Top 5 Humidifiers For Large Rooms: Buyer’s Guide

Does the air in your large living space feel dry and uncomfortable, especially during the winter months? You are not alone. Big rooms demand big solutions when it comes to managing humidity. A small, standard humidifier simply cannot handle the vast space, leaving you with dry skin, irritated sinuses, and static electricity zaps.

Choosing the right humidifier for a large area presents unique challenges. You need power, coverage, and efficiency, but the market is flooded with confusing specifications. How do you know which machine can truly keep a spacious room perfectly balanced? Understanding the difference between ultrasonic, evaporative, and cool mist models becomes crucial when you are dealing with square footage.

This detailed guide cuts through the confusion. We will break down the key features you must look for in a high-capacity humidifier. By the end of this post, you will know exactly which type of unit can transform your big room into a haven of perfect, comfortable moisture. Let’s dive in and find the ideal powerhouse humidifier for your space.

Top Humidifier For Big Room Recommendations

No. 1
LEVOIT OasisMist 1000S (10L) Smart Humidifier for Home Large Room Bedroom, Last 100 Hours Suitable for Indoor Plant, Cover up to 600ft², Easy Top Fill, Remoter & Voice Control, Auto Mode, Quiet, White
  • 𝙎𝙪𝙥𝙚𝙧-𝙡𝙤𝙣𝙜 100 𝙃𝙤𝙪𝙧𝙨, 𝙀𝙣𝙘𝙤𝙪𝙣𝙩𝙚𝙧 𝙔𝙤𝙪𝙧 𝙊𝙖𝙨𝙞𝙨: Maximize your time and minimize refills with the humidifier's extended 100-hour runtime, allowing you to focus on what you love
  • 𝙎𝙥𝙖𝙘𝙚-𝙎𝙖𝙫𝙞𝙣𝙜, 𝙀𝙭𝙩𝙚𝙣𝙨𝙞𝙫𝙚 𝙃𝙪𝙢𝙞𝙙𝙞𝙛𝙞𝙘𝙖𝙩𝙞𝙤𝙣: Humidify up to 600 ft² with more than 5 feet of mist height and a 350mL/h mist volume for thorough humidity throughout the room
  • 𝙀𝙛𝙛𝙤𝙧𝙩𝙡𝙚𝙨𝙨 𝙎𝙢𝙖𝙧𝙩 𝘾𝙤𝙣𝙩𝙧𝙤𝙡: With the Vesync App, set schedules according to your routines, and customize humidity for your family. Create your personalized humidification plan
  • 𝙎𝙥𝙖𝙘𝙞𝙤𝙪𝙨 𝙏𝙤𝙥 𝙁𝙞𝙡𝙡 𝙊𝙥𝙚𝙣𝙞𝙣𝙜: One-step water refills, no heavy lifting required. Prevents spills and eases cleaning with a wide opening
  • 𝘼𝙡𝙡-𝘿𝙖𝙮 𝙑𝙚𝙧𝙨𝙖𝙩𝙞𝙡𝙞𝙩𝙮: Auto Mode runs seamlessly during your family interactions, Plant Mode enhances plant care, Aroma Mode soothes nerves during workouts, and Sleep Mode for peaceful rest
No. 2
Humidifier Large Room Bedroom with Night Light, 2.1Gal(8L) Humidifiers for Home with Essential Oil Diffuser, Top Fill Whole House Cool Mist Humidifiers for Plants Baby Kids Adults(Black)
  • [𝗟𝗮𝗿𝗴𝗲 𝗖𝗮𝗽𝗮𝗰𝗶𝘁𝘆 & 𝗟𝗲𝗮𝗸𝗮𝗴𝗲 & 𝗧𝗼𝗽 𝗙𝗶𝗹𝗹𝗶𝗻𝗴 𝗗𝗲𝘀𝗶𝗴𝗻] Our humidifier boasts a removable 8L (2.1Gal) large capacity tank, featuring a top-filling design that eliminates leakage issues and simplifies the refilling process. With a single refill, it can continuously run for up to 40 hrs. The high moisture output of 300mL/h is designed to humidify an area of up to 800 sq.ft, the best choice for whole-house humidification, suitable for home, dorms, and living rooms.
  • [𝟯 𝗦𝗽𝗲𝗲𝗱 𝗢𝗽𝘁𝗶𝗼𝗻𝘀 & 𝗜𝗻𝘁𝗲𝗹𝗹𝗶𝗴𝗲𝗻𝘁 𝗛𝘂𝗺𝗶𝗱𝗶𝘁𝘆 𝗖𝗼𝗻𝘁𝗿𝗼𝗹] The large humidifier offers 3 mist levels (low/medium/high) for you to choose from. The intelligent humidity control feature allows you to customize the humidity level between 45-95% in 5% increments. Equipped with a humidity sensor, the mist output will automatically shut off when the preset humidity level is reached and will resume when it falls below your desired humidity level. Note: The recommended indoor humidity range is 45% to 60%.
  • [𝗡𝗶𝗴𝗵𝘁 𝗟𝗶𝗴𝗵𝘁𝘀 & 𝗦𝗹𝗲𝗲𝗽 𝗠𝗼𝗱𝗲 & 𝟭𝟮-𝗛𝗼𝘂𝗿 𝗧𝗶𝗺𝗲𝗿] Our bedroom humidifier comes with a night light feature creating a relaxing ambiance for better sleep. The baby humidifier operates at a noise level lower than 35dB and can be switched to sleep mode. Sleep mode turns off all lights, allowing it to humidify the bedroom without disturbing your sleep. The 12-hour timer function allows you to set the running period as you like, and you can control the humidifier via remote or touch for added convenience.
  • [𝗘𝘀𝘀𝗲𝗻𝘁𝗶𝗮𝗹 𝗢𝗶𝗹 𝗧𝗿𝗮𝘆 & 𝟯𝟲𝟬° 𝗡𝗼𝘇𝘇𝗹𝗲] Simply add 1-2 drops of your favorite essential oils to the tray located at the back, and enjoy the delightful fragrance. The 360° rotating nozzle enables you to adjust the mist flow direction as per your needs. The humidifier also includes automatic shutdown when it reaches the custom humidity level or when there is no water, ensuring safety and preventing damage. It is also designed with a detachable water pump and suction pipe for low-cost maintenance.
  • [𝗤𝘂𝗮𝗹𝗶𝘁𝘆 𝗦𝗲𝗿𝘃𝗶𝗰𝗲] Our ultrasonic cool mist humidifier does not require any replacement filters, reducing ongoing maintenance costs. It is perfect for use in offices, bedrooms, nurseries, plants, large rooms, and for pets. Our dedicated customer service team is available 24/7 and ready to assist you. We offer 360 days of free product replacement. Rest assured, we are here to support you with the best after-sales service.
No. 3
LEVOIT Top Fill Humidifiers for Bedroom, 2.5L Tank for Large Room, Easy to Fill & Clean, 28dB Quiet Cool Mist Air Humidifier for Home Baby Nursery & Plants, Auto Shut-off for Safety, 25H
  • 𝙁𝙖𝙨𝙩 𝙃𝙪𝙢𝙞𝙙𝙞𝙛𝙞𝙘𝙖𝙩𝙞𝙤𝙣 𝘼𝙡𝙡 𝙉𝙞𝙜𝙝𝙩: Runs for up to 25 hours on low thanks to its SUPER LARGE capacity of 2.5 liters. The soothing moisture helps quickly relief congestion and dry throat.
  • 𝙀𝙖𝙨𝙮 𝙏𝙤𝙥-𝙁𝙞𝙡𝙡 𝘿𝙚𝙨𝙞𝙜𝙣: LEVOIT listened to feedback from humidifier customers and upgraded to a easy top-fill design. No need to turn the water tank over or spilling water all over the place. Just ONE-STEP to remove the cover and easily fill the tank.
  • 𝙈𝙪𝙘𝙝 𝙀𝙖𝙨𝙞𝙚𝙧 𝙛𝙤𝙧 𝘾𝙡𝙚𝙖𝙣𝙞𝙣𝙜: Easily clean the inside of the tank through its big opening. The detachable designs and simple construction of the base leaves no hard-to-reach corners when cleaning. Maintaining health has never been this easy.
  • 𝙉𝙤 𝘿𝙞𝙨𝙩𝙪𝙧𝙗𝙖𝙣𝙘𝙚 𝙒𝙝𝙚𝙣 𝙎𝙡𝙚𝙚𝙥𝙞𝙣𝙜: The Classic 160 cool mist humidifier is perfect for sleeping, with noise level as low as 26dB and all lights off. Helps create a peaceful and quiet atmosphere The perfect humidifier for bedrooms and baby nurseries.
  • 𝘾𝙪𝙨𝙩𝙤𝙢𝙞𝙯𝙚 𝙔𝙤𝙪𝙧 𝙈𝙞𝙨𝙩: Customize the mist output with just one knob and adjust the direction freely with the 360 degree nozzle. Enjoy full control of your air humidifier
No. 4
LEVOIT Humidifiers for Bedroom Large Room Home, (6L) Cool Mist Top Fill Essential Oil Diffuser for Baby & Plants, Smart App & Voice Control, Rapid Humidification & Auto Mode - Quiet Sleep Mode, Gray
  • 𝙀𝙛𝙛𝙤𝙧𝙩𝙡𝙚𝙨𝙨 𝙍𝙚𝙡𝙞𝙚𝙛 𝙁𝙧𝙤𝙢 𝘿𝙧𝙮 𝘼𝙞𝙧: Designed for ultimate comfort, this humidifier effectively covers rooms up to 505 ft² with a powerful 300 mL/h mist output. Its 6 L tank allows up to 60 hours of quiet, continuous humidification
  • 𝘼𝙪𝙩𝙤 𝙈𝙤𝙙𝙚 𝙛𝙤𝙧 𝙎𝙢𝙖𝙧𝙩 𝙃𝙪𝙢𝙞𝙙𝙞𝙩𝙮: The built-in sensor prevents over-humidification by monitoring room moisture and adjusting mist output to maintain an ideal humidity level—perfect for kids' rooms and plants
  • 𝘼𝙡𝙡-𝙞𝙣-𝙊𝙣𝙚 𝘼𝙥𝙥 & 𝙑𝙤𝙞𝙘𝙚 𝘾𝙤𝙣𝙩𝙧𝙤𝙡: Use the VeSync app from anywhere to adjust mist output, set timers, and monitor humidity in real time. Connect with Alexa and Google Assistant for seamless voice control
  • 𝙒𝙝𝙞𝙨𝙥𝙚𝙧-𝙌𝙪𝙞𝙚𝙩 𝙊𝙥𝙚𝙧𝙖𝙩𝙞𝙤𝙣 𝙛𝙤𝙧 𝙋𝙚𝙖𝙘𝙚𝙛𝙪𝙡 𝘽𝙚𝙙𝙧𝙤𝙤𝙢𝙨: Featuring a quiet fan and ultrasonic technology, it operates with minimal disturbance. Ideal for bedtime routines, nurseries, or focused work. Noise Level: ≤ 30dB
  • 𝙀𝙖𝙨𝙮-𝙩𝙤-𝘾𝙡𝙚𝙖𝙣 𝙏𝙤𝙥-𝙁𝙞𝙡𝙡 𝘿𝙚𝙨𝙞𝙜𝙣: The unique top-fill water tank makes refilling easy and hassle-free, designed with no hard-to-clean corners for easy maintenance
No. 5
Dreo Humidifiers for Bedroom, 4L Top Fill for Large Room, 36H Runtime, 28 dB Quiet Supersized Cool Mist Air Humidifier for Baby Nursery, Plants, Indoor, Night Light, Easy to Clean & Fill, White
  • 𝟰𝗟 𝗟𝗮𝗿𝗴𝗲 𝗧𝗮𝗻𝗸 𝗳𝗼𝗿 𝗖𝗼𝗻𝘁𝗶𝗻𝘂𝗼𝘂𝘀 𝗖𝗼𝗺𝗳𝗼𝗿𝘁: Enjoy quiet sleep without congestion, coughing, or dry mouth, DREO baby humidifier's ultrasonic atomization brings noise down to 28dB, while its 4L tank provides up to 36 hours of moisture without the need to refill.
  • 𝗡𝗲𝘅𝘁-𝗚𝗲𝗻 𝗛𝘂𝗺𝗶𝗱𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲: Powered by DREO's Dual-intake and 4-inch mist outlet design, this humidifier for large room creates a supersized mist of up to 40 inches tall for humidifying bedrooms, while bringing faster dry air relief to help you breathe easy and healthy.
  • 𝗕𝗿𝗶𝗻𝗴 𝗙𝗿𝗲𝘀𝗵𝗻𝗲𝘀𝘀 𝗔𝗹𝗹-𝗮𝗿𝗼𝘂𝗻𝗱: Thanks to its high-frequency atomization process, DREO humidifiers for bedroom releases 5μm Ultrafine mist and lighter mist particles, allowing humidity to spread evenly across the room without wetting surfaces.
  • 𝗘𝗮𝘀𝘆 𝗧𝗼𝗽 𝗙𝗶𝗹𝗹 𝗗𝗲𝘀𝗶𝗴𝗻: This air humidifier allows you to fill up without having to flip the tank or spill water on the floor. Its modular design is easy to remove and install, giving you a hassle-free cleaning experience.
  • 𝟯-𝗶𝗻-𝟭 𝗛𝘂𝗺𝗶𝗱𝗶𝗳𝗶𝗲𝗿: DREO cool mist humidifiers are perfect companions for a healthier life, from helping you breathe easier, to making your own aromatherapy sessions, to changing the mood of your room with its ambient light (essential oils not included).
No. 6
BREEZOME 6L Humidifiers for Bedroom Large Room & Essential Oil Diffuser, Ultrasonic Top Fill Cool Mist Humidifiers for Baby, Plants, Nursery Last up to 60 Hours, Smart Humidistat Control, Quiet, Black
  • POWERFUL HUMIDIFICATION, PERFECT FOR BEDROOM & BABY ROOM: Our ultrasonic humidifier has a 6L (1.6 gallon) large tank that works great in large rooms up to 500 sq feet. It allows a long lasting humidification for up to 60 hours.
  • DIFFUSER & HUMIDIFIER 2 IN 1: Add your favourite essential oils to the built-in aromatherapy tray, the cool mist humidifier can mix your favourite aroma with the moist air and fill your room with relaxing aroma.
  • AUTOMATICALLY CONTROL THE HUMIDITY LEVEL: Our humidifiers for bedroom is designed with a intelligent humidistat which helps to maintain the pre-set humidity level and allows you to check the real time humidity level. Just setup your preferred humidity level and let our humidifier do the rest.
  • CONVENIENT TOP FILL DESIGN: Easily clean the water tank under running water with a detachable tank. It’s never been easier to maintain water in the tank. Just open the lid and directly add water into the working humidifier.
  • WHISPER-QUIET & SAFE: Designed with a quiet sleep mode, our humidifier can work in low noise to protect your undisturbed good sleep. It would automatically shut off when water runs out. Safe for you and your whole family.
No. 7
Dreo Smart Humidifiers for Bedroom, Top Fill 4L Supersized Humidifier Large Room with 28 dB, 36H Runtime, Touch/APP/Voice Control, Nightlight, Cool Mist Humidifiers for Baby, Plants, Indoor, Black
  • 𝐏𝐫𝐞𝐜𝐢𝐬𝐞 𝐀𝐮𝐭𝐨 𝐇𝐮𝐦𝐢𝐝𝐢𝐭𝐲, 𝐕𝐨𝐢𝐜𝐞 & 𝐀𝐩𝐩 𝐂𝐨𝐦𝐦𝐚𝐧𝐝: Stop guessing the right humidity. With enhanced sensing precision for more accurate auto control, this smart humidifier for bedroom auto-adjusts to your ideal humidity. Control mist, timer, and lights hands-free with Alexa/Google Voice or the DREO App—all while ambient lights visually cue you to room conditions.
  • 𝙋𝙤𝙬𝙚𝙧𝙛𝙪𝙡 𝙈𝙞𝙨𝙩 𝙛𝙤𝙧 𝙁𝙖𝙨𝙩𝙚𝙧 𝙍𝙤𝙤𝙢-𝙒𝙞𝙙𝙚 𝘾𝙤𝙫𝙚𝙧𝙖𝙜𝙚: Designed with Dreo’s Dual-Intake System, this cool mist humidifier delivers significantly stronger mist output than typical humidifiers, providing faster relief from dry air. Ideal for large rooms, bedrooms, and living spaces, especially during allergy season and dry winter months.
  • 𝐄𝐧𝐣𝐨𝐲 𝐀𝐥𝐥-𝐍𝐢𝐠𝐡𝐭 𝐂𝐨𝐦𝐟𝐨𝐫𝐭, 𝐍𝐨 𝐑𝐞𝐟𝐢𝐥𝐥𝐬 & 𝐍𝐨 𝐍𝐨𝐢𝐬𝐞: The 4L top-fill tank runs up to 36 hours, eliminating midnight refills. An advanced acoustic design keeps noise as low as 28dB, making it a perfect quiet humidifier for bedroom and baby nursery.
  • 𝙀𝙫𝙚𝙣 𝙃𝙪𝙢𝙞𝙙𝙞𝙛𝙞𝙘𝙖𝙩𝙞𝙤𝙣, 𝙉𝙤 𝙒𝙚𝙩 𝙎𝙪𝙧𝙛𝙖𝙘𝙚𝙨: Humidity that blankets the room evenly, not your furniture. Through high-frequency atomization, it releases a 5μm ultra-fine mist that disperses uniformly. Protect your wood floors, desks, and plants from moisture damage while enjoying perfectly balanced air.
  • 𝐎𝐩𝐭𝐢𝐨𝐧𝐚𝐥 𝐂𝐚𝐫𝐭𝐫𝐢𝐝𝐠𝐞𝐬 𝐟𝐨𝐫 𝐇𝐞𝐚𝐥𝐭𝐡𝐢𝐞𝐫 𝐌𝐢𝐬𝐭 & 𝐋𝐞𝐬𝐬 𝐌𝐚𝐢𝐧𝐭𝐞𝐧𝐚𝐧𝐜𝐞: Breathe the purest mist with minimal upkeep. Upgrade effortlessly with the Demineralization Cartridge (fights white dust) and Clean Mist Cartridge (for healthier humidity). The modular design spins off for easy cleaning, and an ICON light tells you when to refresh cartridges. (Search: Dreo Demineralization Cartridge / Dreo Clean Mist Cartridge)
No. 8
Homvana Humidifiers for Bedroom Home, 3.6 L Cool Mist Top-Fill 34H Super Long Time, Quiet 23dB, Baby Humidifier, Oil Diffuser for Large Room, House, Plant, Nursery, Office, BPA FREE, Ultrasonic (Grey)
  • [3-in-1 Humidifier Meets All You Expect] Cool Mist Humidifier+Aromatherapy+Mood Light, purchase for once to satisfy all you expect! Let Homvana H101 be the best companion in your bedroom.
  • [Unique SilentSpray, Undisturbed Sleep] The humidifier applies the display-off sleep mode and the exclusive SilentSpray tech to ensure noise less than 23dB. Those most sensitive babies can also sleep deep and soundly all night.
  • [100% Certified Safety] The humidifier gives all your family members the 0-Risk & BPA-free humidification. Furthermore, the Auto shut-off tech banishes all dry running or fire risks. Therefore, even for babies, it's perfect!
  • [Easy to Refill & Clean] The top-filling design which combines the detachable tank with the 5.3-inch wider opening, spares you from getting your table wet, making filling and cleaning as easy as a piece of cake.
  • [Soothing Aroma] No need to buy an extra aroma diffuser now! Simply adding 2-6 drops of essential oil to the built-in pad, the fragrance will slowly fill the room with your favorite scent, making it a wonderland for yoga, mindfulness, and meditation.

The Ultimate Buying Guide: Choosing the Right Humidifier for Your Large Space

A big room needs the right amount of moisture to feel comfortable. A good humidifier adds water vapor to the air. This helps dry skin, scratchy throats, and static electricity. Buying one for a large area is different than buying one for a small bedroom. Follow this guide to find the best fit for your big space.

Key Features to Look For

When shopping for a humidifier for a big room, certain features make a huge difference in performance and ease of use.

Coverage Area and Capacity
  • Room Size Rating: Always check the product label. It should clearly state the square footage it can handle. Look for models rated for at least the size of your room, or slightly larger.
  • Tank Size: Bigger rooms need more output. A larger water tank means you refill it less often. Aim for tanks that hold at least 1.5 gallons or more for very large areas.
Mist Type and Control
  • Cool Mist vs. Warm Mist: Cool mist humidifiers are safer around kids and pets because they don’t use heat. Warm mist units boil water, killing most germs, but they use more energy. For large open spaces, cool mist is often preferred for safety and efficiency.
  • Adjustable Settings: You need control. Make sure the unit has multiple speed settings or a variable output control. This lets you fine-tune the humidity level.
Convenience Features
  • Humidistat: This is essential. A built-in humidistat measures the current humidity level. It automatically turns the unit on or off to maintain your desired level (like 45% humidity). This prevents over-humidifying the room.
  • Timer and Auto Shut-Off: Timers let you schedule operation. Auto shut-off is a safety feature; it turns the machine off when the water runs out.

Important Materials and Build Quality

The materials used affect how long the humidifier lasts and how clean the mist stays.

Plastic Quality

Most humidifiers use plastic tanks and bases. Look for durable, BPA-free plastic. Cheap plastic can sometimes crack or leach odors over time. Feel the unit if possible; sturdy construction usually signals better quality.

Filter Type (If Applicable)

Some humidifiers use wicks or filters to trap minerals from the water. If your unit has a filter, check how often it needs replacing. Filters add to the long-term cost.

Factors That Improve or Reduce Quality

Good humidifiers offer quiet operation and easy cleaning. Poor design choices lead to frustration.

Noise Level

For large living rooms or open offices, noise matters a lot. Ultrasonic models are usually the quietest. Check reviews specifically for noise complaints, especially on the highest setting.

Ease of Cleaning

Mineral buildup (white dust) and mold are common problems. Units with wide openings at the top are much easier to clean than those with small, narrow tanks. If cleaning feels difficult, many people stop doing it, which reduces the machine’s quality and safety.

Water Type Consideration

If you use hard tap water, you might see a white dust coating on furniture. This is mineral dust. Using distilled water reduces this issue, but it means you buy more water or use a demineralization cartridge, which affects your running costs.

User Experience and Use Cases

Think about where and how you will use the humidifier.

Whole House vs. Single Room

For truly massive areas (like open-plan kitchens and living rooms combined), you might need a high-output unit designed for large spaces, or perhaps two medium-sized units placed strategically. Do not try to run a small bedroom unit in a huge space; it will not keep up.

Maintenance Routine

Be honest about how often you will clean it. If you travel often or forget easily, choose a unit that requires minimal daily attention, perhaps one with a large tank that lasts 24 hours or more on a single fill.


10 Frequently Asked Questions (FAQ) About Big Room Humidifiers

Q: How much humidity is too much for a big room?

A: Experts suggest keeping indoor humidity between 30% and 50%. Anything over 60% can encourage mold and mildew growth, even in large rooms.

Q: Do I need a special type of water?

A: Not necessarily, but distilled or demineralized water works best. It stops white mineral dust from settling on furniture, which often happens with hard tap water in powerful units.

Q: Which type is best for a very large open-plan area?

A: Large-capacity ultrasonic humidifiers are often recommended. They disperse cool mist quietly over a wide area and are energy efficient.

Q: How often should I clean a large-capacity humidifier?

A: You should clean the base and tank at least once a week. Daily rinsing and refilling are also good habits to prevent bacteria growth.

Q: Can one big humidifier cover two connected rooms?

A: Yes, if the rooms are on the same floor and the doorways are open. Ensure the combined square footage does not exceed the humidifier’s maximum rating.

Q: What does a humidistat do?

A: A humidistat measures the air moisture. It acts like a thermostat for humidity, automatically turning the machine off when the desired level is reached, saving energy and preventing dampness.

Q: Are warm mist humidifiers safe for large rooms?

A: They are effective, but they heat the water first. This uses more electricity, and the steam can be hot. Cool mist is generally the safer choice for high-traffic large areas.

Q: What is “white dust,” and how do I stop it?

A: White dust is minerals from tap water that the unit sprays into the air. Using distilled water or a demineralization cartridge in the machine helps prevent this buildup.

Q: How do I know if my unit is powerful enough?

A: Check the CFM (Cubic Feet per Minute) rating, though most manufacturers list square footage coverage. If the air still feels dry after running the unit for several hours on high, the coverage rating was too small for your room.

Q: Does having a ceiling fan affect humidifier performance?

A: Yes. Running ceiling fans on a low setting helps circulate the moist air evenly throughout the large room, making the humidifier work more effectively.