JavaScript must be enabled in order for you to see "WP Copy Data Protect" effect. However, it seems JavaScript is either disabled or not supported by your browser. To see full result of "WP Copy Data Protector", enable JavaScript by changing your browser options, then try again.

Honeywell HCM 350


I f you have decided to go with a classical evaporative humidifier that has been tested by generations and only got better and better over time, this unit should be among your nominees. The arguments for buying it are quite simple. Firstly, you should consider it for its massive tank, which is transparent and allows for quick water level evaluation. Secondly, most customers describe it as quiet, which is a performance, considering that, as all evaporative models, it engages a fan.

Honeywell HCM 350 Image

Check Price at Amazon

Evaporative Technology

The most in vogue technologies used in the humidifier industry are ultrasonic and evaporative. The first one is regarded as being quieter, as it implies the presence of a small metal plate, which, through the so-called adiabatic process, vibrates at very high frequencies and splits the water into tiny drops that disperse around the air. Ultrasonic technology is also cheaper, as the water doesn’t need to be boiled for the humidification process to take place. On the other hand, there is a huge advantage that is offered by the evaporative method. As the water is primarily boiled, a big part of the viruses and bacteria are instantly killed, so they don’t have the possibility of getting inhaled.

This process may seem complicated but the truth is that it is based on the most common technology. The machine is provided with a wick filter, which is essentially a big sponge. The water is drawn by the sponge from the water recipient, which acts as a barrier against minerals as well. The fan draws the dry air inside the unit, pushing it through the sponge until it gets filled with moisture. Furthermore, the evaporative system is self-regulating. To put it simply, when the humidity reaches the optimal value no more vapors will be released. Thus, there’s no risk of over humidification, and you don’t even need a last-generation hygrometer to tell you when it’s time to shut down the process.


Compared with ultrasonic models, it is rather large, so you won’t manage to just squeeze it on your countertop. You will need to clear some space for it, especially as you will want to remove the tank for refilling and cleaning. On the other hand, it does have a clean look, with a blueish transparent reservoir that allows you to see through. The fan is placed under a dense grille so little hands or paws won’t reach it.

It is easy to break apart in pieces, so it was easy to determine their durability and quality. This also means that it is easy to scrub and keep clean over the years. The only inconvenience that may arise is the maintenance of the wick, which needs to be completely dried out if the unit is to be put out of use for a while. Otherwise, it will become a favorable factor for mold. The knob placed on the top is everything you need for adjustments. It is both an on/off button and a speed regulator, so you will quickly learn how to use it.


Honeywell HCM 350 Spec Sheet
Technology Evaporative
Area coverage Medium to Large Rooms
Water tank capacity 1.1 gallons
Dishwasher safe Tank & Tray
Runtime 24 hours
Mist type Cool
Mist levels 3
Energy Usage 60W
Noise output Low
Automatic shut-off
Size 17.48 x 9.37 x 11.85 in.

Warranty 3-year
Check Price at Amazon

Main Features

Although it uses boiling as the base of its process, the mist it releases is cool, so you can use it all year round, even in the summer. Its 1.1 gallons tank makes it fitting for all-day use, as it can disperse the mist into large rooms while working continuously for 24 hours. Besides that, it comes with a large array of features that make it more practical and attractive:

  • UV-light – all the bacteria that escape boiling will be killed under ultraviolet radiation
  • Quiet Care technology – allows it to run quieter than its competitors in a proportion of up to 30%
  • Break-resistant water reservoir – specially built to resist accidental drops
  • Selectable mist output – up to 3 options, easy to select by turning the knob
  • Invisible mist – doesn’t set on the furniture or upholstery


The most appreciated aspect of this unit is the large opening of the reservoir which allows for refilling without spills. Both the tank and the tray can be cleaned in the dishwasher, and a simple 15-minute vinegar pre-soak can remove all the unpleasant smells. However, as it a basic unit, it doesn’t include a timer or smart functions that would have allowed for in-advance programming. Moreover, the boiling requires energy, which translates into a 60W power consumption rate. Compared to ultrasonic models, it is rather costly. Not to mention that you will have to replace the wick almost every month.

Final Thoughts

Per ensemble, you should buy it if you need to reduce dryness in a medium or even a large room. Although it has a large footprint, it offers access to the internal components for easy cleaning and comes with a shock-resistant water tank, so you will be able to prevent mold growth and preserve the recipient intact even if an accident shall occur. Moreover, apart from the evaporation method, which is a natural filter against germs, it incorporates a UV lamp as well, designed to take water purification to a whole new level.

Logan Hewitt
Logan Hewitt
Logan was born and raised in Bakersfield, California, one of the most affected American cities by pollution, experiencing firsthand the phenomenon’s dangers. He worked in retail for a small electronics shop for 5 years, where he had his first experience with air purifiers. With his interest in technologies that are meant to improve life quality and the technical skills he gained with the passing of time, Logan is able to provide readers with in-depth analysis of life-changing devices.