Details come from the older review, the maker’s claims and the Amazon listing, checked on October 11, 2026. Coverage numbers are maker claims.
The Honeywell HWM705B is a simple warm mist humidifier. It boils water, adds a gentle steam and needs no filters. Here is a plain look at how it works and how it compares.
Table of Contents
What You Get
Price on Amazon: $39.49 | 4.2 stars from 7,813 ratings (checked October 11, 2026)
Design and Size
The HWM705B is a classic-looking, compact unit. The older review measured it at 12 by 10.5 by 6.2 inches and about 5 pounds. The tank is clear, top-fill and removable, and the wide opening is easy to fill and clean. It fits a nightstand or a desk.
Looking ahead, warm mist is a small, steady corner of the humidifier market. Shoppers who like the warm feel and the boil keep buying simple units like the HWM705B, while parents lean toward cool mist. The catch is that heat means a burn risk and a higher power bill, and cheap warm mist units are not always built with the safest shutoffs.
Features and Performance
- Warm mist. It heats water to a boil and releases warm mist. The older review noted about 1 gallon of output per 24 hours and coverage up to 250 square feet, per the maker.
- Filter-free. No wick to replace.
- 2 output settings. Low for small rooms, high for drier or larger rooms.
- Auto shutoff and refill light. It turns off when the tank is empty and a light tells you to refill.
- Medicine cup. For inhalants or a few drops of essential oil. Follow the maker rules.
- Tank. About 1 gallon, up to about 24 hours on low.
The boil limits bacteria in the water, which a cool mist unit does not do. You still need to clean it.
The risk to watch is scale and heat. Hard water leaves a crust on the heating plate that shortens the life of the unit, and a hot tank can scald if it tips. Expect more listings with big health claims. Keep it out of reach, wait for the water to cool before you refill and descale it on a schedule.
Noise Level
It is quiet for a warm mist unit. It makes some boiling noise and a gurgle when the water level drops and air replaces the water. The older review noted that the design blocks most of the noise.
Maintenance
Soak the unit in vinegar for about 15 minutes, then brush off scale with a soft brush. The plastic parts are easy to clean. Before refilling, let the water cool. Hard water leaves more scale, see why a humidifier leaves white dust. Check humidity with one of the indoor hygrometers.
HWM705B vs Vicks V745
The two are close in price. The Vicks has a more powerful output, so it runs fewer hours per fill, see our Vicks V745 review. For a child room, see humidifiers for babies and kids first. More choices are in the warm mist humidifier buying guide.
Prices and Alternatives on Amazon
Prices and ratings were checked on Amazon on October 11, 2026.
Price on Amazon: $39.49 | 4.2 stars from 7,813 ratings (checked October 11, 2026)
The Honeywell HWM705B is the model reviewed on this page.
Price on Amazon: $39.49 | 4.3 stars from 27,376 ratings (checked October 11, 2026)
The Vicks V745 has a 4.3 rating from over 27,000 ratings. See our Vicks V745 review.
Price on Amazon: $79.93 | 4.1 stars from 1,057 ratings (checked October 11, 2026)
The TTLIFE 6L makes warm or cool mist, with a remote and a humidity setting, per the listing. It has a 4.1 rating from about 1,000 ratings.
Price on Amazon: $89.99 | 4.2 stars from 3,505 ratings (checked October 11, 2026)
The Elechomes UC5501 has a 4.2 rating from about 3,500 ratings and a sleep mode, per the listing.
Pros and Cons
Pros: filter-free; large 1 gallon tank; refill light and auto shutoff; medicine cup; easy to fill and clean; low price.
Cons: only 2 settings; water must cool before you refill; bubbling sound; hot tank is a burn risk.
FAQ
Does the Honeywell HWM705B need a filter?
No. It is filter-free.
Is warm mist safer for germs?
Boiling helps limit bacteria in the mist, but you still need to clean the tank.
Is it safe for a nursery?
It has a hot tank, so keep it well out of reach, or choose cool mist.
Final Word
The HWM705B is a good low-cost warm mist unit for an adult bedroom or office. For kids, choose cool mist.
What happens next: expect more warm and cool hybrids and more refill lights and shutoffs on budget models. The HWM705B stays a simple pick for an adult bedroom or office.
Related Guides
Keep going with warm mist humidifier buying guide, Vicks V745 review, humidifiers for babies and kids, why a humidifier leaves white dust and indoor hygrometers.
