The 8 Best Essential Oil Diffusers For Large Rooms

— Also available at Walmart, $69.00

With its 1,000-milliliter tank and a convenient remote control so you can adjust the settings without having to get up, this ultrasonic essential oil diffuser is perfect for large rooms. It features three timer settings (3, 6, or 9 hours) and lights up in seven different LED colors. In fact, the nightlight function can be used independently from the diffuser. As even more of a bonus, it also functions as a humidifier: Put it on low-mist mode, and it can run for up to 15 to 20 hours (while the high-mist mode runs up to 10 to 15 hours). Last but not least, it has an auto shut-off function for added safety, so it'll turn off by itself once the tank is empty.

What fans are saying: "Love this diffuser! Excellent value. Simple and efficient design makes it very easy to clean and to fill. This is important when switching between different types of essential oils. I would even buy this over a regular mister/humidifier any day. It pumps out enough mist to serve even a large room. The light show is an added bonus.”

— Also available at Walmart, $61.00

For a heavy-duty dose of aromatherapy, consider this ultrasonic humidifier and diffuser duo, which was specifically created for large rooms. It is designed to humidify the air in rooms up to 325 square feet and provides aromatherapy scent coverage up to 450 square feet. With a large capacity 1,500-milliliter tank and a knob with 270-degree rotation to control the humidity level, you can let this gadget run, hassle-free, for up to 20 hours. Plus, since it doesn’t use heat to disperse the aromas of essential oils, it will better retain their "integrity and holistic properties". Other highlights include its whisper-quiet function and seven different LED light options, ranging from bright to dim.

What fans are saying: "Excellent large diffuser. I turn it on in the morning, turn it off at night, runs around 10-12 hrs a day, it never really runs dry. I fill it with about 3 cups of water in the am, there's around a cup left at night. Approx but you get the idea. Love the different led colors, and there's a little light near the dial that turns on when it's running low on water. I have a reminder in my phone set to remember to turn it off, however I'm considering plugging it into a timer to turn off on its own. I run it all day long, and it seems to work as a decent humidifier, as well. I really love it!”

Since this nebulizing diffuser doesn’t use heat or require water, essential oils will retain more of their natural benefits, which means faster and more potent relief. It can cover up to a whopping 700 square feet of space with an ultra-sleek and modern-looking design, making it perfect for open concept homes or lofts. The portable, USB-rechargeable diffuser works for up to 8 hours on one charge, and it features a timer and multiple mist settings. Color options include black and white.

What fans are saying: “Great quality product and fits every essential oil bottle I have. It is very quiet on any power setting which I am surprised by. Pleasant scent in a large radius. I would definitely recommend this to a friend who is into aromatherapy. Also, the design is a great choice as it is portable and efficient; does not burn too much oil. Another great feature is that it is battery powered and is almost never required to be plugged in to use.”

This ultrasonic diffuser and humidifier duo does it all: In addition to dispersing your favorite aromas, it also works as a speaker (it's Bluetooth-enabled) and night light (it lights up in seven different colors). Its 550-milliliter capacity is good for spacious rooms, and the diffuser offers two mist settings, timers for 1, 2, and 3 hours, and auto-shutoff when the tank is empty. Plus, the diffuser is easy to control with the included remote.

What fans are saying: “It has worked well so far. Quiet and good-looking. The water can last a whole night, which is very good for sleeping. I set up two diffusers in my bedroom, one with my bed and the other one with my desk and laptop. I like the quiet and cozy feelings they created.”

This budget-friendly diffuser is another wonderful option that offers multiple functions, albeit at a cheaper price tag. Not only does it effectively disperse essential oils into the air, but it also acts as a nightlight and humidifier. It offers seven LED light options that can be turned off, set to cycle gradually, or fixed to the color of your choosing. With ultrasonic technology that ensures the quietest of functions, this beautiful little diffuser packs a powerful punch: While its 500-milliliter tank might not diffuse an entire house floor, it'll certainly do the job in spacious bedrooms or living rooms.

What fans are saying: " I love this one! The water bubbles, so there's some noise (not much IMO) from that and I like the sound! I use either Thieves or On Guard oil at the moment. What I like better about this one, than the one I used to have, is the size and ease of use. The output is fierce (almost as much as my humidifier, which they say kills viruses) and it makes my large living room smell good.”

This ultrasonic diffuser with gold and marble accents will blend in perfectly with modern decor, and its 500-milliliter tank provides coverage up to 480 square feet. The diffuser boasts quiet operation and three timer settings for 1, 3, and 6 hours. You’ll get up to 20 hours of aromatherapy at a time, and the diffuser shuts off automatically when the water tank is empty. Plus, there are seven LED light options in soothing shades.

What fans are saying: “Perfect room diffuser. You can smell it over the whole house. I used the Laguna moon line for essential oils and they are not extremely concentrated but subtle and strong enough to make the house smell great!”

Featuring nine soothing sounds — including rain, piano music, and white noise — this ultrasonic diffuser with a built-in sound machine will make your next aromatherapy session super relaxing. The 500-milliliter water tank can diffuse scent and humidify rooms for up to 13 hours with two mist settings. You can have the diffuser run continuously until the water runs out, release mist every 10 seconds, or turn off after 2 or 4 hours. There’s also a warm light with dim and bright settings.

What fans are saying: “[...] As a diffuser, it works remarkably well. My living room is large and with about 7-10 drops (with a full reservoir of water), the mist diffuses essential oils throughout the whole room. I was impressed [...].”

— Also available at Walmart, $50.00

This 2-in-1 ultrasonic diffuser releases fragrance and has a built-in chamber for Himalayan salt crystals, which may help purify the air in your room. The diffuser has a 400-milliliter water tank and automatically turns off when the tank is empty, but it does not have adjustable mist settings. However, it does come with 10 essential oils (including lavender, eucalyptus, and tea tree) and 2 pounds of Himalayan salt crystals. There’s also an optional color-changing ambient light.

What fans are saying: “Easy to use and love that the salt rocks are lit. Great amount of mist and holds a larger amount of water than some others I have so will require less refilling. My new favorite diffuser.”