Manufacturers all over the world are continually doing research on how a humidifier can improve, from energy consumption to performance and production of clean, harmless mist, the features that can be improved in a humidifier are endless. One of the significant features, however, that is always in contention for improvement is the cleanliness level of mist produced, therefore leading to production of the best humidifiers with UV light.

Ultraviolet light is rays that are almost proportional to that of sunlight, which allows it to kill germs and makes it much suited to being designed into UV light humidifiers. humidifier with uv sanitizing light is crafted with a specially designed bulb, which is safe to be used around humans, making whole-house humidifiers with UV light a very much popular product today.

Warm mist humidifier with UV light also exists, which is simply a portable device with that extra addition of a light bulb for sanitizing water that is to be mystified, and this humidifier UV rays don’t get out into the environs, but are instead confined around the area it is needed in the unit.

What does a UV light do in a humidifier?

A UV air purifier in a humidifier works to clean the water. It uses a special light bulb that emits UV rays when turned on. These rays kill tiny germs like viruses and bacteria, which are so small that a filter can’t catch them.

These germs can be harmful if they get into our bodies. So, the main job of the humidifier isn’t just to add moisture to the air. Its most important role is to make sure it does this in the safest way possible, by disinfecting the environment and getting rid of these harmful microorganisms that can cause illness like humidifier cough.

Top 2 best humidifiers with UV light

1) Pure Guardian H5450BCA Ultrasonic Warm & Cool Mist Humidifier UV-C 99

Special features: warm and cool mist option, ultrasonic humidifier, 2-gallon water capacity, aromatherapy, silver clean protection, night light, product dimensions; ¼ x 10.1 x 19.8 inches, item weight 6.2 pounds.

Pure Guardian H5450BCA Ultrasonic Warm & Cool Mist Humidifier UV-C 99
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This is a decent looking device, designed with a transparent see-through tank that gives it a functional appearance while being able to hold a right level of water actually to affect the humidity in a single water fill cycle. The device comes with the analog knob as its source of the control system, allowing users to toggle between several humidification speeds and the off buttons, as well as other indicator lights.

Backed by a water tank of about 2 gallons in capacity, the runtime of this device is more than impressive, being able to go as far as 100hours before a refill is needed. That is a little over 4 days of stress and hands-free performance. It is also able to create both cold and warm mist options, making it useful across different seasons in a year, as well as being ultrasonic type, which makes it very quiet while running.

With this device, you can wave goodbye to the problem of mold and bacteria accumulation in its water tank due to its specially designed silver protection body, making the tank antimicrobial in every regard. The mist produced by this device is also very clean, not just as a result of the silver protection, but also a built-in UV-C light cleaner, which further sterilizes water in the tank, killing germs and other contaminants before humidification process.

The unit can be operated through the use of a timer, which basically allows it to run itself for a duration of time explicitly chosen by the user. There also exists a low water level indicator that glows when the tank becomes empty and an auto-shutoff feature that turns off the device to prevent damages resulting from overheating.


  • long runtime
  • suitable for medium to large-sized rooms
  • quiet operation
  • antimicrobial tank
  • essential oil compatible
  • UV-C light
  • timer
  • auto shutoff
  • low water level indicator


  • Not durable. Made with plastic

2) Honeywell HCM350W Germ-Free Cool Mist Humidifier 

Special features: cool mist evaporative technology, product dimensions; 17 x 9.4 x 11.8 inches, item weight 8.36 pounds, UV-C light

Humidifiers with uv light
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This is a very portable humidifier, and also really lightweight, it is effortless to move around the home. It also comes with the traditional analog control knob for varying settings by the user, while having a pretty decent tank size for a fair enough back up time. The device has okay level moisture increasing capacity, and would be a decent fit in some homes.

The product employs a traditional cool evaporative technology; hence it is able to create a clean and fine mist, but only the cool type. Due to the only cool mist option being available, this device is more suited to summer use and lacks the soothing relief provided by warm mist in winter. It can also run for about 24 hours before a refill is needed, which is a decent but not Impressive runtime.

Cleaning this product is, however, very easy to clean and was even awarded the best easy to clean humidifier award in 2019. With the presence of UV-C light, you can expect an immaculate mist production because it purifies water in the tank before it is broken into the mist.

It is very suited to be used in small to medium-sized rooms, where would have a very high amount of impact on the atmosphere, though it lacks a timer feature, unlike the Pure Guardian H5450BCA. This product gives every customer a 3-year limited warranty on the purchase, making it a relatively risk-free investment.


  • good runtime,
  • UV-C light,
  • easy to clean,
  • 3-year warranty


  • cool mist only,
  • suitable for small to medium-sized rooms,
  • lack of a timer

Does UV light kills molds and other Microorganism?

It was earlier said that UV lights are very effective against microorganisms that could cause infections, and these microorganisms ganged up in millions is what becomes more visible infections like bacteria build-ups and molds.

When UV light is released to the water, it brings with itself the same power of sunshine, killing the organisms that cause the visible buildup result, and as a result killing the buildup itself. In essence, UV light is able to kill mold as far as it touches it, treating both the one you can see and unseen (Mold spores).

Features to consider in choosing the best humidifier with UV light

UV light: It shouldn’t be a surprise that possessing a UV light is an essential quality to consider when choosing the best humidifier for clean mist generation purposes.

Though humidifiers are ordinarily safe, units with this feature take safety to a whole new level, attacking contaminants at a micro level, and only allowing clean water to be mystified.

Capacity: Although the possession of a UV function is essential, it is also necessary to consider the capacity of the unit, precisely how much room space it can serve, to determine if it would actually be able to do the humidification job.

This quality gives preference to the humidification work, rather than how clean the mist would be.

Antimicrobial infused tank: Another level of cleanliness a humidifier can attain, is in its ability to refute the common buildup of mold and bacteria in its tank over time. This is where this feature comes in, and it is convenient to ensure a clean, safe mist while reducing the amount of time spent on and between maintenance.

Quiet operation: This is responsible for how noisy or quiet a unit would be in service, and of course, anyone would pick a quiet product than a noisier one.

Quiet humidifiers also have the advantage of being able to be used anywhere in the home, ranging from the sitting room to bedroom, and can even be left running over the night, without disturbing sleep.

humidifier with uv sanitizing light – Pros and Cons

There are several pros and cons to using a UV infused humidifier, and they are;

What we like:

Highly effective:

The significant advantage of using devices with infused UV light is due to how effective they are in doing the job. As far as it is able to come in contact properly with the water, UV lamps are well and able to kill up to 99% of microorganisms, including bacteria, viruses, and mold.

It can be easily replaced:

UV bulbs mostly have an expiry date, where the light produced becomes too weak to make the desired impact, becoming relatively a glowing bulb in the unit. It can, however, be easily replaced by purchasing the exact model from the nearest electronic store.

Useful against airborne contaminants:

The UV light doesn’t only kill contamination in the water, but rather also anyone that finds itself in the air surrounding it. It is, therefore, a double-edged sword, eliminating both waters as well as air contaminants, in a win-win situation for the user.

Doesn’t consume energy:

Placing a UV supported humidifier, beside a non UV supported one, there is basically no difference in energy consumption between the two. This means that the bulb raises your safety by a higher level while adding next to nothing on energy bills at the end of the month.

What we dislike

  • Being a light bulb, its surface is very attractive to dust and other floating particles, therefore making it in need of frequent cleaning to be effective. It is also essential that the unit is off before this act is carried out.
  • Though UV light is very effective against mold, bacteria, and mildew, when it comes to viruses, it is far less effective due to the nature of the coated body possessed by this organism.
  • Another downside of devices with only UV light is the fact that it is only able to kill organisms while doing next to nothing to particles. For this reason, these devices need to be used with a filter for the complete cleaning process. It also does very little to prevent mineral builds over time; therefore, it would still need physical intervention for proper maintenance.
  • The live span of UV bulbs is pretty short. Depending on the manufacturer and device in question, some could last as much as a year before needing replacement, while others can only manage about 6 months.
  • Also, depending on the device and manufacturer, some UV bulbs can be relatively expensive to replace, and there are even several cases of the bulbs almost costing half of the price for purchasing the device.

Final Verdict : Best Humidifiers with UV light

Our best pick from tests and performance on the best humidifier with uv sanitizing light is going to be the Pure Guardian H5450BCA. The device has a pretty decent water tank capacity, but an extremely impressive runtime, which is mainly due to the unique design that helps it maximize water over a long period of time. It is also suited to large-sized rooms and releases very clean mist due to an antimicrobial tank, as well as the UV-C light.

The Honeywell HCM350W product is also a safe bet for picking, on devices with the best UV light. Of course, it comes as an adequate UV cleaning capacity, as well as an antimicrobial, infused tank, keeping the mist clean and safe, but it is, however, suitable for small to medium-sized rooms only.

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