We independently evaluate all of our recommendations. If you click on links we provide, we may receive compensation. Shopping Home Products Air Quality Products The 15 Best Humidifiers of 2024, Tested and Reviewed We tested over 50 humidifiers and found the best options to combat allergies, asthma, dry skin, and more. By Melanie Fincher Melanie Fincher Melanie Fincher is a commerce editor with four years of experience writing product reviews and lifestyle content. She was the former SEO writer for Allrecipes, covering product reviews, cooking tutorials, and food news. Real Simple's Editorial Guidelines and Jamie Fischer Jamie Fischer Jamie Fischer is a commerce writer for Real Simple. She has experience writing content for various digital publications including Parents, and is passionate about home, lifestyle, and beauty products. Real Simple's Editorial Guidelines Updated on August 02, 2024 Fact checked by Shereen Jegtvig Fact checked by Shereen Jegtvig Shereen Jegtvig is an author, fact-checker, and expert with over two decades of experience in health and wellness within the lifestyle space. Our Fact-Checking Process In This Article View All In This Article Our Top Picks Reviews Final Verdict Our Testing Process How to Shop More to Consider FAQs Take Our Word for It What Is Real Simple Selects? Photo: Real Simple / Dera Burreson When the humidity drops too high or too low, it can contribute to asthma, allergies, dry skin, and more, which is why managing the moisture levels in your home is so important to improve air quality. A humidifier helps to keep an optimal humidity level in your home and can even provide a better night’s rest by improving sleeping conditions for adults and babies alike. We tested over 56 of the best humidifiers in our Des Moines lab and in our homes, evaluating them on effectiveness, noise level, design, size, ease of cleaning, and overall value. We also spoke with Melanie Carver, chief mission officer at the Asthma and Allergy Foundation of America (AAFA), to learn about the effects of humidity on asthma and allergies, as well as what features to look for in a humidifier. Our Top Picks Best Overall Ultrasonic: Levoit Dual 150 Ultrasonic Cool Mist Humidifier at Amazon $44 Jump to Review Best Overall Evaporative : Honeywell Cool Moisture Humidifier at Amazon $80 Jump to Review Best Budget: Magictec Cool Mist Humidifier at Amazon $21 Jump to Review Best Splurge: Dyson Purifier Humidify + Cool Autoreact at Amazon $650 Jump to Review Best for Bedrooms: SALE Vicks 3-in-1 SleepyTime Humidifier at Amazon $50 $34 Jump to Review Best for Large Rooms: SALE Everlasting Comfort Cool Mist Humidifier at Amazon $93 $59 Jump to Review Best for Nurseries: Pure Enrichment PureBaby Cloud Humidifier at Amazon $80 Jump to Review Best Whole Home : AprilAire 600 Whole-House Humidifier at Amazon $275 Jump to Review Best Portable: Geniani Erie Portable Small Cool Mist Humidifier at Amazon $27 Jump to Review Best Smart: Levoit OasisMist Smart Humidifier at Amazon $90 Jump to Review Best Overall Ultrasonic Levoit Dual 150 Ultrasonic Cool Mist Humidifier PHOTO: Amazon $44 at Amazon $35 at Walmart View on Levoit.com What Stands Out It’s quiet and doesn’t have a display light, so it won’t disrupt your sleep. What Could Be Improved It isn’t very effective on the low setting. Ultrasonic humidifiers are known for providing a quiet mist, and this sleek and simple model received high marks across the board in our testing. The two-in-one design functions as both a diffuser and humidifier, enabling you to create your own at-home spa experience with essential oils. We were particularly impressed by the humidifier’s quiet operation during testing—we couldn’t hear it at all when we were just over a foot away from it. One thing to keep in mind is that we didn’t find this humidifier to be effective on the low setting. It was very effective on the high setting, though, increasing the humidity levels by an average of 39%. For this, we recommend only using it on the higher one. We found the humidifier easy to use and clean. The dial is intuitive, and while there is no display light to indicate whether the device is on or not, we could see and feel the mist. Because it’s quiet and lacks a display light, we believe this humidifier would be non-disruptive if left on throughout the night. After using the humidifier for six months, it still functioned as well as it did at the beginning of our testing. We appreciate the convenient open-top design, which allows for a spill-free filling process. After removing the lid, there was no limescale or mold buildup of any kind, and the fragrance of the essential oils kept the device smelling fresh, as well. We didn’t love that the water line was difficult to see, but that was a minor issue. Though this humidifier may not have the bells and whistles of more advanced models, it certainly gets the job done. Type: Ultrasonic | Size: 7.2 by 8.1 by 11.6 inches | Weight: 3 pounds | Water Tank Capacity: 3 liters | Run Time: Up to 25 hours on low | Essential Oil Tray: Yes Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Best Overall Evaporative Honeywell Cool Moisture Humidifier PHOTO: Amazon $80 at Amazon $80 at Walmart View on Honeywellpluggedin.com What Stands Out It doesn’t produce a visible mist. What Could Be Improved You have to replace the filter regularly. Evaporative humidifiers use a fan to pull in air and blow it through a wick filter, which causes the water in the tank to evaporate quickly and turn into water vapor. This water vapor is then released into the air in the form of an ultra-fine, nearly undetectable mist. Our favorite evaporative humidifier, the Honeywell Cool Moisture Humidifier, increased the humidity by an average of 33% on the highest setting and 24% on the lowest setting in eight hours, all without creating any visible mist. It won’t disperse minerals commonly found in tap water into the air, either, because it has a filter. Just keep in mind that the filter will require replacement every 30 to 60 days, depending on whether you have hard or soft water. Because evaporative humidifiers require an internal fan to run, they’re usually louder than their ultrasonic counterparts. Fortunately, we found this evaporative humidifier to be both effective and quiet, so much so that we’d even recommend it for use in the bedroom or in a nursery, particularly when used on the lowest setting. After using the humidifier for six months, it continued to maintain its quality and performance. We were particularly impressed by the ease of cleaning—the transparent tank was easy to remove and fill, and the 1.1-gallon capacity can run for up to 24 hours without needing a refill. Plus, all the parts that come in contact with water are dishwasher safe, making it simple to sanitize. Type: Evaporative | Size: 17.9 by 9.3 by 11.4 inches | Weight: 8.4 pounds | Water Tank Capacity: 1 gallon | Run Time: Up to 24 hours | Essential Oil Tray: No Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Best Budget Magictec Cool Mist Humidifier PHOTO: Amazon $21 at Amazon What Stands Out It’s compact and blends seamlessly into its surroundings. What Could Be Improved It may develop an odor over time if not cleaned properly. Some humidifiers are pricier than others, but the Magictec Cool Mist Humidifier proves you don't have to sacrifice quality for cost. Immediately upon turning on this humidifier, a visible mist appeared and the white indicator light switched on to signal that the machine was in use. The ultrasonic operation was practically silent, and there was no leaking or puddling. We particularly loved the nozzle sprayer attachment that allows you to direct the flow of the mist to where it’s needed most. The indicator light turns red and the unit goes into standby mode when the water is running low. Once it has run out of water entirely, it automatically shuts off. Despite being compact enough to slide onto a shelf or side table, this humidifier has an impressive 24-hour run time. We found the setup to be very easy; however, cleanup proved a little more difficult. The reservoir’s opening wasn’t big enough to fit our hands, so it required a brush to clean it out. Although this humidifier doesn’t feature fancy extras like a digital display, smart device compatibility, or a humidistat, it still outperformed many higher-priced models in terms of effectiveness and design. Over six months, the humidifier has helped in alleviating dry skin and sinus problems, although we have noticed a bit of a ripe smell coming from the tank, so regular cleaning is a must. If you’re looking for an inexpensive humidifier that can blend into small to medium spaces while still delivering powerful results, this one more than fits the bill. Type: Ultrasonic | Size: 7 by 6 by 10 inches | Weight: 2.31 pounds | Water Tank Capacity: 85 ounces (about 0.66 gallons) | Run Time: Up to 24 hours | Essential Oil Tray: No Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Best Splurge Dyson Purifier Humidify + Cool Autoreact PHOTO: Best Buy $650 at Amazon $800 at QVC View on Hsn.com What Stands Out The three-in-one humidifier also acts as a fan and air purifier. What Could Be Improved It’s pretty large and heavy, so it may take up a prominent amount of space. With the name Dyson attached to it, you know it’s going to be a multifunctional and sleek device with many advanced features—and that's exactly what the Purifier Humidify + Cool Autoreact is. This three-in-one unit releases clean, humidified air throughout the room to simultaneously purify, humidify, and cool (or you can go without cooling by setting it to the Backwards Airflow setting, which directs airflow through the back of the unit). After eight hours of continuous running, it was able to increase the humidity of our space by an average of 8.4% on the lowest setting and 18% on the highest setting. This isn’t as high as some of the lesser-priced models on our list, but to be fair, those models don’t double as fans or air purifiers. On auto mode, the humidifier automatically senses and reports the air quality and humidity level and adjusts accordingly, while the night mode runs on the quietest setting and dims the display so as to not disturb sleep. We particularly like the oscillation, which circulates the newly purified and humidified air throughout a large room. Do keep in mind that this unit stands at 3 feet tall, meaning it's best suited for larger rooms where it can be kept on the floor. Dyson also manages to make cleanup easy with an automated deep clean cycle that eliminates mineral buildup and odors. The 1-gallon tank can run for up to 36 hours without needing a refill and comes with tiny wheels so you can easily wheel it to and from the faucet—though we did have some trouble with the tank leaking once it was removed from the unit. It also comes with a remote that attaches to the main unit for storage. After using the device for six months, it continued working up to our standards. We particularly enjoyed using the fan function in warmer weather, as it made our space far less stuffy. In short, this is a worthy investment piece that effectively replaces three appliances in one. Even so, its size and price may be overkill for those who only use humidifiers seasonally or don’t need the additional functionality. Type: Evaporative | Size: 12.3 by 11 by 36.6 inches | Weight: 18 pounds | Water Tank Capacity: 1 gallon | Run Time: Up to 36 hours | Essential Oil Tray: No Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Best for Bedrooms Vicks 3-in-1 SleepyTime Humidifier PHOTO: Amazon $34 at Amazon $34 at Target $34 at Walmart What Stands Out It acts as a humidifier, essential oil diffuser, and night light, so it’s perfect for creating a calmer bedroom atmosphere. What Could Be Improved Since the tank is small, you may have to refill it often. Despite being one of the smaller humidifiers we tested, this unit stood out as one of the highest performers in terms of output. The three-in-one device functions as a humidifier, essential oil diffuser, and color-changing night light all in one, adding a soothing touch to any bedtime routine. We found the vapor pods to be more potent than typical essential oils, creating a relaxing scent in our space. Its compact and sleek design blends in well with any surroundings, allowing for easy integration into bedroom decor without drawing too much attention. The small yet mighty humidifier has a capacity of 0.6 gallons and was able to increase the humidity by 51% within a 2-foot range and 37% within a 10-foot range after running on the highest setting for eight hours. However, it’s worth noting that after this time period, only about 0.5 cups of water remained in the tank, so make sure you’re prepared for frequent refills. While the limited capacity may be frustrating for those who want to use the humidifier for extended periods of time, it makes up for it in convenience—the portable size comfortably fits on a nightstand or bedside table and allows for easy transport from room to room. It also features a 180-degree rotating mist nozzle, which allows you to target the mist toward specific areas. We found the humidifier incredibly easy to clean, with the process taking only five minutes. The large tank opening facilitates easy filling, but since the tank is opaque, we felt it was a bit difficult to gauge its fullness, leading to occasional overfilling. The container cap also takes up a few centimeters of the tank, so you should take that into account when filling, as well. The humidifier produced a thick cloud of mist on the highest setting and accumulated some condensation on the nozzle. After six months of use, this humidifier continued to exceed our expectations. With its calming colors and the ability to release soothing fragrances, we believe this humidifier is a great pick for a bedroom. It emitted the same hum on both low and high settings, which can potentially serve as white noise for sleep. Plus, its reasonable price adds to its value. Type: Ultrasonic | Size: 8.15 by 8.6 by 8.23 inches | Weight: 3.5 pounds | Water Tank Capacity: 0.6 gallons | Run Time: Up to 24 hours | Essential Oil Tray: Yes Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Best for Large Rooms Everlasting Comfort Cool Mist Humidifier PHOTO: Amazon $59 at Amazon $129 at Wayfair $59 at Walmart What Stands Out It can run for a long period of time without needing to be refilled. What Could Be Improved It lacks the bells and whistles of more advanced models. When tackling a large space, finding a humidifier with expansive reach is essential. The Everlasting Comfort Ultrasonic Cool Mist Humidifier boasts an impressive 1.6-gallon capacity that can run for 50 continuous hours. In our testing, a whopping 49% of the water remained in the tank after eight hours. Due to its substantial capacity, you’ll hardly need to refill it, allowing it to operate effortlessly for extended periods. We value this unit’s simplicity, effectiveness, and how little maintenance it requires. You can adjust the humidity with a simple knob, eliminating the need for any confusing dials or buttons. While it lacks the bells and whistles of some more advanced models, we appreciate the intuitive design. The humidifier includes a convenient cover that lifts for easy refilling, though we observed that the cover, while intended to be helpful, was prone to leakage. It also features a 360-degree rotating nozzle, which allows you to aim the mist at the desired angle. Plus, it’s filterless, so you don’t have to worry about replacing or cleaning the filter. The manufacturer highlights the humidifier’s ability to cover up to 500 square feet, making it ideal for large living spaces. In our testing, the humidifier increased the humidity of our space by an average of 8% on the high setting from 10 feet away. We found the lowest and highest setting to be quite comparable, with the low setting being somewhat too powerful for small spaces. While we wish we had more control over the output, this certainly wasn't a deal breaker. In addition to its strength, we were pleasantly surprised by how quiet the humidifier was in our testing. The soft bubbling sound proved non-disruptive, even on the highest setting. After two months of of use, we already noticed many improvements—our skin felt less dry, our eyes felt less itchy, and our clothes had less static. Overall, this is the perfect choice for large spaces and especially dry climates. Type: Ultrasonic | Size: 11.42 by 6.69 by 13.27 inches | Weight: 3.1 pounds | Water Tank Capacity: 1.6 gallons | Run Time: Up to 50 hours | Essential Oil Tray: Yes Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Best for Nurseries Pure Enrichment PureBaby Cloud Humidifier PHOTO: Amazon $80 at Amazon $50 at Target $50 at Walmart What Stands Out The mist and nightlight can be used independently of one another. What Could Be Improved It has a small range and runs through water fairly quickly. If you have a little one at home, the Pure Enrichment PureBaby Cloud Ultrasonic Cool Mist Humidifier is an excellent addition to any nursery. Its fun cloud design adds a whimsical feel to your baby’s room, and the nightlight cycles through seven calming colors, bringing an extra playful touch to their nap time routine. If you aren’t in the mood for the cycle, a quick click can keep the humidifier on one constant color. We like that the light and mist operate independently of one another, allowing you to enjoy the glow even when you don’t want the humidity, or vice versa. You can control the humidifier output by turning the mist knob, and the 360-degree rotating mist nozzle gives you full control over the mist direction. It also has an outer cover that rests over the water tank, although this can make it tricky to monitor the water level. While the manufacturer claims the humidifier can cover up to 250 square feet, it fell a bit short in our testing. From 2 feet away, the humidity increased by an average of 4% on the high setting, and from 10 feet away, the hygrometer showed no increase. During the six-month testing period, we noticed that the humidity levels increased overnight, though it did accumulate a bit slower than with larger units. Given its limited range, we recommend keeping this humidifier in close proximity to your baby’s crib. The unit is designed to automatically shut off when water levels get too low, and the nightlight will blink three times as a warning. However, there wasn’t a maximum fill line on the tank, leaving us uncertain about where exactly to fill the water. The small device also ran through water fairly quickly, and we had difficulty monitoring when refills were needed. The cleaning process was exceptionally quick and easy, though, taking us approximately five minutes to disassemble, clean, and reassemble the device. While we had to flip the tank upside down to refill the water, we were pleasantly surprised that there was no mess involved. Type: Ultrasonic | Size: 9.8 by 5.6 by 6.8 inches | Weight: 2.2 pounds | Water Tank Capacity: 1.8 liters | Run Time: Up 15 hours on high, 24 hours on low | Essential Oil Tray: No Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Best Whole Home AprilAire 600 Whole-House Humidifier PHOTO: Amazon $275 at Amazon $305 at Walmart View on Sylvane.com What Stands Out It automatically monitors outdoor temperatures and includes a dial for easy adjusting. What Could Be Improved You may need to hire a professional for installation. While most humidifiers have a limited range, this model from AprilAire can easily cover the whole household. Its digital touch display is seamless, indicating the humidity percentage and when the water panel needs to be changed. This unit proved very effective during our testing, noticeably raising the humidity throughout our 4,000-square-foot space. From its silent operation to its continuous output, we consider this a “set it and forget it” appliance—once you program your desired humidity levels, it handles the rest. We particularly like that the humidifier automatically monitors the outside temperature to reduce condensation inside the windows. We also found it easy to adjust the humidity level using the dial or the connected app. In terms of maintenance, the humidifier doesn’t require much—just replace the water panel evaporator annually and remove any mineral buildup on the tray as needed. This pick is one of our favorites, and we have used it for over five years with no complaints. Our skin and nasal passages have felt much more hydrated, and even our dog is less itchy. Just keep in mind that you may want to consult a professional for installation. Type: Evaporative | Size: 15.4 by 10.3 by 15.8 inches | Weight: 10 pounds | Water Tank Capacity: 17 gallons | Run Time: 24/7 | Essential Oil Tray: No Best Portable Geniani Erie Portable Small Cool Mist Humidifier PHOTO: Amazon $27 at Amazon $28 at Walmart $28 at Geniani.com What Stands Out It’s practically silent, so it won’t be a distraction. What Could Be Improved You can’t control the mist output. This humidifier’s compact size and lighter weight allow it to go from the office to the home with ease. Plus, it’s small enough to fit in a cup holder and has a USB plug so you can even use it in the car during the dry winter months. For some of us, this little humidifier was even powerful enough to put a stop to frequent nosebleeds and congestion. The cool mist begins to appear within a few seconds of turning on the humidifier. It features two different settings—one for continuous mist and one for intermittent mist, meaning 10 seconds on and 10 seconds off. It also features an auto shut-off setting for when the water runs out. Aside from the above features, this humidifier has very few adjustable settings, which can be a good or bad thing depending on your needs. The intuitive one-button control makes it a great choice for a guest bedroom or car, but it also means that your control over the mist output is limited. We found this humidifier to be practically silent, and thanks to its eight-hour run time, you can keep it on your desk all day without it serving as a distraction. Setup and cleanup were both a breeze—the tank’s large, round opening is easy to clean without using a brush. Six months into using the humidifier, we noticed no significant changes in quality. If dry winter air has you wishing you could bring your humidifier with you everywhere, then this unit is your solution. Plus, it’s available in white or black to match any aesthetic. Type: Ultrasonic | Size: 2.6 by 4.9 by 3.7 inches | Weight: 10.8 ounces | Water Tank Capacity: 250 milliliters (about 0.006 gallons) | Run Time: Up to 8 hours | Essential Oil Tray: No Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Best Smart Levoit OasisMist Smart Humidifier PHOTO: Amazon $80 at Amazon $90 at Walmart View on Levoit.com What Stands Out You can schedule it to turn on and off according to your routine, and it’s incredibly easy to refill. What Could Be Improved It needs to be cleaned regularly, as we found that it collected a lot of bacteria. The Levoit OasisMist 450S Smart Humidifier is ideal for the busy individual, offering customizable experiences from anywhere at any time. By simply using your smartphone, you can effortlessly control the humidity in any room and schedule it to align with your daily routine. Given these remote capabilities, we consider this sleek humidifier to be a great pick for people who are constantly on the go. In our testing, the device increased the humidity by an average of 28% on the highest setting and 13% on the lowest setting after running for eight hours. The unit boasts an impressive vapor-to-water ratio, and we were amazed by how much water remained in the tank despite the large amount of vapor produced. We couldn’t believe how quiet the humidifier was, and we think it would be suitable for bedtime or other focus-intensive activities. It also allows you to add essential oils. Though you may expect the device’s high-tech features to be complex, using the humidifier proved to be extremely intuitive. You can select between the low, medium, and high settings by clicking the mist button—one light indicates the low setting, while three lights indicate the high setting. The filling process was seamless; the lid came off effortlessly, and the tank’s handle allowed us to easily remove it from the base. Thanks to the transparent tank, we were able to monitor how much water was left. One major con: After culturing the tank, we discovered that this humidifier held the most bacteria of any we tested. A film often formed around the base throughout our six months of use, though it was easy to wipe with a damp cloth. Still, considering its strong performance in all testing categories, we think this smart option would be a valuable addition to your household, as long as you’re willing to clean it regularly. Type: Ultrasonic | Size: 10.8 by 6.0 by 11.97 inches | Weight: 5.3 pounds | Water Tank Capacity: 1.19 gallons | Run Time: Up to 45 hours on low | Essential Oil Tray: Yes Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Best Stylish Vitruvi Cloud Humidifier PHOTO: Nordstrom $229 at Amazon $229 at Nordstrom $229 at Bluemercury.com What Stands Out You can control the output with the various touch-sensitive controls What Could Be Improved It’s a bit small given its price and may require frequent refills. By far the best-looking humidifier we’ve tested, the Vitruvi Cloud features a sleek, organically shaped design that seamlessly blends into its surroundings. But, more importantly, it was able to increase the humidity by an average of 30% after running for eight hours on its highest setting. You can use the touch-sensitive controls to choose between one of five mist levels, set a timer ranging from eight to 24 hours, or set it to night mode, which dims the display. We found the noise level to be consistent across all the mist levels, producing a quiet hum and trickling sound that was more soothing than disruptive (although those who are sensitive to any sound while sleeping may want to look elsewhere). It continued performing up to our standards, even after six months of use, with no noticeable changes in output or quality. Some of us even found this humidifier too effective to use on hot summer nights, so we recommend it for dry winter months. The Cloud comes with a 360-degree rotating mist spout that helps the compact humidifier reach more area. However, we would like to see a larger tank capacity for the price—at 1.5 liters, this is the second smallest tank on our list only behind the Geniani Erie Portable Small Cool Mist Humidifier. Fortunately, the removable tank is dishwasher safe, making it that much easier to sanitize. Despite the fact that this is an ultrasonic humidifier, this model does come with a water filter to capture minerals commonly found in tap water, so you don’t need to worry about using distilled water. (Vitruvi recommends you replace the filters every three months for best results.) It’s also available in three different neutral colors (white, oat, and dove) to complement any decor. Type: Ultrasonic | Size: 10.74 by 3.66-4.69 by 8.50 inches | Weight: 3.46 pounds | Water Tank Capacity: 1.5 liters | Run Time: Up to 24 hours | Essential Oil Tray: No Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Best Facial Hey Dewy Wireless Facial Humidifier PHOTO: Amazon $60 at Amazon View on Heydewy.com $60 at Revolve What Stands Out The compact, wireless design makes it easy to take on the go. What Could Be Improved Since it only has one unmarked button, it can be difficult to determine whether it’s on the intermittent or continuous setting. Dry winter air leads to dry skin, but this facial humidifier from Hey Dewy provides a solution to staying hydrated throughout the colder months. The unit is small, powerful, and straightforward to operate. With a single button, you can seamlessly switch between intermittent mist and continuous mist, making it incredibly easy to use. Due to the simplicity of the single button, however, there were times when we were unsure which setting we were on, requiring us to wait a few moments to see if the mist paused. Its portability makes it easy to travel with, and the wireless feature allows you to place it anywhere without being constrained by outlet limitations. We also appreciate the five fun colors it comes in, which make it more of a decorative self-care accessory than a clunky humidifier. The manufacturer recommends using tap water, which we found dispersed more effectively than distilled water. We think the humidifier is a bit pricey for its small size, and it certainly won’t humidify an entire room. Even so, the unit performed particularly well within a 2-foot range, increasing the humidity by an average of 21% when used for eight hours on the highest setting. It operated quietly, though the intermittent hissing may be annoying to some. The nozzle does occasionally get clogged, and the process of cleaning the spout and flipping the filter can be a bit tedious. Nevertheless, the humidifier maintained its impressive performance over six months of use. Overall, we think the chic, portable design and simplicity make it easy to incorporate into any self-care routine. Type: Ultrasonic | Size: 3 by 3 by 7 inches | Weight: 8 ounces | Water Tank Capacity: 11.3 ounces | Run Time: Up to 8 hours | Essential Oil Tray: No Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Most Sanitary Carepod One Humidifier PHOTO: Carepod $275 at Amazon $275 at Hellocarepod.com What Stands Out The cleaning process is easy and effective. What Could Be Improved It doesn’t have a filter, so you may want to opt for distilled water. Designed by a doctor, the Carepod One prioritizes health and sanitation. Unlike other humidifiers that require a tedious cleaning process, this one has a stainless steel interior that can be easily sanitized with boiling water. While the unit was a bit too large to fit in our standard pots or pans, we were able to pour boiling water over it, eliminating any uncertainty about the effectiveness of vinegar cleaning methods. Plus, this humidifier checks all of the boxes in terms of design, effectiveness, ease of maintenance, and ease of operation. With three mist settings, a built-in timer, and an oscillating arm, the humidifier offers just enough features to be functional without being overly complex. The stainless steel bowl can be effortlessly removed for spill-free filling, ensuring a no-mess process. According to the brand, this humidifier is suitable for spaces up to 500 square feet. From a 2-foot distance, the unit increased the humidity of our space by an average of 53% on the highest setting, and 27% from a 10-foot distance. After running the tank overnight for three days, we still had excess water left over. It continued performing well, even after using it for six months. The unit comes in one of the more expensive models we tested, which may feel unnecessary for those who plan to only use the device seasonally. That said, the filter-free design contributes to this cost, eliminating the need for filter replacements. But note that since it doesn’t have a filter, you may want to use distilled water to ensure purity. Type: Ultrasonic | Size: 10.14 by 10.72 by 9.2 inches | Weight: 8 pounds | Water Tank Capacity: 4 liters | Run Time: Up to 30 hours | Essential Oil Tray: No Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Real Simple / Henry Wortock Best With No Filter Vicks EasyCare+ TopFill Ultrasonic Humidifier PHOTO: Amazon $60 at Amazon $60 at Walgreens $62 at CVS What Stands Out It has an effective output and wide reach on the high setting. What Could Be Improved There is a vast performance disparity between the low and high settings. Filters can be annoying to change and even more annoying to clean. For those who want to avoid the hassle, this filter-free humidifier from Vicks is easy to use, fill, and maintain. The humidifier features a large opening and removable tank, allowing you to fill it either from the top or the side. Its convenient handle also makes it easy to bring from room to room. Despite its compact size, this humidifier proved highly effective in our testing. From 2 feet away on the high setting, the humidity increased by an average of 37%, and from 10 feet, it increased by an average of 42% after running for eight hours. Even when sitting over 10 feet away from the humidifier, we felt a change within 30 minutes on the high setting. This strong output was a vast contrast from the lower setting, though. After using the humidifier for three hours on low, the humidity was hardly noticeable, and only about 0.5 cups of water had been used up. While we found the humidity less pronounced on the lower setting, we were still able to detect the fragrant essential oils. After six months of use, we noticed no changes in quality or performance. Operating very quietly on both high and low, the humidifier exhibited minimal noise difference between the two settings. The clear tank allows for easy monitoring of the water level, while the knob enables you to control the mist output. Keep in mind that this unit may not be as aesthetically pleasing as other models, so if you’re looking for a more sleek design, you may want to explore other options. Despite its appearance, we appreciate how easy it was to operate and clean. Type: Ultrasonic | Size: 8.6 by 8.6 by 8.5 inches | Weight: 3.3 pounds | Water Tank Capacity: 0.6 gallons | Run Time: Up to 24 hours | Essential Oil Tray: Yes Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Best Warm and Cool Mist Vicks Dual Comfort Cool + Warm Mist Humidifier PHOTO: Amazon $95 at Amazon View on Pcrichard.com What Stands Out Its cooling and warming capabilities make it ideal for year-round use. What Could Be Improved Due to the heating element, it may not be ideal for households with kids or pets running around. Both warm and cool mist humidifiers are effective at adding moisture back into the air, but cool mist humidifiers can add a bit of a chill to the room, while warm mist humidifiers can keep you more comfortable during the colder months. A humidifier that offers both warm and cool mist is ideal for year-round use, providing the option to adapt your settings seasonally. The Vicks Dual Comfort humidifier performed well in our testing, as it was able to increase the humidity level of the room by 40% after running continuously on the highest setting for eight hours. While the high setting impressed us with its power, we did notice a large disparity between the highest and lowest settings, as the latter only increased the humidity by 7% after eight hours. We appreciate the humidifier’s dual rotating nozzles, which allow you to direct the mist where it’s most needed. Even after using it for six months, it was performing just as well as it had when we first got it. We didn’t have any issues with hot steam spurting from the unit, although we still recommend exercising caution with warm mist humidifiers, especially if you have kids or pets nearby. This humidifier can also be used in conjunction with Vicks VapoSteam or VapoPads to create a medicated steam for relieving cold symptoms, or you can add essential oils for a more ambient experience. Do keep in mind that cleanup requires that you use the included brush (which is stored neatly under the tank) to get into the nooks and crannies. Type: Ultrasonic | Size: 10.1 by 10.1 by 14.7 inches | Weight: 8 pounds | Water Tank Capacity: 1.2 gallons | Run Time: 36 hours | Essential Oil Tray: Yes Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Real Simple / Dera Burreson Final Verdict If you’re looking for an ultrasonic humidifier, the best option is the Levoit Dual 150 Ultrasonic Cool Mist Humidifier because of its intuitive controls, silent operation, and budget-friendly price. Plus, the two-in-one model functions as both a humidifier and an essential oil diffuser. If you prefer an evaporative humidifier, we recommend the Honeywell Cool Moisture Humidifier, which produces a barely detectable mist and is very easy to use. Real Simple / Dera Burreson Our Testing Process We put 56 of the best humidifiers through a series of tests both in our Des Moines lab and in our homes to determine which ones are worth buying. First, we evaluated the setup of each humidifier by timing how long it took to assemble straight out of the box. We also filled the water tank to capacity with distilled water, noting how heavy the tank was when full. Once the water tanks were full, we measured the effectiveness of each humidifier by running them continually for eight hours both on the highest and lowest setting, and used a hygrometer to record the humidity level of the room before and after running the humidifier. We also took note of how loud each unit got, including whether it produced any humming, whistling, or crackling noises. Once the humidifiers were done running, we inspected the area around them to check for any visible puddling or leaking. We also evaluated the design and size of each humidifier, including whether it blends in well with its surroundings, how much room it takes up, whether the cord is long enough to reach the outlet, how user-friendly the display is, whether it includes any smart features, its water tank capacity, its run time, and more. After each use, we emptied and cleaned the tank, evaluating how easy it was to clean, including whether or not it was dishwasher-safe. Finally, we rated the overall value of each humidifier, considering whether the performance justified the price. Once lab testing was complete, we brought the humidifiers home and tested them over six months to evaluate how well they held up to daily use. Real Simple / Henry Wortock How to Shop for Humidifiers Like a Pro Cool Mist vs. Warm Mist Most of the humidifiers we tested—and most on the market today—are cool mist humidifiers, meaning they release room-temperature mist into the air. They make a great choice for those with kids or pets because there isn't a risk of burns in the event of a spill. Cool mist humidifiers are also more versatile because they can be used year-round without overheating your space during the warmer months. And because the water doesn't need to be heated, cool mist humidifiers typically use less energy, too. The best warm mist humidifiers are just as effective at humidifying air, but unlike cool mist humidifiers, they have an internal heating element that boils the water before releasing it. You may choose to go with a warm mist humidifier during the winter months as part of your winter skincare routine. Fortunately, you can find humidifiers with both cool and warm mist settings, such as the Vicks Dual Comfort Cool + Warm Mist Humidifier, our favorite humidifier with both warm and cool mist. Ultrasonic vs. Evaporative Depending on how they produce moisture, most cool mist humidifiers fall into one of two camps: ultrasonic or evaporative. Ultrasonic humidifiers produce a cool mist by using high-frequency sound vibrations from two ceramic plates. Evaporative humidifiers feature an internal fan that pulls in air and blows it through a wick filter, causing the water to evaporate and expel into the room in the form of a very fine, sometimes undetectable mist. Ultrasonic humidifiers tend to have a quieter operation (because there’s no internal fan), and they don’t have a filter to replace. However, they have more of a tendency to disperse contaminants into the air, such as minerals commonly found in tap water. You can combat this by using distilled water and regularly cleaning your humidifier. (Although, the Vitruvi Cloud Cool Mist Humidifier is an ultrasonic humidifier with a water filter to trap contaminants found in tap water.) In general, ultrasonic humidifiers tend to be more expensive than their evaporative counterparts. Size and Capacity Different humidifiers are intended for different room sizes, with the tank size generally acting as an indicator of how much space a unit can humidify. In general, humidifiers for small to mid-sized rooms tend to hold less than about one gallon of water, while the best humidifiers for a large room will require a bigger tank capacity. Keep in mind that you may need to carry the tank to and from the sink to fill it, so you’ll want to be sure it’s comfortable to handle and not too heavy. You'll also want to consider whether you plan to move your humidifier from room to room or keep it in one room at all times. If portability is a factor, consider the weight of the machine. Additionally, manufacturers will usually list the run time of a machine, which is an estimate of how often you'll need to refill the tank. This is closely related to the tank size and thus, the size of the room you'll be able to humidify. For humidifiers with longer run times, an auto shut-off setting can be helpful: These will either shut off the unit when it runs out of water or use a humidistat to measure the room's humidity and then turn off the machine when the room reaches the desired level. Real Simple / Dera Burreson Noise A quiet humidifier will hover around 30 decibels, about as loud as a whisper, according to the CDC. Evaporative models tend to be louder than their ultrasonic counterparts because of their internal fan. If you’re purchasing a humidifier for a bedroom or nursery, you’ll want to keep this in mind when shopping. Cleanup Cleaning your humidifier at least once a week is imperative to prevent bacteria growth that can be expelled into the air. To make this process easier, look for a unit that's easy to disassemble and a water tank that's easy to clean. Real Simple / Dera Burreson More Humidifiers to Consider Crane Warm & Cool Mist Top Fill Humidifier: This humidifier stood out to us due to its convenient display panel, which allowed us to toggle between various settings with ease. It did take a bit of time for the warm mist to come out, though. Homedics TotalComfort Ultrasonic Humidifier: If you’re looking for a budget-friendly yet effective option, this simple model was able to increase the humidity of our space by 26% from two feet away on the highest setting. We did take off points for the confusing instructions and the messy refill process, which resulted in water seeping out. Real Simple / Dera Burreson Questions You Might Ask How do humidifiers work? Humidifiers work by adding moisture to the air in the form of mist or water vapor. Their mechanism for doing this can vary depending on whether they are ultrasonic or evaporative and cool mist or warm mist. All humidifiers return moisture to the air to help with dry skin, nasal congestion, temperature control, and more. “Humidifiers can help keep the relative humidity in a comfortable range while helping to keep asthma and allergy triggers at bay,” Carver says. What are the benefits of using a humidifier? Humidity refers to the amount of water vapor in the air, and humidifiers produce water vapor or steam to introduce moisture into the indoor environment. Just keep in mind that humidity has varying effects depending on its level. "High humidity causes the air to feel warmer than it actually is and can cause you to overheat," Carver says. She adds that it also encourages the growth of dust mites and mold, both of which thrive in humidity levels above 50% and can trigger asthma and allergies. Despite these drawbacks, Carver warns that low humidity has its risks, too. "Low humidity can cause your skin, eyes (including your eyelids), nose, and lips to dry out," she says. "It can also result in a dry, sore throat, as well as worsen eczema and asthma." If you're struggling to achieve that middle ground, don't worry. Using a humidifier can help curb these symptoms by introducing moisture into your space. Many parents also choose to purchase a humidifier for a baby’s nursery, because it can help with nasal congestion and provide a soothing environment for sleeping. Humidifiers can also provide several benefits for your home, too. Certain houseplants thrive in humid conditions. Plus, a constant level of moisture can prevent wood furniture and wallpaper from cracking. When are the best times to use a humidifier? Depending on where you live, humidifiers can have benefits in both the summer and winter months.The EPA recommends an indoor humidity level between 30 and 50% to prevent the spread of viruses and indoor air pollutants. According to Carver, the humidity levels in your home can be affected by the climate you live in, your home’s air ventilation, and your indoor activities. During the winter months, especially in dry climates, humidity levels can dip below 30%—so when temperatures drop, it’s the ideal time to run your humidifier. However, constantly running your AC unit during the summer months can remove moisture from the air too, so you may choose to run it year-round. If your humidifier does not feature a humidistat, Carver suggests purchasing a low-cost hygrometer to monitor your home’s humidity level. When it comes to the time of day, many people choose to run their humidifiers at night. Not only does this provide ambient noise for sleeping, but it also helps alleviate the symptoms of dry air or allergies, including congestion or a dry throat. Can you use tap water in a humidifier? Unless the manufacturer explicitly states to use filtered or distilled water in your humidifier, it's generally OK to use tap water. However, if you're using tap water in an ultrasonic humidifier, and especially if you have hard water, you may notice a fine white dust being expelled out of your humidifier. These are minerals from the tap water that have broken down, leaving behind a white dust once the water evaporates. Although this dust is harmless (unless you are sensitive to dust particles), it can begin to collect on your furniture, walls, and floors. To combat this, you can switch to filtered or distilled water or opt for an evaporative humidifier, which uses a filter to trap minerals before the water is released into the air. "Using filtered water and changing the water daily will also help prevent mold or bacteria from growing in your humidifier," Carver says. Take Our Word for It This article was written by Melanie Fincher, associate commerce editor for Real Simple with three years of experience writing product reviews and lifestyle content, and Jamie Fischer, a commerce writer for Real Simple. To come up with this list, we tested 56 humidifiers both in our lab and in our homes. Melanie and Jamie spent hours evaluating testing insights, considering factors like setup, effectiveness, design, size, maintenance, and overall value. For expert tips on what to look for in a humidifier, we consulted Melanie Carver, chief mission officer at the Asthma and Allergy Foundation of America. What Is Real Simple Selects? Next to each product on this list, you may have noticed a Real Simple Selects seal of approval. Any product appearing alongside that seal has been vetted by our team—put through tests and graded on its performance to earn a spot on our list. Although we buy most of the products we test, sometimes we do get samples from companies if purchasing a product ourselves isn’t an option. All products go through the same rigorous process, whether they are purchased or sent by the company. Love our recommendations? Check out more products that have earned the Real Simple Selects, from humidifiers to cordless vacuums.