The Best Diffuser for Large Rooms: Top 7 Picks

The benefits of aromatherapy can be felt throughout your home or office when you use a diffuser. Smaller models can be difficult to spread around a room and you might not feel the full effects.

The best diffusers for large rooms have been reviewed and rated, and I have compiled a “best of” list to help you pick the right model for your home. To help online shoppers navigate better products, I independently research, test, and recommend the best brands.

I hope you find something suitable among the ideas I’m offering.


Essential oils are often difficult to diffuse in large rooms. If you have an open concept living room or main floor, it can be frustrating when your diffuser doesn’t spread the smell evenly. In the end, aromatherapy benefits should be enjoyed wherever you sit in your room.

You can use it to diffuse essential oils in your home and create a cozy atmosphere.

When choosing an oil diffuser, you need to consider its runtime as well. If the diffuser doesn’t last long, you’ll have to refill it frequently. Think about running a spa or yoga retreat. You don’t want to have to refill it every 2-3 hours. You need a diffuser that runs for at least six to ten hours.

All of the essential oil diffusers I discuss here have been specifically designed for use in large rooms, so you can avoid some of these problems.

Each of these units has a water tank that is over 300 mL, and they run for around 8-10 hours on average.

Let’s dig into the list!

The Best Diffusers for Large Rooms

1. Jack & Rose Store Diffusers for Essential Oils Large Room

Jack & Rose Store Diffusers for Essential Oils Large Room

We tested this ultrasonic essential oil diffuser on a number of levels: design/style, functionality/features, and overall efficiency/run time.

The 500 mL water tank is ideal for large rooms and large spaces, such as yoga studios or open-concept main floors. 480 square feet of coverage can be covered, and it can run up to 20 hours at a time. With a timer setting, you can set the diffuser to operate for 1 hour, 3 hours, or 6 hours at a time.

With a decibel rating of 25, this diffuser provides a soothing and restful environment for relaxation, learning, working, or sleeping. It uses noise reduction technology to ensure low noise.

With its independent mist and color buttons, this ultrasonic diffuser is one of the best features available. Press each button separately to get the desired function. With that, you can run it only as a night light, or just as a cool mist humidifier. In addition to that, you can run the light and mist functions at the same time. Light cycle through 7 colors, or you can pause/set the cycle to stay on one specific color only by pressing the light button during its cycle.

If you are looking for oil diffusers for large rooms, this is the one for you! With its modern design and sleek look, this ultrasonic aromatherapy diffuser makes a great and valuable gift for your friends and family. It is available in four distinct colors: green, blue, indigo, and pink.

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2. BZseed Aromatherapy Essential Oil Diffuser Humidifier

BZseed Aromatherapy Essential Oil Diffuser Humidifier

It is listed as Amazon’s Choice for a reason. This diffuser from BZseed is a great option when shopping for diffusers for large rooms.

It comes in four distinct colors, allowing you to match your home’s decor: black, white, dark wood, and light wood. The materials are plastic, with a faux wood finish.

There are two modes: high mist and low mist. The high mist mode will run for 9-10 hours, while the low mist mode will run for 10-12 hours.

Also, you can choose between bright and dim light modes, constant color or rotation of 7 colors. Change the lights according to your mood!

With a timer setting of 1H / 3H / 6H or continuous ON, this cool mist humidifier will automatically shut off when the time is up or no water is available.

You almost don’t notice the white noise produced by ultrasonic diffusers, especially if you sit farther away from them in your room. These types of diffusers produce vapor without generating heat, which best preserves the essential oil.

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3. TENSWALLXCXP Essential Oil Diffuser Aromatherapy Vaporizer Time

TENSWALLXCXP Essential Oil Diffuser Aromatherapy Vaporizer Time

It comes in three colors: black, white, and beech wood brown (yellow). It is made of BPA-free plastic.

This ultrasonic diffuser has a 400 ml water reservoir, allowing it to run for 8-10 hours. It has a timer setting of 1 hour / 3 hours / 6 hours and a continuous ON setting.

The 7 colored light mode creates a smooth ambiance in your home. The soft mood lighting is perfect for relaxing or sleeping.

I like that even though it’s a budget option, it doesn’t make a lot of noise. Its noise levels are rated at 35 dB, which is lower than the average level in a public library.

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4. URPOWER 1000ml Essential Oil Diffuser

URPOWER 1000ml Essential Oil Diffuser

A remote control comes in handy when your aromatherapy diffuser is in the opposite corner of your living room.

There is no better option for a large essential oil diffuser than this 5-in-1, 1000 ml ultrasonic diffuser in stylish white, black or natural brown. It is easy to operate and has been rated for large spaces.

This diffuser features 4 timer modes (ON / 3H / 6H / 9H), 2 mist modes, 7 soft light options, and a safe automatic shut-off feature.

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5. Sierra Modern Home Smart WiFi Wireless Essential Oil

Sierra Modern Home Smart WiFi Wireless Essential Oil

The Sierra Smart Diffuser adds control features that work directly with an app on your smartphone and is also compatible with Alexa and Google Home.

This essential oil diffuser also features a strong or weak mist setting, which allows you to adjust the intensity of scent you wish to disperse throughout your home.

The 400ml water tank lasts up to 12 hours. The diffuser shuts off automatically when the water runs out.

Although I appreciate the smart capabilities of this diffuser, it lacks a timer. This means you have to turn it off manually, schedule it to turn off via the smart app, or let it run out of water before turning it off.

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6. Minidiva Professional Grade Diffusers for Essential Oils

Minidiva Professional Grade Diffusers for Essential Oils

There is no water added to nebulizing diffusers, so they are much more concentrated than ultrasonic diffusers. You can use only pure essential oils in a nebulizing diffuser. As a result, a diffuser should be able to disperse the scent across all corners of a larger space.

The LOXIM MiniDiva nebulizing aromatherapy diffuser is designed for large spaces, and it does just that!

It is compatible with all essential oil types, including blends mixed in fractionated coconut oil, which cannot be diffused in conventional ultrasonic diffusers. It uses high-frequency atomization technology.

Using either 10ml or 15ml essential oil bottles, you simply screw them into the diffuser without any water.

Furthermore, I like that this diffuser is battery-operated, which means you can place it anywhere in your home. No cords to clog up your counter or need to be located near an outlet.

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7. ASAKUKI Essential Oil Diffuser with Remote Control

ASAKUKI Essential Oil Diffuser with Remote Control

For its impeccable, natural stylish appearance, I chose the Asakuki brand essential oil diffuser. It is an amazing multifunctional aromatherapy device. This diffuser is not only pretty, but it has all the features that other diffusers have too: timer modes, color modes, easy use, and auto shut-off. It also comes with a remote control so you can operate it from across the room.

It works great to run overnight with its low noise level and 12 hour runtime. If you run out of water, it automatically shuts off.

It is particularly nice that the light and mist modes of this essential oil diffuser can be operated separately. There are three buttons on the diffuser, so you can either use it as a simple night light, or without lights, and use it as a cool mist humidifier. Hooray for versatility!

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In addition to my recommendations, I have personally tested over 30 different essential oil diffusers and have learned a thing or two from them.


The best way to choose a diffuser is to set a price point for it. You can buy a great diffuser for $20 or spend over $200 for a fancy oil diffuser. Both will do the trick, and a cheaper price doesn’t necessarily mean that it won’t work well. A more expensive unit usually has a better warranty, is more unique, or is more stylish.


It’s important to consider the style of your diffuser when choosing. Some models feature the classic “vase” look, while others are more modern and unique. Diffusers typically come in black, white, or some kind of faux wood finish.


Most diffusers are made of plastic, even when they appear natural with faux wood patterns. Check the product specs to ensure that they are BPA-free before buying.


When purchasing an oil diffuser, it’s a good idea to check the warranty and returns policy. It can range from 6 months to 5 years.


When buying an oil diffuser for large rooms, double-check the plug-in it comes with. Most diffusers come with wall plug-ins, which are cords that connect directly to the diffuser. There are some oil diffusers that offer USB plug-in as an option. In that case, an adapter is usually required to plug them into the wall. Battery-operated diffusers are less common and usually state that they are portable.


The calcium and minerals in tap water leave a white dust on your diffuser. If you’re experiencing white powder inside your diffuser, you can use distilled water instead of regular water. But the best prevention is regular cleaning.

Regularly clean your diffuser to keep it working properly.

You can use gentle soap to clean your ultrasonic diffuser, or you can add a few drops of white vinegar and 1/2 cup of water, and then run it for a few minutes in a well-ventilated space. Rinse the diffuser thoroughly after cleaning. You can get into tough-to-reach spots with a Q-tip, such as around the ultrasonic disc, with a Q-tip. Here are detailed instructions on how to clean an essential oil diffuser step-by-step.

Generally, manuals recommend cleaning every 3-5 uses. I consider that a bit excessive. I clean mine about once a month, which is 20-30 uses. Make sure you read the diffuser’s owner’s manual before cleaning. It is important to follow the manufacturer’s instructions when cleaning your diffuser effectively. If there are any warranty issues, you will want to make sure you have followed the manufacturer’s instructions.


A diffuser for large rooms is not an easy task to find. It should have basic safety features and a creative design that fits into your home decor while also offering basic safety features. I hope my list of the best diffuser for large rooms has helped you see the differences in some of the features and options that these units have. Your final choice will certainly depend on your needs and preferences.

Let me know if you have any ideas or questions to share in the comments.

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