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This list of best essential oil diffusers for large rooms includes a carefully curated mix of ultrasonic and nebulizing diffusers from premium essential oil brands.
When diffusing oils in spacious rooms, you must use essential oil diffusers for large spaces so you can enjoy the aroma in every corner of the room.
Using a small diffuser in a large room will not give you the effects of the oil you are diffusing. That’s because smaller units do not have the output necessary to disburse the scent throughout the large area. You may get the scent of the oil while standing close to the device, but that scent will get fainter and ultimately disappear as you move further away from the device.
When we talk about essential oil diffusers for large rooms, it’s not necessarily the capacity of the unit that matters. A unit with a larger water capacity may not always be the best diffuser to use in a large room. What’s more important is the output of the device.
Essential oil diffusers for large rooms have larger coverage areas. They are able to ‘throw’ the scent of the oil over a greater distance. Check the coverage area of each of the large-space diffusers listed below and choose one that’s best suited for the size of your room.
1. Plant Therapy TerraFuse™ Deluxe Diffuser
Modern, stylish, and powerful, Plant Therapy’s TerraFuse Deluxe Diffuser is my number-one pick of essential oil diffusers for large rooms.
The TerraFuse Deluxe Diffuser features a large water reservoir with a 210ml water capacity, which easily covers an approximate area of 430 square feet. It operates using ultrasound technology, which requires no heat or chemicals allowing the essential oils to retain their chemical profile so you get the full therapeutic benefits.
It has 5 timer settings with continuous and intermittent options, which give you complete control over the amount of mist diffused into the air and the run time of the diffuser. When used in continuous mode, the diffuser will give you up to 8 hours of diffusion
The device will shut off automatically when the timer is complete or the water has run out. That’s another huge plus point as it means you don’t have to worry about keeping track. Just switch it on and do your thing while the device runs in the background.
Made of polypropylene and measuring 5.25” in height x 6” in width, the Terrafuse Deluxe Diffuser comes in two earthy colors – brown and cream – that add a natural touch to any room. The buttons and power cord are located discreetly at the back of the diffuser, allowing you to showcase the smooth, natural stone appearance that is sure to complement any decor.
Get detailed instructions for operating and cleaning the Terrafuse Deluxe Diffuser.
2. Vitruvi Stone, Ceramic Ultrasonic Essential Oil Diffuser
This beautifully crafted ultrasonic diffuser from Vitruvi is made from the highest quality ceramic. Every feature has been considered in minute detail, from its sophisticated modern design to the placement of buttons on the unit.
The Vitruvi Stone Diffuser diffuses aromas evenly up to 540 square feet, which makes it great for use in a larger room. The unit uses ultrasonic vibrations without heat, which helps to retain the integrity of the oils.
With this Ceramic Ultrasound Diffuser, you can diffuse oils for 3 hours on a continuous setting and 7 hours on interval settings. The misting output is 1 oz/hour on the consistent setting and 0.40 oz/hour on the intermittent setting.
It operates quietly with a soft, gurgling sound that’s immensely soothing.
The Vitruvi Ceramic Essential Oil Diffuser is a fantastic choice if you want an elegant and quiet diffuser that also doubles as a decorative item. It is available in 4 stunningly beautiful colors – Charcoal Grey, Jet Black, Terracotta, and White.
3. Rocky Mountain Oils Droplet Diffuser
With its sleek, compact design, this Droplet Diffuser from Rocky Mountain Oils looks deceptively small. Don’t let its size fool you though. This small package packs a mighty big punch with a 150 ml capacity and a 400 square foot coverage
The Droplet Diffuser measures 4” x 4” x 3.75” and offers a run time of up to 6 hours on continuous mode. You can choose from three light modes – rotating, fixed, and off. Turning the color rotation on will inject a fun atmosphere in your space as the colors rotate between blue, green, purple, and red as you diffuse your favorite oil or blend.
The minimalistic design of the Droplet Diffuser helps it blend easily in any setting, making it ideal for placing at your work desk. It is powered by USB, which further adds to its minimalistic design as there are no wires trailing around.
4. Exquisite – Nebulizing Diffuser by Organic Aromas
The Exquisite Nebulizing Essential Oil Diffuser has a unique contemporary design. The refined hand-made wood base and the custom-blown glass diffuser complement each other beautifully giving the device a sleek, sophisticated look.
The unit is approximately 4” wide x 9’ tall and offers an impressive 800 sq. feet coverage, making it the best essential oil diffuser for open concept homes, large lofts, office spaces, and conference rooms.
Exquisite by Organic Aromas is a nebulizing diffuser. It works by using airflow to blow the essential oil directly into the air in the form of tiny droplets.
The unit uses no water or heat so there is no loss of therapeutic properties during diffusion. It has adjustable mist levels and functions on an alternating cycle of 2 minutes on and 1 minute off. The device operates silently and uses very little energy. A ‘touch sensor’ light allows you to turn the LED light on or off any time with a swipe of a finger.
The Exquisite Diffuser is available in a wide range of colors and styles.
Scroll down below the product video to preview the detailed instruction manual of Organic Aromas’ Exquisite Nebulizing Essential Oil Diffuser. 
5. Raindrop Nebulizing Diffuser
The Raindrop Nebulizing Essential Oil Diffuser by Organic Aromas has the same features and functions as the Exquisite line. The only difference is its physical appearance.
The diffusers in the Raindrop line are raindrop-shaped, with a large rounded base that tapers towards the top. The base is made from plantation hardwood and the top is made from custom-blown glass. It measures approximately 4” at the base and is 9” tall and offers coverage of 800 square feet.
Raindrop is a nebulizing diffuser. It works without water and no heat is generated, so you can get the full therapeutic benefits of the oil used. A volume switch lets you control the precise amount of oil you wish to diffuse. The unit alternates between 2-minute on and 1-minute off cycles and shuts off automatically after 120 minutes.
With its generous space coverage, quiet operation, and energy efficiency, this is an excellent large space diffuser to use in the bath, spa, or beauty parlor.
If you’ve never used a nebulizing diffuser before, if you scroll down the page, you can see a short video on how to use the Raindrop Nebulizing Diffuser. Also included is a link to preview the instruction manual.
6. Young Living Dewdrop Essential Oil Diffuser
The Dewdrop Diffuser uses ultrasonic technology, which breaks essential oil and water into millions of microparticles that are dispersed into the atmosphere as a gentle, aromatic mist. The unit features an unprecedented 11 LED light settings including rainbow, flicker, and flame.
Designed to be multi-functional, the Young Living Dewdrop Essential Oil Diffuser can be used as an aroma diffuser as well as a humidifier and atomizer for medium to large rooms. It has multiple settings that allow the aroma to permeate the space for up to 10 hours of blissful aromatherapy.
This unit comes with one 5ml bottle each of Peppermint and Tangerine essential oils.
7. The Halo XL Humidifier-Diffuser
The Halo XL humidifier-diffuser from GuruNanda has a sleek, minimalistic look that will transform your home into a wellness oasis.
This large-space diffuser uses state-of-the-art ultrasonic wave technology to generate and circulate moisturized air for up to 22 hours at a time. This makes it especially useful for adding much-needed humidity into the air during the dry winter months. You just switch it on and it will run quietly in the background for 22 hours of uninterrupted use.
The unit has multiple settings so you can customize the diffusion and misting to your preference.
I love that Gurunanda has a Quick Start Guide video of The Halo that shows you how to use and customize the diffuser. This is particularly useful if this is your first time using an essential oil diffuser.
8. BlueHills Premium 2000 ML XL Large Essential Oil Diffuser Humidifier for Large Room
It comes packed with several useful features starting with an extra-large capacity of 2 liters, which offers up to 40 hours run time and a generous coverage area.
The automatic shut-off kicks in when the water is below the marked level so you can simply put it on and forget about it as you go about your day and onto the next day. No worrying about the unit getting damaged because the water has evaporated.
There are multiple mist output settings so you can infuse as much or as little humidity into the room, depending on your preference. The exact run time will depend on the mist setting. 7 LED lights add mood lighting to create a calm, relaxing ambiance.
This particular model, the BlueHills 2500 ML XL Essential Oil Diffuser for Large Room has a 2,500 ml water tank and is made of wood and metal.
All other features are similar to the previous model but the larger water tank capacity means it has a longer run time.
9. Marble Zen Diffuser
If you’re looking for a diffuser with clean, straight lines that complements the rest of your minimalistic décor, you’ll love the Marble Zen Diffuser from Rocky Mountain Oils. Of course, there’s more to it than just its good looks.
This diffuser for large rooms has a compact cube shape with a white marble-patterned exterior and 200 ml water capacity. There are two mist modes – continuous and intermittent with 30S on and 30S off. It offers up to 6 hours of run time, depending on whether you use it on continuous or intermittent mist mode.
The Marble Zen Diffuser has a coverage area of approximately 500 sq. ft. It uses high-frequency heat-free ultrasonic technology that vibrates the water and essential oil in the tank and turns it into an ultra-fine aromatic mist. This is dispersed into the air, adding humidity to the atmosphere while also providing instant health and wellness benefits.
Scroll a little down on the page to read the detailed instructions for how to use and maintain the Marble Zen Diffuser.
10. ASAKUKI Smart WiFi Essential Oil Diffuser – Easy Connect with Alexa and Google Home Phone App Voice Control
This intelligent WIFI diffuser is compatible with Alexa and Google Home so you can control the device with your voice. All you need to do to enjoy its full functionality is download the companion app after buying the diffuser. You can then change the light color, schedule the misting and control the spray from wherever you are. You don’t need to get off the sofa or bed.
In fact, you don’t even need to be home to start diffusing. You can add your favorite relaxing essential oil and water to the water tank before leaving home for work. Before heading home at the end of the day, activate the ASAKUKI Smart WIFI diffuser using your phone and step straight into a relaxing atmosphere when you get home.
The water tank has a capacity of 700 ml, which is sufficient for misting and diffusing through the night. The unit rotates through 7 different colors, creating a nice lighting effect.
11. URPOWER 1000ml 5-in-1 Ultrasonic Diffuser & Cool Mist Humidifier Remote Control
This URPOWER 1000 ml essential oil diffuser is packed with useful features for a surprisingly low price of less than $40. And it’s got over 8,000 reviews on Amazon, which speaks volumes about its popularity.
With its large water capacity and two mist modes, this large space diffuser doubles up as an effective humidifier. You can use it with or without essential oils to gently increase the moisture in your room during the dry winters or when you have the air conditioner running for extended periods. You can choose from 3, 6, and 9 hours of misting. The auto shut-off kicks in when the time is up or when the water in the tank is over so you don’t have to worry about it overheating. Without the mist mode, the diffuser will run for 20 hours.
The quiet operation, long run time, and humidifying action make the URPOWER 1000 ml essential oil diffuser perfect for use at night. The remote control adds to the convenience of this neat-looking diffuser.
12. Ellia, Gather Ultrasonic Aroma Diffuser
The 200ml reservoir provides a light pleasant aroma while gently humidifying your space for 10 hours on continuous mode and up to 20 hours on intermittent mode. This is great if you are looking for a diffuser that you can set and forget without having to remember to refill every couple of hours.
A beautiful color-changing mood light and a library of relaxing and uplifting sounds make the Ellia Gather the best large space diffuser for meditation.
A remote control allows you to adjust the settings from a distance, which can be really convenient when you’re using it in a large room.
As an added bonus you get 2ml bottles of Ellia Essential Oils with the diffuser – Orange, Fight It, and Pay Attention. Read the detailed description and how to use the Ellia Gather Ultrasonic Aroma Diffuser.
13. doTerra Petal Diffuser
doTerra’s Petal Diffuser for essential oils is a compact, convenient, 3-piece diffuser measuring 5.4 x 5.9 x 5.9 inches. With its minimalist, sleek construction and light purple and white color, it induces a sense of peace, calm, and relaxation.
The Petal Diffuser emits an ultra-fine mist that reaches an area of up to 330 square feet. The reach is slightly smaller than the other large-space diffusers mentioned but the substantial mist output more than makes up for it. The ultra-fine mist diffuses the aromatic and therapeutic benefits of the essential oils into the environment, purifying and humidifying the air around you.
Three timer settings of 1, 2, and 4 hours allow you to customize the release of essential oils in the atmosphere. It has an optional LED light setting – night light or night-free.
The unit has a stable base so you need never worry about it toppling over. It is light, easy to use, and easy to clean with plain soap and water.
The Petal Essential Oil Diffuser from doTerra has received over 1,100 reviews on Amazon itself. Most users are very happy with their purchase. Much-loved features include the water capacity, ease of use, and mist-aroma output.
doTerra has introduced a new Petal Diffuser model – Petal Diffuser 2.0. The 2.0 model has the same features as the original but with a slightly larger capacity and diffuser time. The Petal Diffuser 2.0 measures 5.75 x 5.63 x 5.39 inches and offers 2 and 6 hours on continuous diffuser setting and 12 hours intermittent (5 min. on, 5 min. off) diffuser settings.
14. ArOmis Solum Lux Vitis Wood and Glass Essential Oil Diffuser
The ArOmis Wood and Glass Nebulizing Diffusers use air and vibration to diffuse oil into the air so you get the purest and most concentrated aroma over a large area. These are a great choice if you are looking for a unit that will fill your 30’ x 30’ space with wonderful relaxing aromas.
Read my detailed ArOmis Wood and Glass Nebulizer Review.
15. Rocky Mountains Oil Meadow Ceramic Ultrasound Diffuser
The Meadow Diffuser is the latest ultrasonic essential oil diffuser from Rocky Mountain Oils. This is a brand that’s known for putting great care and thought into the design and functioning of each and every diffuser.
Made with white ceramic and featuring floral cutouts, the Meadow Diffuser has a sleek, stylish look that will add elegant charm to your living space.
This large-space ultrasonic diffuser measures 5”x6” and has a water capacity of 60ml. Its run time is up to 6 hours and it covers up to 450 sq. ft.
You have a choice of 3 misting modes – continuous, intermittent, and off. This is great as you can adjust the misting to the season and to your needs.
Another beautiful feature of the Meadow Diffuser is the lighting options. You can choose from warm white, color rotating, fixed, and off. I absolutely love this! White is perfect for imbuing the space with a hygge ambiance while the rotating color infuses the room with a dollop of energy. The light can be switched off when diffusing essential oils for sleep.
The Meadow Diffuser uses high-frequency ultrasonic technology that vibrates the water and turns into an ultra-fine mist. When essential oils are added, they are immediately dispersed into the air, filling the space with the aroma of the oil, and providing immediate health benefits while ionizing the air.
Place in your bedroom, living room, office, or anywhere you want to create a healthful or relaxing environment.
Some large room diffusers that were listed here before have since been discontinued.
Related Reads:
Types of Diffusers For Essential Oils
Ultimate Guide To Buying A Diffuser For Essential Oils
How To Use An Essential Oil Diffuser The Right Way
Assorted Diffuser Blend Recipes To Use In Your Large Space Diffusers
Cute, Colorful, Kid-Friendly Essential Oil Diffusers for Kids
Budget-Friendly Essential Oil Diffusers Under $25
Disclaimer: This information is not intended to serve as medical advice. Please consult your doctor before using any natural medication or if you experience any unusual symptoms. See Full Disclaimer here.
