5 Best Oil Diffusers for Large Rooms & Spaces: Buyers Guide + Reviews

Diffusing essential oils is a fantastic way to enjoy their benefits and aromas. No longer do you need to rely on artificial air fresheners and sprays to scent a room. Diffusers can do the job better, longer and with health benefits too.

For regular rooms most diffusers can do an adequate job. But, if you’ve ever tried a ‘regular’ diffuser in a large room or space, you may have found it came up short. In fact, if you aren’t in close vicinity of the diffuser, it is likely you don’t get the waft of essential oils at all.

Most small diffusers won’t emit enough mist to fill the space. In contrast, a large aromatherapy diffuser will provide more mist, for a longer time. These are definitely the pick for large rooms and areas.

There are certain things to look for when choosing an essential oil diffuser for large rooms. These criteria are covered below, along with our top picks for this situation.

Please note, there are new large room diffuser products appearing on the market all the time. But, at the time of writing, these are the top large diffusers.

Table of Contents

The Criteria We Used

Tank Size

The bigger the tank, the more water you need and the longer the diffuser can run without refilling. This doesn’t always mean it gives better coverage but a bigger tank means better capacity.

Mist Power

If the mist isn’t powerful, it doesn’t matter how big your diffuser is. A strong mist is important to ensure the oils disperse far enough to reach the far corners of your room.

Good Looks

You want to be able to show off your diffuser as a part of the decor. A good looking diffuser adds to room ambience and if it’s ugly, you won’t want to use it.

Extra Features

Diffusers can come with all sorts of extra features. These include lights, remote control, interval misting and timers. Most are not important for the basic function of the machine, but can make it more practical and easy to use.

The 5 Best Essential Oil Diffusers for a Large Room

#1 URPOWER 1000ml Essential Oil Diffuser: Best Overall

Big, powerful, flexible and very affordable.  That’s why this diffuser is our pick for large areas.  While not the biggest diffuser on our list, it is the most powerful and quickly fills a large room with beautiful aromas.

Able to last up to 20 hours on the lowest mist setting it offers 3 timer settings.  You will never have to worry about it running out while you sleep!

The unique remote control means you can take charge of the diffuser within 5 meters – no need to get up off the sofa.  Adjust the mist level or lighting as needed to create the perfect output.

This large essential oil diffuser is designed to humidify a big area quickly and efficiently.  It can also be used as a stand alone humidifier without essential oils (but that isn’t much fun) or a night light.  The choice is yours.

The Good

  • Offers the strongest mist that fills up to 430 sq ft
  • The only large diffuser with a remote control for timer and mist levels
  • Functions as a stand alone humidifier and night light if needed

The Not So Good

  • Lights can’t be dimmed

Bottom Line: If you are after a big, whisper quiet diffuser that delivers strong mist for big spaces, then this is perfect.

#2 Exqline 1500ml Essential Oil Diffuser: Best Mist Control

At a massive 1.5 liters, this large oil diffuser is perfect for the office or home where you want to set and forget for the day (or night). With such a large capacity, it can run continuously for up to 20 hours in low mist mode.

The ability to provide aromatherapy coverage up to 450 sq ft makes this the perfect large room diffuser.  Coverage is helped by the unique 360 degree mist nozzle that rotates to ensure even distribution of mist.

Another great feature is the ability to control the mist output level.  The higher mist level is great for humidifying and the diffuser still runs up to 10 hours. When the water runs out, the unit automatically shuts off.

You can choose from 7 color changing lights at either a bright or dim level to create a cozy ambience.

The Good

  • The biggest tank
  • Unique mist level dial for the most options
  • The only diffuser with a 360 degree mist nozzle for even distribution
  • Takes up the smallest bench space of all the diffusers

The Not So Good

  • No timer feature so must be manually shut off or wait for auto shut off when water runs out

Bottom Line: When controlling mist output and direction is important, this diffuser is the best option.

#3 ASAKUKI 700ml Essential Oil Diffuser: Square Design

Sturdy, square design is what many people prefer.  And that is what this very capable diffuser offers.  Designed to deliver a thicker and better mist, it will cleanse the air and invigorate the senses for up to 20 hours.

Choose one of seven colors to suit your mood or décor, or simply let it roll seamlessly through the rainbow as you drift off to sleep. You can also turn the light or mist off completely if preferred.

Emitting a huge amount of mist, the ASAKUKI is easy to refill and clean and its design makes it a great addition to any decor.

The Good

  • Unique square design
  • Strong mist output
  • 3 timer modes, 7 light colors
  • Can be used as humidifier or night light alone

The Not So Good

  • No remote

Bottom Line: If a sturdy, square design is your preference, this is the ideal essential oil diffuser for large room areas.

>> Click to see the ASAKUKI 700ml Diffuser on Amazon <<

#4 Aromacare 600ml Large Essential Oil Diffuser: Most Stylish

Aromacare 600ml Essential Oil Diffuser for Large Room, Aroma Diffuser for Essential Oils/Cool Mist Humidifier for Aromatherapy, Defuser for Large Room,Dark Wood Grain,Last 12 Hours

The Aromacare diffuser boasts an impressive water capacity and the ability to purify the air for up to 20 hours.  But what we love is its shape and wood-grain look.  It is the most stylish of the large room essential oil diffuser products on the market.

Bringing a subtle ambiance with its built-in, warm glow light and wood-grain exterior. It’s also one of the quietest diffusers which makes it the perfect ‘seen but not heard’ addition to the home.

Its stylishness shouldn’t be mistaken for a lack of substance—the Aromacare emits an impressive amount of mist, sure to put at ease any lingering coughs, allergies or tension.

The Good

  • Stylish shape and wood-grain look
  • 2 mist modes – can run 12-20 hours

The Not So Good

  • Not great as a night light
  • No timer

Bottom Line: Ideal for anyone who wants a warm, stylish looking diffuser and doesn’t need a light feature.

>> Click to see the Vida 600 ml Diffuser on Amazon <<

#5 URPOWER 500ml Essential Oil Diffuser: Best on a Budget

This is a smaller size of our number one pick.  It offers a lot of similar functionality but doesn’t have remote.  Works as both a large room essential oil diffuser and a humidifier with the added benefit of an alternating colour night light.

While not as big as the others, the water capacity of 500ml allows it to run up to 10 hours continuous use.  The mist is strong, it just won’t last as long.

It automatically turns off after choosing from the three time period options, or once the water has run out.  Like its big sister, it is amazingly quiet and still a great essential oil diffuser for a large room.

The Good

  • Strong mist output
  • Works as humidifier as well
  • Two mist levels
  • Can control the look with light options

The Not So Good

  • Smallest tank of all the products reviewed so won’t last as long
  • No remote

Bottom Line: For budget buyers who want a large room diffuser at an affordable price.

>> Click to see the URPOWER 500ml Diffuser on Amazon <<

The Verdict: What Is YOUR Best Choice

The best essential oil diffuser for a large room is one that has a large capacity, strong mist and practical features.   Ideally it also looks like it’s part of your decor and has sufficient light and time settings to suit your needs.

For those reasons, the best essential oil diffuser for large rooms is the URPOWER 1000ml diffuser.  The only one with a remote control, it ticks all the boxes and is an affordable choice.

If you want supreme mist control then the Exqline 1500ml diffuser is the best choice with 360 degree mist output and the ability to vary mist levels.

Square and sturdy is often a design preference, and for that the ASAKUKI 700ml essential oil diffuser is ideal.

In contrast, the wood look of the Aromacare 600ml oil diffuser is the most stylish of all our large room diffusers.  Good looking and still very capable.

And if you want a big diffuser, but are on a budget, choose the URPOWER 500ml diffuser.  Low on price, but still plenty of features it is a popular choice.


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2 thoughts on “5 Best Oil Diffusers for Large Rooms & Spaces: Buyers Guide + Reviews”

    • Hi Michelle, 10-15 drops is a good starting point for big diffusers. Start with this and if you feel it needs a bit more, it’s easy to add a few drops. Kristy


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