1 out of 5 stars
    Thumbs down graphic, would not recommend
    19 December, 2025Verified purchase

    Heavy Scale after just 5 days!

    Used the humidifier as recommended and the amount of scale inside the parts was more than I’ve ever seen! Also, it’s too much soft plastic. My bedroom smelled like a chemicals for days. Will be going back!
    1 reply from Manufacturer Tech Support team - 2 months ago
    We’re sorry to hear about your experience with the humidifier, including the scale buildup and odor concerns. We appreciate your feedback and want to help address these issues. Please contact us at SocialSupport@helenoftroy.com so we can gather more details and assist you further. Thank you for bringing this to our attention. We're here to help!
    Christy E
    ease of use: 4 out of 5
    quality: 1 out of 5
    value: 2 out of 5
    3 guests found this review helpful. Did you?
    1 out of 5 stars
    Thumbs down graphic, would not recommend
    11 December, 2025Verified purchase

    Not worth the maintenance hassle!

    This filterless unit quickly accumulated heavy scale even though I used distilled water. After a week, I had to disassemble multiple parts and soak everything in vinegar, which is the manufacturer's recommendation. The cleaning process was tedious, especially when sick. Next season, I’ll choose a unit with a filter. This one is not worth the maintenance burden.
    1 reply from Manufacturer Tech Support team - 1 month ago
    We’re truly sorry to hear about the maintenance challenges with your Honeywell HWM845 Warm Mist Humidifier. We understand how inconvenient frequent cleaning can be. Your feedback is valuable as we work to improve ease of use in our products. Please contact our team at SocialSupport@helenoftroy.com so we can assist you further.
    RA
    ease of use: 1 out of 5
    quality: 2 out of 5
    value: 2 out of 5
    4 guests found this review helpful. Did you?
    2 out of 5 stars
    25 November, 2025Verified purchase

    Save yourself

    You can’t really clean it. A bit noisy but after I got used to don’t mind
    1 reply from Manufacturer Tech Support team - 2 months ago
    Thank you for sharing your experience with the product. We understand that cleaning challenges and noise can be frustrating, and we appreciate your patience in adapting to it. Your feedback is valuable as we work to improve ease of maintenance and overall performance. Please reach out to our team at SocialSupport@helenoftroy.com so we can troubleshoot the issue for you. We're here to help!
    Banana2022
    Did you find this review helpful?
    1 out of 5 stars
    Thumbs down graphic, would not recommend
    23 November, 2025Verified purchase

    defective design flaw

    This is our family's preferred style of humidifier. I needed to replace a couple this year, and whatever has been done to the design has absolutely ruined them. We've purchased 5 different units, from multiple retailers, and 4 of the 5 all have the same problem- they will run through at least most of 1 tank, but after that, the unit stops and the red tank-fill light appears. Tank is full, unit is not overheated, just stops. Retailers are putting them on sale to pass off the bad inventory on consumers.
    1 reply from Manufacturer Tech Support team - 2 months ago
    We’re sorry to hear about your experience with the humidifiers and appreciate you sharing these details. It sounds frustrating to have multiple units stop working after one tank, and that’s certainly not the performance we aim for. We’d like to learn more and help resolve this issue for you. Please reach out to us at SocialSupport@helenoftroy.com so we can assist further.
    Matt
    ease of use: 1 out of 5
    quality: 1 out of 5
    value: 1 out of 5
    7 guests found this review helpful. Did you?

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