Best Filterless Humidifiers For Large Rooms

Changing humidifier filters often takes time and money. Here is one of the reasons why people are looking for the best filterless humidifier reviews. Specifically, if you are interested in a large room humidifier comparison, this buying guide will help you to clarify the key points before making a purchase. 

The weather can be terribly cold and dry especially during the winter season. For people that live in such areas investing in an indoor humidifier wouldn’t be such a bad idea especially considering the fact that dry air is detrimental to your health. 

Humidifiers are used in the home, schools, and offices to add moisture to the environment thereby making it conducive for the human body.

If you have used the other types and now intend to buy filterless humidifier online or offline, the following reviews are for you. 

Best Filterless Humidifier Comparison 

Homech 6L Cool Mist Humidifier

With an enormous capacity of 6 liters, the Homech Cool Mist Humidifier is one of the best cool mist humidifiers available in the market. it can remain active for up to 100 hours in a room of about 430 square feet. 

Besides the large filterless tank, it also has a quiet system, a wide opening that makes it easier to clean and maintain. Moreover, Homech 6L cool mist humidifier comes with a 360-degree rotatable muzzle and boil-dry protection that has been pre-programmed to shut off immediately when the tank runs out of water.

This unit has an in-built circuit board with nano-coating to safeguard it and prevent it from damaging. A sponge built at the base keeps dust particles off from the machine. 

Lastly, there is a simple button to monitor output and a sleek dispensable nightlight that creates a placid orange glow.

The Homech 6L Cool Mist humidifier keeps working for 3 minutes even after it has shut down to suck water off in the humidifier tube to ensure that the air is kept clean and healthy.


  • Huge capacity water tank.
  • Low maintenance and easy to clean.
  • Durable and reliable.


  • It always produces a humming noise that can cause discomfort.

MistAire Silver Ultrasonic Cool Mist Humidifier

For people suffering from dry skin and other skin diseases,  the MistAire Silver Ultrasonic Cool Mist Humidifier is the best option for them. It is simply designed, with a capacity large enough to moisten the air for up to 25 hours. 

From past user experiences, this is why it is considered one of the best filterless humidifiers for large rooms.

Although one might think that its water capacity of 1.5 liters is too small, it actually isn’t and can be used continuously without having to be refilled every now and then. This unit operates quietly even when it is fully active and allows you to sleep peacefully at night without an irritating humming noise.

It can comfortably serve an area of up to 250 square feet, making it the best humidifier for large room spaces. If you need a simple machine that can comfortably humidify a small area of space with little fuss, then this MistAire is just right for you. 

It is long-lasting and reliable, backed by a 5-year warranty. Because molds are ways accumulated in filterless humidifiers, a set of cleaning brushes is always included in the pack.

Although this model doesn’t come with many ceremonies and protocols, it produces light at night making it very ideal for the kid’s room especially during the flu and cold seasons. It also shuts off automatically which means that you don’t always have to be on your toes, checking it every now and then since the machine will automatically shut off on its own when the water gets exhausted. You don’t need to worry about overheating and accidents.


  • It operates noiselessly.
  • It features calm light at night.
  • An auto shut function making it safe for people of all ages.
  • Decent active duration for a device of that size.


  • There are no controls to switch off the nightlight when it is not needed.
  • It cannot be used with Essential oils.

Levoit LV600HH Filterless Humidifier 

Levoit LV600HH IM is so far one of the best in the industry and the people’s favorite. It was crowned the best dual mist ultrasonic humidifier. 

Despite being one of the best, it is quite a surprise that it comes with an affordable price tag. It is designed to cover up to 753 square feet, with a capacity of 1.5 gallons that allows it to remain active for up to 36 hours.

The main downside of this product is that it is very costly to maintain and it requires constant cleaning. 

Various nooks and crannies in this device that are difficult to access make cleaning even more tedious. Another disadvantage of filterless humidifiers like LV600HH is that they tend to discharge white dust if hard water is used.

In all, the LV600HH remains a strong device despite a few minor faults. For an affordable price, you get a big room humidifier with a remote control, an authentic humidistat, and an aromatherapy option. Another amazing attribute of the LV600HH humidifier is its ability to show the level of humidity and other settings by simply pushing a single button.


  • Covers a wide area.
  • Delivers a high humidity output daily.
  • It operates noiselessly.
  • It comes with remote control.


  • It is often difficult and expensive to maintain.

Elechomes UC5501 Filterless Humidifier 

This type of humidifier operates on an ultrasonic system. It is able to humidify an area of about 750 square feet. It is built with a large 1.5-gallon capacity tank. 

One of its biggest advantages over other filterless humidifiers is that the exterior is smoothly and beautifully designed.

Unfortunately, to acquire this premium-looking design one would have to pay good money for it. In addition to being expensive, users have often lamented that the warm mist from this model is never warm enough. Also, owing to the expensive nature of this product one would expect a longer warranty but this is not the case as users of this product get only a 1- year warranty. 

All these flaws notwithstanding, the UC5501 is a suitable choice for anyone looking for a strong filterless humidifier with a sleek look. It is automated and therefore allows you to ignore it after having pre-programmed it. 

The ElechomesUC5501 humidifier is basically everything you need in a premium humidifier. 


  • It produces a warm and cool mist.
  • Covers a large area.
  • A big water tank capacity.
  • Modern and sleek design
  • Fully automated humidity detection and control
  • Long-running time (up to 45 hours)
  • It operates quietly
  • There is a provision for aromatherapy oils 


  • Short warranty of one year.

Everlasting Comfort Ultrasonic Cool Mist Humidifier

The Everlasting Comfort humidifier offers one of the best output and running duration.  It also operates on an ultrasonic system. 

Normally, it gives off a large amount of mist and humidity(270mI/h) for as long as 50 hours which makes it a heavy-duty humidifier, ideal for large areas with little or no need for Maintenance.

It is one of the very few products that can be used together with Essential oils. This sweet-smelling oil with your favorite fragrance gets dispensed into the air for a period of time. This feature is great especially for people suffering from insomnia and people suffering from nasal congestion. 

Even when you don’t need to treat an ailment, you can simply enjoy the nice aroma the oil releases into the room.

Features that ensure safety such as auto shut off are also included in this model. Auto shut-off is the ability of the humidifier to shut off automatically when the level of water is very low. 

If you are to use it while asleep, the nightlight function of this humidifier gives you a sense of relaxation and helps you sleep better. Even though this model is large enough to cover wide areas, it still manages to remain quiet over the night.


  • Highly compatible with Essential oils to enrich the aroma of the house.
  • Can serve for up to 50 hours.
  • High output, up to 270 ml/h.


  • It is very heavy and bulky due to a large water tank and therefore is not easily moved from one place to another.

Best Filterless Humidifier Buying Guide: The Key Points  

Even though the market is filled with various types and brands of humidifiers all with their own peculiarities, there are some special features you should consider before getting a humidifier. 

These special features serve as a guide to ensure that you end up with the best available product that is suitable for your needs. Here are some of the features to put into consideration:

Water Tank Capacity

When choosing a filterless humidifier, water tank capacity is one of the most important factors to consider. The effectiveness of the unit to a large extent is dependent on the amount of water the unit can hold at a given point in time. 

Moreover, you must also have in mind the size of the room or house the unit is expected to serve; this will help you decide better.

It is advisable to always invest in humidifiers with a big water tank with the ability to operate over a  long period of time even without refills. This way, the air in your room will be kept warm and moist at all times.

Sound Level

Regardless of the type or model of humidifier you install, it would certainly produce some noise. However, you should be careful about your selection to ensure that you do not choose a model that is too loud and wouldn’t even let you sleep at night.

Generally, the larger a humidifier is, the noisier it would be. 

However, with modifications and advancements in technology, some brands have been able to manufacture large filterless humidifiers with minimal noise. So if your home is a large one, you should invest in one of these instead.


This is yet another indispensable part of a humidifier. The humidistat helps in controlling the level of moisture in the air and does not allow it to exceed a certain point. 

It is necessary that you go for a humidifier that comes with a humidistat because these types are much easier to operate and control. 

A unit without this feature is capable of creating extreme amounts of moisture that can be detrimental to the health and may even cause damages to fixtures and furniture in the home.

Best Filterless Humidifier For Large Rooms: The FAQs

Can Humidifier make you sick?

Although the benefits of humidifiers can never be overemphasized, it can also make one sick if the user is not cautious enough. Lack of proper Maintenance makes the humidifier dirty and it becomes a breeding place for molds and bacteria. Very high humidity level also causes harm to the health that is why it is advisable to get a humidifier with a humidistat.

What can I put in my humidifier to kill bacteria?

Hydrogen peroxide can be used to get rid of bacteria and other harmful microorganisms in the humidifier. This chemical is affordable and readily available. Just add a few drops of hydrogen peroxide into the water reservoir and the job is done.

Are filterless humidifiers better?

Yes, of course, they are better especially in dry weather conditions but if your budget is low and you need an affordable humidifier, you shouldn’t consider filterless humidifiers as they are always more expensive.

Do humidifiers kill airborne viruses?

Humidifiers get rid of viruses in the home especially when the humidity level is very high. An efficient humidifier helps reduce the population of flu viruses to the barest minimum.

Can you run vinegar through a humidifier to clean it?

Cleaning with vinegar is one of the most effective ways to keep a humidifier clean. To do this, you simply pour a cup of vinegar and a gallon of water into the receptacle. Plug it in and allow the humidifier to run for about an hour or so. Pour out the remaining liquid and repeat this process with clean water.


A filterless humidifier is a general term used to describe humidifiers that operates without filters. What makes them so attractive is their long term low maintenance cost. This is because one does not have to constantly change filters. These humidifiers keep the air in the home and the environment moist.

Before you make your purchase, don’t forget to check the return and replacement policy in case of any defects. Following the links in this post will lead you to individual product sales pages. From there, you can ask more questions and get insightful answers from other experienced users of filterless humidifiers. 

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