Top 5 Warm Mist Humidifier in 2020

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A cool mist humidifier is an excellent option for homes in the warmer months, especially areas known for having a hot, dry climate. When winter rolls around, and you still need humidification, things can get tricky. Well, the best warm mist humidifier can add a bit of warmth to chilly rooms during fall and winter while also humidifying the air in your home.

The Best Warm Mist Humidifiers

While there aren’t as many warm mist humidifiers on the market, finding the best models requires a considerable amount of research. When searching for our top picks, we quickly discovered that the market was littered with mediocre machines, and there were plenty of systems with suspect ratings or reviews. With that in mind, we focused on models from reputable brands and chose a range of sizes that will cover any home.

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LEVOIT LV600HH

LEVOIT LV600HH

  • Capacity: 1.5 gallons
  • Coverage: 750 sq. ft.
  • Output Levels: 3
  • Aromatherapy: Yes
  • Warranty: 1-year
Stadler Form Eva

Stadler Form Eva

  • Capacity: 1.6 gallons
  • Coverage: 860 sq. ft.
  • Output Levels: 5
  • Aromatherapy: Yes
  • Warranty: 1-year
Vicks MWM845

Vicks MWM845

  • Capacity: 1 gallon
  • Coverage: 500 sq. ft.
  • Output Levels: 2
  • Aromatherapy: Yes
  • Warranty: 3 years
Homedics UHE-WM70

Homedics UHE-WM70

  • Capacity: 1.7 gallons
  • Coverage: 400 sq. ft.
  • Output Levels: Variable
  • Aromatherapy: No
  • Warranty: 1-year
Aprilaire 800

Aprilaire 800

  • Capacity: N/A
  • Coverage: 6,200 sq. ft.
  • Output Levels: 6
  • Aromatherapy: No
  • Warranty: 5 years

#1 LEVOIT LV600HH Hybrid Ultrasonic Humidifier

LEVOIT LV600HH

Dual-purpose or 2-in-1 humidifiers have become incredibly popular as they allow homeowners to have warm or cool mist depending on their preference. One of the best ultrasonic systems in that category comes from LEVOIT with the LV600HH, and it’s an excellent choice for medium to large rooms.

Whether you choose warm or cool mist, the LEVOIT LV600HH can cover areas up to around 750 square feet. The tank holds 1.58 gallons of water, which provides a runtime of up to 36 hours on low. This system also has three speeds to go along with an automatic mode. The output is listed at 500ml per hour, and it’s quiet with a decibel level of only 36 dB.

The design of the LV600HH helps set it apart from the popular, but common round and teardrop style systems. It has a large digital display on the front and a see-through tank that’s easy to clean. You can access all the humidifier’s functions from the front panel, but they are also available with the included remote. It’s a nice touch, but so is the 12-hour timer and digital humidistat.

With a unique style and high-capacity tank, the LEVOIT LV600HH is well worth a look if you’re in the market for a dual-purpose humidifier. Consumers were pleased with its overall performance and like the amount of features for the price, even if several felt the handle and tank need a redesign. This humidifier has a 1-year warranty and is available in two colors with Black or White.

Pros: Capable of producing warm or cool mist. Excellent set of features including a 12-hour timer, digital humidistat, and remote control.

Cons: Nothing significant.

#2 Stadler Form Eva Ultrasonic Humidifier

Stadler Form Eva

The Stadler Form brand may be unfamiliar to consumers in U.S. households, but it’s a name Europeans know well. They have produced some of the more innovative systems from a design standpoint, and the Stadler Form Eva certainly falls into that category.

This minimalistic humidifier will stand out in a room, but she will a small footprint behind. The Eva humidifier has a functional design featuring an elevated mist outlet and is built so that it can sit directly on the floor.  There is a small, but unobtrusive digital display at the bottom and a discreet row of controls around the top edge.

With an output of 3.5 gallons per day, the Stadler Form Eva is one of the more powerful humidifiers on our list. It has a 1.6-gallon tank with a range of 860 square feet, and won’t keep you up at night. The decibel range is listed between 26 – 34 decibels, and the display can be dimmed or completely turned off. That is just one of the many features found on the Stadler Form Eva.

You can use essential oil with this humidifier, and it has five speeds, including an automatic mode with adaptive technology. There’s also a cleaning mode, a hygrostat, and a preheating feature. The remote is an interesting feature that doubles as an external sensor, which gives you an extra level of control. It’s modeled after the humidifier and comes complete with a matching silver base.

There’s a lot to like about the Stadler Form Eva from the sleek design to the fact it can produce both warm and cool steam. Consumers felt it was quiet for its size and loved the extended mist nozzle, which keeps the floor around the system dry. The remote is a great benefit as well, although it’s expensive and comes with a short warranty considering the price.

Pros: High output humidifier with five speeds. Elevated mist outlet and external sensor. Compatible with essential oils.

Cons: It’s expensive and has a short 1-year warranty.

#3 Vicks VMW845 Warm Mist Humidifier

Vicks MWM845

There are plenty of humidifiers on the market with high-end bells & whistles. Sometimes, less is more, however, especially if you’re looking for a system that won’t break the bank. Vicks has a variety of affordable humidifiers, and the Vicks VWM845 is our pick for the best budget humidifier.

Despite the fact it’s a bit over 11.5” tall, the VMW845 has a large 1-gallon tank. The tank has a handle that makes it easy to fill, and thanks to the design, you can clearly see the water level on this filter-free system. The opening is large enough to easily slide your hand into, which makes this humidifier an absolute breeze to clean.

While simple, the Vicks VMW845 still has two output settings and an automatic shutoff feature for when the tank runs dry. It can run for up to 24 hours and allows you to medicate the steam in two different ways. On top, you’ll find a built-in medicine cup, but on the back is a scent door that can hold two of the company’s VapoPads.

You won’t find a time or digital controls on this humidifier, but it’s incredibly easy to use and has an attractive price point. When you factor in the 3-year warranty, it’s hard to overlook this system even if it’s light on features. We didn’t notice any significant complaints about this humidifier, aside from scattered reviews related to quality control.

Pros: Simple to use and easy to clean with a budget-friendly price tag. Two speeds, a medicine cup, and a VapoPad slot. Large 1-gallon tank.

Cons: None

#4 HoMedics TotalComfort Warm & Cool Mist Humidifier

Homedics UHE-WM70

HoMedics is a popular option when you’re looking for an affordable massager, and they have an excellent line of humidifiers as well. While several are capable of producing warm mist, the HoMedics UHE-WM70 is the best warm mist humidifier when the runtime is a concern.

All of the humidifiers on our list can get you through the night, but the UHE-WM70 is built to go for days. This humidifier has dual water tanks with a total capacity of 1.7 gallons, which gives you a runtime of up to 80 hours. You won’t have to deal with the system for days, and mold won’t be a concern. That’s because the tanks of this humidifier are treated with Clean Tank anti-microbial technology.

Automatic shutoff is included on this system as well along with a night mode. There’s also a nightlight feature and a button that lets you choose between warm or cool mist. The mist output is adjustable through a dial on the front, but there are no other noteworthy features. The UHE-WM70 is rated for rooms up to 400 square feet.

The HoMedics UHE-WM70 may not be fancy, but it holds a lot of water and has the longest runtime of any humidifier on our list. The only disadvantage to this machine is the size as it’s a bit large because of the design, so you may need to think about placement with this one. This humidifier comes with two demineralization cartridges and has a 1-year guarantee.   

Pros: High-capacity humidifier with a runtime of up to 80 hours and dual water tanks. Built-in nightlight and variable speeds.

Cons: Light on features.

#5 Aprilaire 800 Whole House Steam Humidifier

Aprilaire 800

When you need to humidify an area over 1,000 square feet, tabletop humidifiers aren’t going to cut it. A whole-house humidifier is usually the best alternative, and Aprilaire makes some of the best units around. Our top steam humidifier from the company is the versatile Aprilaire 800.

The 800 uses the existing ductwork in your home to deliver steam throughout large areas up to 6,200 square feet. Unlike other warm mist humidifiers, this machine creates steam by energizing a set of electrodes inside a steam canister. As temperatures reach up to 212°F, you’ll never have to rely on distilled water, and maintenance is an absolute breeze.

The canister on the Aprilaire 800 only needs to be changed once a year. It even has an automatic drain cycle that purges the canister after 168 hours to keep things clean. This particular model comes with dual sensors that measure the temperature inside your home and outdoors to ensure optimum efficiency regardless of the season. The output is variable as well, with a rating of 11.5 gallons per day at 110 volts and 23.3 GPD at 240 volts.

This system obviously isn’t for everyone, although it’s one we highly recommend if you need a steam-based system that can cover homes both big and small. The initial price is a drawback as it’s more of an investment than other humidifiers, but one that’s well worth it. If you still want total home coverage but don’t want to deal with ductwork, the Aprilaire 865 is a fan-powered variant of this system.

Pros: Covers up to 6,200 square feet and has dual sensors for increased efficiency. Easy to use and maintain with an automatic drain cycle and variable output.

Cons: Initial price. It will require a professional installation.

You may also like: Aprilaire Humidifier Reviews and Buying Guide

How to find the Best Warm Mist Humidifier 

When looking for the best warm mist humidifier, most of the areas you’ll need to keep in mind are the same with other types of systems. That means things like coverage, capacity, and runtime are important, although there are several other areas of intersest with steam-based systems.

Warm Mist Humidifier Pros and Cons

While warm mist humidifiers work just as well as their colder counterparts, there’s a reason cool mist systems outnumber warm mist humidifiers by a wide margin. Compared to other types of humidifiers, there are a few drawbacks you will want to be aware of to go along with the advantages.

Warm Mist Humidifier Pros

Warm mist humidifiers are the best type of humidifier if you are concerned about bacteria. The heated water reduces that chance of mold or bacteria building up in the tank and entering the air in your home. These systems are also commonly used with inhalants or essential oils.

That makes a warm mist system an ideal option for cold & flu season. The mist from these humidifiers can take the chill out of the air as well. They are a better choice for colder climates or the winter months when compared to a cool mist system.

Warm Mist Humidifier Cons

There’s an increased chance of injury whenever you have something running in your home that contains hot water or produces steam. That’s why warm mist humidifiers are generally not the best choice for children’s rooms or homes with pets.

A warm mist humidifier isn’t quite as efficient as other humidifiers and can be more expensive as well. Size is also a limiting factor considering there are only a handful of systems that can handle large areas or an entire home.

Coverage

How big is the area you need to humidify? Once you understand the advantages and disadvantages of a warm mist humidifier, it's time to put some serious thought into room sizes.

Most manufacturers let you know how large of an area their machine can cover by giving a square footage rating. While that's helpful, you first need to know how large the room is you are trying to humidify, and some companies provide two numbers instead of one.

To calculate the square footage of a room, simply multiply the length times width. A room measuring 10’ wide and 12’ long, would be 122 square feet, which means you need a small system. While that may seem pretty clear cut, it doesn’t take ceiling height and other factors into account. Needless to say, the size of the room isn't the only specification to keep in mind with coverage.

Capacity 

Every humidifier outside of personal systems will have a water tank or reservoir. It's one of the few things every humidifier has in common, and it should be an important part of your buying decision as well.

Choosing a humidifier with a large 2-gallon tank over one with a smaller reservoir may seem like a no-brainer, but that isn't the case at all. Larger containers can be harder to manage, so consider the additional weight along with the design of the tank itself.

A number of warm mist humidifiers didn't make our list because they had poorly designed water tanks. From tanks that leak to ones that were just hard to fill, there are hundreds of complaints when it comes to humidifier tanks.

Runtime

Another specification you will encounter when shopping for the best warm mist humidifier is runtime. This area is tied directly to the size of the tank, but also to how efficient a humidifier is. More efficient humidifiers will have an excellent output rate, even with a smaller tank.

While many of these systems can have reservoirs under a half-gallon, they can still provide enough moisture to last you through the night. Budget-friendly humidifiers and cheap machines tend to have large tanks, but poor runtimes. When considering the runtime, think about how often you want to fill the tank along with how frequently you'll use the humidifier.

Ease of Use

Humidifiers aren’t complicated machines. More often than not, the manuals are rather simple, so you won’t need a degree to operate even the most high-tech humidifier. That being said, some systems are designed to be easy to use while others seriously falter in that area.

When you’re dealing with hot water, you want a humidifier that’s easy to fill, clean, and empty. These systems are built to be safe in that regard, but some are incredibly difficult to clean. Even though a warm mist humidifier can help keep germs at bay, they still need regular maintenance and cleaning.

Design plays a large part when it comes to ease of use. We’ve seen humidifiers with a unique style that caught our eye, which received negative reviews for poor designs. Most of the time, that includes hard to clean tanks and nebulizers, but we’ve also seen plenty of complaints related to poorly placed controls as well.

Safety

As mentioned, the biggest drawback and concern with a warm mist humidifier is the heat itself. It’s not enough to run you out of a room, but it can cause burns. There are a few built-in safety features that help like automatic shutoff, but considering placement and pets beforehand is your best defense.

With the materials used, we did notice several manufacturers with BPA-free humidifier tanks. Unfortunately, that information is sparse and varies by brand or collection. If you are looking for a system that’s safe from that standpoint, you may have to contact the manufacturer.

Features

While you won’t find as many warm mist humidifiers on the market as cool mist systems, these steam-based machines have plenty of features. You can find budget-friendly models that simply double as a nightlight, but that’s just the tip of the iceberg when it comes to creature comforts.

You won’t have to look hard to find a humidifier with variable speeds, automatic shutoff, or a night light feature. UV-C lights are a different story, and we only saw a handful of systems with additional filtration. Digital controls are a popular option with mid-range and premium systems, and you’ll find plenty of timers in that tier as well.

Outside of Wi-Fi and a few other high-tech bells & whistles, if there is a feature you’re looking for on a warm mist humidifier, there’s a good chance you’ll find it. That includes combo systems that produce both warm and cool air and top-fill humidifiers.

Humidifier Warranties

Most humidifiers come with a standard 1-year warranty. That rule holds true whether it’s a well-known brand or one you’ve never heard of, but can vary with certain types of humidifiers. An ultrasonic system tends to have a longer warranty that a simple cool mist humidifier with a wick filter, and the same goes for warm mist humidifiers.

There are still plenty of warm mist humidifiers with 1-year warranties, but we found that, on average, you can expect anywhere from 3-5 years from some brands. You’ll find a few of those companies on our list, but they are far from the only ones with longer guarantees.

Ultrasonic and warm mist humidifiers often have a better selection of replacement parts available. That’s a bonus if a machine has a short warranty. Depending on where you shop, an extended guarantee may be a worthwhile option as well.

Warm Mist Humidifier FAQ

Q: Can I use essential oils in any humidifier?

A: You should never use essential oils directly in the water tank of a humidifier. It can damage the unit or break down the tank itself over time. Essential oils are typically used in a vaporizing tray, and should only be used as directed by the manufacturer of your humidifier.

Q: Is it safe to sleep with a humidifier on?

A: Sleeping with a humidifier is perfectly fine, and many homeowners buy them for this purpose. Some systems have also have built-in sleep modes to keep things quiet or nightlights.

Q: Can I use a humidifier and air purifier in the same room?

A: Yes, although an air washer is a 2-in-1 system that humidifies and cleans your air.

Q: Is a cool or warm mist humidifier better?

A: Cool mist systems can freshen up rooms on hot summer days, while warm mist humidifiers can add some heat to a room in winter. Both serve the same purpose, so it’s a matter of preference and need. If you’re not sure which system is the right fit, our humidifier type guide can help you find the perfect style.

Q: What is the ideal humidity level indoors?

A: It depends on several factors, but a range between 30% to 50% is highly recommended.

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