Honeywell HWM845 Warm Mist Humidifier
- 1 gallon tank
- 24 hour runtime
- Warm mist vaporizer
- Wick filter, 120 volts, corded
- 37.2 square meters coverage as listed
- 1.8 kg, 10 x 5.47 x 11.5 inches
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A one-gallon warm mist humidifier that runs a full day on a fill, with a filter and manual in the box. Cleaning steps and a noise rating are not listed.
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ASIN: B07GQ2CF4TModel: HWM845Category: Humidifiers
Overview
Honeywell builds this warm mist humidifier as a vaporizer, heating water into mist for a bedroom, living room or office. It runs on a wick filter, plugs into a wall outlet and uses touch control.
A large tank and a long runtime mean fewer refills, and warm mist suits cold, dry rooms. The coverage area is stated in metric units, and the listing gives no cleaning directions or noise figure.
Who it's for
A household that wants warm mist during dry months is the target, whether in a sleeping room or a work space. Homes with young children who might touch a warm surface, and shoppers wanting cool mist, should look elsewhere.
Pros and cons
- Large water tank
- Long runtime per fill
- Warm mist vaporizer
- Wick filter included
- Cleaning steps not listed
- Noise rating unstated
- Warm output only
Performance notes
The vaporizer heats water into warm mist, and the wick filter in the unit is part of the water path. Runtime depends on the tank volume and the output setting, and the listed figure is for a full tank.
Specifications
| Brand | Honeywell |
|---|---|
| Model | HWM845 |
| Dimensions & fit | |
| Item Dimensions D X W X H | 10 x 5.47 x 11.5 inches |
| Item weight | 1.8 kg |
| Capacity & performance | |
| Capacity | 1 gallon |
| Power & efficiency | |
| Power Source | Corded electric, 120 volts |
| Construction & materials | |
| Material | Plastic |
| Color | Black |
| Included components | |
| Included Components | Water filter, user manual |
| Other details | |
| Floor Area | 37.2 square meters |
| Runtime | 24 hourslower than 55% of 21 humidifiers |
| Operation Mode | Warm mist vaporizer |
| Filter Type | Wick |
| Control Type | Touch |
| Room Type | Bedroom, living room, office |
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Frequently asked questions
How do I clean the Honeywell HWM845 humidifier?
The listing gives no cleaning steps, so follow the user manual that comes with the unit. A wick filter is part of the water path.
Does the Honeywell HWM845 make cool mist?
No. It is a warm mist humidifier that works as a vaporizer.
What comes with the Honeywell HWM845?
A water filter and a user manual, as the included components state.
How long does the Honeywell HWM845 run on one fill?
The listing gives a runtime of twenty four hours on a full one gallon tank.