15 Best Essential Oil Diffusers for Large Rooms | Our Top Picks, Buying Guide & Tips

Best Essential Oil Diffuser for Large Room

The history of Aromatherapy and essential oils dates back to about 4000 BC. And since then, oil diffusers have come a long way.

Over the years, these devices are presenting innovative ways to cure various health problems in addition to improving your senses naturally.

If you want to add fragrance to your living environment without using those traditional candles and reeds, then electronic diffuser devices are best to use in your living rooms.

By switching the unit ON in your living room or bedroom, a pure mist of fragrance oil and smell (that makes the room entirely pro-healthy for users) is released, making the whole environment soothing.

Why Specialized Diffuser for Large Rooms?

Aromatherapy diffusers for large rooms are most preferred because they can spread the mist of refreshed fragrance to a wider area.

With their robust capacity and powerful motor, these can make your whole house scent without the need to place individual diffusers in every room.

The most exciting thing about using these large room oil diffusers is it comes with a built-in cool mist ultrasonic humidifier.

Therefore in places where pollution, allergens, and chilly weather along dry air are common, these devices can also be used as a humidifier-diffuser combo.

These humidifier and diffuser combo devices provide not only great aroma but also refreshed air with proper moisture all-around to relieve all the allergic symptoms of dry air.

You can use these extra-large ultrasonic aromatherapy devices just to rest assure that everyone in your family (including pets and kids) remains healthy and free from any type of breathing disorder all-round the year.

15 Best Essential Oil Diffusers for Large Rooms

Without any further delay, if you are planning to buy an awesome oil diffuser for large room, below are some of the best models and brands you may consider.

Unlike the heating-type oil diffusers, these electronic ultrasonic devices are safer to use as no smoke is developed.

Also, these come with a large water capacity which makes these extra-large aromatherapy diffusers much in demand.

1- URPOWER Oil Diffuser

Portable and small, this little gem is sophisticated enough to complement any décor.

This URPOWER diffuser with humidifier model is perfect for use in living rooms and even in the bedroom, where it can operate throughout the night without disturbing sleep.

You can keep this best aroma oil diffuser by your bedside to wake up feeling more alert and better rested, with more energy to get up and tackle the day ahead.

Some of the key features that come with this large room diffuser model are:

  • Large 500ml water tank to operate for about 10 hrs with one filling
  • A 3-in-1 device that functions as a Diffuser, humidifier, and LED night light
  • Ultrasonic diffusing technology that offers noiseless aromatherapy benefits
  • Comes with an auto shut-off feature, 4 timer settings, 45 days of money back, and 12 months warranty

2- VicTsing Oil Diffuser

VicTsing offers you another great option when it comes to buying the best large essential oil diffuser online.

With its large capacity, this BPA-free diffuser model can provide fragrance for a long and can cover an area up to 269-323sq.ft.

Ideal for spacious office, spa, salon, physical therapy studios, master bedroom (or just any other place), you can enjoy the ultra-quiet working of this ultrasonic diffuser anywhere/anytime you want.

The device comes with an option to choose your preferred mist mode (with a high/low button).

Also, it features a 4-timer setting (with 1H/3H/6H/Continuous modes) so that you never have to worry about the less fragrance in your room.

A few other features that come with this machine are:

  • 500ml capacity to run up to 14 hours
  • Waterless auto-off function for protection
  • Super modern wood grain decorative design
  • 7 soothing LED lights with dim and bright options

Above all, this exciting unit can serve you for a long and can be an excellent gift for your loved ones to décor their interiors and life.

Why not check this out and get one now?

3- Aromacare Oil Diffuser

Aromacare Large Essential Oil Diffuser is a perfect fit for Aromatherapy, no matter where you want to enjoy it.

As it comes filter-free, it is easy and safe to operate. It comes with an ambient dim light which provides you a soothing environment to relax all night long.

Also, its warm and soothing yellow light sets a unique positive vibe for business meetings or social gatherings. So do not forget to add one to your home or office décor.

Other unmatched features of this large-size diffuser unit are:

  • 600ml capacity to run up to 12-18 hours
  • 2 mist settings, waterless auto shut-off function
  • Dark wood grain decorative design for your décor

Overall as there is no heat involved in this Aromacare large-size essential oil diffuser, it’s a perfect alternative to scented candles or oil burners.

4- Levoit Oil Diffuser

Designed in California, Levoit offers you one of the best large room oil diffusers for families.

This is a device that comes with the ability to scent the rooms in addition to providing cool or warm moisture in dry seasons.

To enjoy the aromatic atmosphere around you just need to add a few drops of essential oils into the provided aroma box.

The diffuser machine then provided you with a clean, pure, and refreshing smell to soothe your senses.

While adding essential oils to the unit, care that you DO NOT add the EO into the water tank – it may cause leakage in the unit or may stop working.

A few other features of this LEVOIT oil diffuser are:

  • Large 6L capacity/ 36 hours of operation
  • Diffuser humidifier combo with humidity control
  • Sensitive touch control panel and easy to use the remote control
  • ABS plastic highly durable water tank – easy to refill and clean

In addition to all the above, this diffuser with a humidifier machine comes with 2 extra aroma pads and absorption pads to enjoy aromatherapy for a long without any worries.

5- ASAKUKI Oil Diffuser

ASAKUKI offers you one of the best gifts for essential oil lovers in the form of a premium quality 5-in-1 aromatherapy device.

Besides working as an essential oil diffuser, this device also functions as the best aromatherapy humidifier to provide you the improved air quality in all seasons.

No matter whether you want to keep your family protected (from excessively dry air, dust, and allergens) OR need to cover up the smell of pets (or smoking), this is a device that can do all for you.

Some of the best features that we love about this device are:

  • 7 different LED light colors
  • multiple mist nebulizer modes
  • 700ml water tank – large and easy to clean

Above all, this diffuser unit also features a safety auto-switch to prevent the device from overheating in case it runs out of water.

And to make your purchase risk-free, the company also offers you a 1-year warranty AND a 6-month money-back guarantee.

6- Signstek Oil Diffuser

Signstek oil diffuser is a worry-free model that can humidify and scent the environment (using water-soluble essential oils) without worrying about refills.

The device has an adjustable mist control feature and is super easy to clean.

A few additional features that I like in the device are:

  • Large 1500ml tank that lasts all night
  • Dual nozzle sprayer that can release super heavy mist
  • Whisper-quiet operation, changing LED lights, auto shut off

7- PureSpa XL Diffuser

Pure Enrichment PureSpa XL is an extra-large premium aroma diffuser model that comes with a 3-in-1 functioning humidifier, aroma diffuser, and an intelligent mood light enhancer.

Its stylish design complements your home décor while its powerful mist work to enhance the environment in your room.

A few other good features that come with this ETL-approved PureSpa XL diffuser model are:

  • Large 2000ml tank that lasts all night
  • Rainbow-spectrum mood light to enhance the ambiance
  • 5 Year Warranty with caring customer support 7 days a week

8- InnoGear Diffuser

InnoGear 500ml Aromatherapy essential oil diffuser provides you a touch of zen-style to your home and workplace with its natural plastic wood grain look.

This is, in fact, a beautiful craft of art piece that fits with any décor to give it a premium, stylish look.

Based on ultrasonic technology, it delivers whisper-quiet, smooth mist and pleasant aroma inside your room to make a calm relaxing environment.

A few other key features that we like in this InnoGear humidifier for the aromatherapy unit are:

  • 500ml capacity with auto shut-off feature
  • 4 time setting modes: 1Hr/3Hr/6Hr/steady on
  • 7 color mood lighting with bright and dim adjustability

Whether you want a humidifier diffuser combo device for your kids’ room or for creating a romantic environment in the bedroom, this is a unit you can rely on.

9- Samyo Diffuser

Samyo aromatherapy essential oil diffuser with air humidifier operates using ultrasonic technology to break up water and aroma solution into extremely fine micro-particles.

These particles then generate air anion to purify the environmental air in your room to make you feel relaxed, refreshed, and stress-free.

A few key features that I like in this model are:

  • Large 500ml water capacity to operate up to 10 hours
  • Color changing light and auto shut off when water gets low
  • 4 timer settings: 60 minutes, 120 minutes, 180 minutes, and ON

10- TaoTronics Oil Diffuser

TaoTronics TT-AH014 is a top-fill humidifier with an essential oil diffuser device that is ideal for bedrooms and other large spaces.

Due to its unique top filling feature, the device is easy to refill and clean from every corner.

Made up of high-quality antibacterial material, this TaoTronics humidifier for aromatherapy also prevents mold buildup in the unit to keep the misting air fresh.

Few other key features:

  • Large 5000ml capacity to last for up to 40 hours
  • Night mood light with waterless auto shut off for safety
  • Includes user guide, cleaning brush, and 12 months of customer service

11- Sztrokia 3D Diffuser

Sztrokia offers you a 2nd generation 3d essential oil diffuser that delivers a unique mesmerizing experience with its wonderful color-changing light show.

Not only it’s a premium diffuser to scent your home and a great piece of decorative artwork that can complement your home décor wonderfully.

A few other highlighting features of this aromatherapy humidifier diffuser combo are:

  • 300 ml capacity for up to 12 hours of mist
  • 3 misting modes with 24 color-changing relaxing lights
  • 12 months replacement warranty for worry-free purchase

Overall, Sztrokia 3d glass diffuser offers you an ideal environment to brighten your mood, relax and relieve stress.

It’s also a perfect aromatherapy Christmas gift for anyone who loves essential oils.

12- OliveTech Diffuser

OliveTech Essential Oil Diffuser comes with a beautiful & decorative wood grain design that is ideal for your room, office, yoga room, hotel room, etc.

Made up of BPA-free material, this diffuser with humidifier unit works quietly using ultrasonic technology to produce an ultra-fine smooth mist of vapors.

This scented moisture is a healing agent for your skin and airways in winters.

A few other good features that come with this aromatherapy machine are:

  • 400ml capacity for up to 12 hours of working
  • 4 timer, mist control, and auto shut-off feature
  • 7 Soothing LED Lights and 18 months of warranty

13- Secret Garden Diffuser

Secret Garden Essential Oil Diffuser by Royal Living is one of the most beautiful and decorative pieces you will love placing in your room.

Made of medical-grade plastic, this diffuser machine works with ultrasonic technology to provide a safe and clean fragrance without using any open flame or heat.

A few essential features that we like in the unit are:

  • 500ml capacity for up to 12 hours of mist
  • Misting speed customized according to personal preference
  • Multiple light settings for stress relief and mood enhancement

Above all, this Royal Living essential oil diffuser comes with a 100% satisfaction guarantee to make your purchase risk-free.

For a limited time, it’s available on amazon with promotional discount codes that can fetch you additional savings when buying.

So why not consider buying in bulk as a gift for your friends, relatives, or office staff this festive season?

14- Smart Wifi Diffuser

The smart Wifi wireless essential oil aromatherapy diffuser by Sierra Modern Home is compatible to work with wifi along with smart home automation devices like Alexa & Google Home.

Since it is one of the most intelligent diffuser-humidifier devices, it can be easily controlled with a phone app & voice.

With the help of a download companion app on your phone, you can easily control features like LED color, mist intensity, timer settings, scheduling, and much more.

A few exciting features of the device include:

  • 400ml capacity for up to 12 hours of continuous mist
  • Intelligently controlled with Alexa and Google Home devices
  • Can be scheduled to work at a fixed time of a day OR on days you choose

15- Homasy Aroma Diffuser

Homasy essential oil diffuser is made up of BPA-free material, so you need not worry about getting infected when you are buying a diffuser for your baby’s room.

Simply place it on your nightstand, and you are good to go to provide an allergy-free mist of refreshed air.

A few key features that come with the unit are:

  • 500ml capacity with up to 9 hours of working
  • 8-color mood light with exciting light modes
  • Ultrasonic, ultra-quiet, auto shut off, and 4 timer settings

Above all, the unit also comes with 45 days of money-back and a 12-month worry-free warranty so that you can enjoy the diffusion stress-free for the whole season.

How to Use an Aroma Oil Diffuser?

To get the most out of your electric aromatherapy diffuser for a large room, all you require is to use it properly with all care and affection.

Here are a few steps you need to follow:

STEP 1. Choose an appropriate location

After selecting the room, place your device on a flat solid surface, tabletop, solid shelf, or nightstand.

It is good to locate a power outlet and, if possible, place it near the center of your room so that the scent is distributed evenly around the area.

In general, you should avoid place which gets direct exposure to the sunlight or is near to the fan.

Since you are using water in your device for humidification, it is good to place a towel underneath. This will prevent the surface from getting damaged due to stagnant water (if any).

STEP 2. Fill the water

Once you have placed your device right, it’s now time to fill it with water. You can bring the reservoir close to the tap and fill it with clean, room temperature water.

If you are unsure about the quantity, you can refer to the user manual that may have provided you with details on how much water to use.

Ensure you do not overfill the water, which may leave your device non-functional.

STEP 3. Add your favorite essential oil

Now it’s time to add a few drops (5-10) of pure essential oils. You can either choose to have a single oil or can try an essential oil blend of your choice.

For me, 5-6 drops are enough to get a refreshing scent in my room. But if your room is large or in case you want a stronger smell, you can try adding a few extra drops.

STEP 4. Turn On the device and enjoy

After you have filled your device with water and essential oils, it’s now ready to get started. Place back the diffuser’s cap and plug in the device to turn it on.

If you have settings on your device (like timer, LED lights, etc.), just set the features based on your needs.

Within a few seconds, you can start enjoying the fresh feel in your room, even when it is not ventilated with windows.

Where to Put Your Essential Oil Diffuser?

While there is no such “ideal” place where you should put your oil diffuser, there are definitely a few guidelines you may follow while putting it in your room!

These will help you avoid the common leakage or spills while using the large oil diffuser machines that use water and essential oils.

First of all, when placing your oil diffuser, it’s better to put it on the table or a desk that is at least 2 feet above your bedroom floor.

Make sure that the table is placed at a distance of 3 feet from your bed to evenly spread the moisture and aroma into the room and not only near your bed.

You can also place them high on a stable shelf and not susceptible to any kind of accident.

The thing you need to care about is – just avoid placing the unit on top of (or very close to) wooden surfaces.

This is because the mist of droplets that carry essential oils from the unit can damage the wood furniture.

A few other tips for placing your diffuser at an ideal location are:

  • Place the unit on a non-metallic surface
  • Put a tray or any other water-resistant cover underneath
  • Do not place the unit on carpet or any other cloth that can get damp
  • Avoid keeping it near to window where there is a source of direct sunlight

Steps for Cleaning Your Essential Oil Diffuser

Before cleaning the diffuser, it should always be compulsorily removed from its power socket. Then follow the cleaning steps below:

  • First, partially fill the water tank, ensuring it does not cross the maximum line.
  • The next step is to remove the oils that got smeared inside the diffuser and spilled over on the outer area. For this, pure white vinegar of 10 drops should be added.
  • Switch on the diffuser and let it be on for 3 to 5 minutes for the vinegar and water combination to blend well so that it scatters on the whole diffuser for effective cleaning without leaving any spot untouched.
  • After this, the diffuser should be drained fully.
  • As an additional step to ensure complete cleaning, check every nook and corner of the diffuser and clean them with a cotton pad soaked in vinegar.
  • Wash thoroughly with normal water and drain it again.
  • The last step is to pat dry the diffuser with a dry towel or cotton balls.

Even though you can follow the above steps for cleaning the diffuser, it is best to approach the service center of your diffuser brand to get it cleaned hassle-free without your intervention.

If it is under warranty still, the best choice is to get it cleaned by a trained customer service representative.

If you are so inquisitive and want to do it by yourself, you can get the help of the diffuser cleaning manual that you got along with the product purchase and get it cleaned.

Some diffuser brands like Young Living Diffusers make the warranty void if they come to know that your diffuser gets cleaned by Vinegar or other elements other than those strictly given in the cleaning manual.

Should you clean the unit after every use?

Almost all of the diffuser brands give guidelines to clean the diffuser after every use, which many may find a time-consuming process.

But prevention is better than cure, and in reality, many don’t do it after every use due to sluggishness, saying it can be done another time.

But, practically speaking, that another time will never come until one realizes it is long overdue.

It is best to avoid the above mistake if you care about the performance, durability, and long life of the diffuser.

As the oils used in essential oil diffusers are corrosive, it is a good practice to cleanse them immediately after every use.

The odor of residual oil, when mixed with new oil, may affect the pleasant smell.

So, it is suggested to empty the essential oil diffuser after every use fully and clean it with a cloth before another use.

What Size Diffuser for Bedroom/Large Room?

Well, choosing the right size is one most important aspects – when you are buying a good aroma oil diffuser for your bedroom.

Most probably, while buying, you may have come across tank capacities ranging anywhere from 50ml to 500ml.

Also, there are extra-large ones that can go beyond up to 1000ml capacity.

The idea is not to pick the maximum size as it can cost you much higher.

Before picking one, determine the size of your room where you want to place the unit. And based on the size of the room you want to cover, get the ideal one.

For most families, 300ml to 500ml capacity is a good fit. You can go to it unless you have a very huge area to cover.

Remember that the machine you are selecting should be big enough to cover the area you are seeking to scent.

What Essential Oils to Use with Diffuser for Stress?

Now when you have chosen your favorite diffuser model, it is good to know about some of the best-smelling aromatic essential oils that can be used with the machine safely.

As pure organic aroma oils are expensive to buy, and not all of them are safe to use in a diffuser machine, you should do proper research before buying them online.

Here is a list of 10 essential oils that can be safely used with your room scent diffuser. These are best smelling and are also helpful in relieving your stress and depression.

Lavender Oil:

Pure Lavender oil is my top favorite as it not only helps in relaxing and unwinding but can also help to sleep well.

This oil is the most common and highly used oil to treat nervous disorders. When you inhale this, it breaks down the fast brain wave (which causes anxiety) and replaces it with a slow brain wave.

When buying make sure that you purchase only good quality Lavender oil (one which is high in esters and low in cineol).


This oil helps in releasing all the negative feelings that could lead to depression, insomnia, etc., if not released.

It has a fruity fragrance that calms the hypothalamus, directs your nerve energy away from addictive, unproductive behavior, and helps you relax.

It can be applied to the neck, back, and feet.

Rose Geranium:

This oil’s floral aroma gives a pleasant and enhanced relaxation feeling and helps balance your hormonal levels.

It stimulates the lymphatic system and relieves you from anxiety, depression, and stress.

Clary Sage:

This oil is best for nervous disorders like depression and anxiety.

Only using this oil cannot cure you completely, but it can help a lot while you are under treatment for such nervous disorders.


This oil calms the nerves and gives a wonderful, relaxed feeling, similar to the drug valium.

It increases the GABA activity in your brain and regulates the emotions of depression, anxiety, and excitement.

Sweet Marjoram:

This oil gives you a relaxed feeling by regulating blood circulation and also helps treat insomnia.

It can be combined with other oils for a better effect.

Wild Orange:

This oil helps lift your mood by improving blood circulation and detoxifying the gallbladder and liver.

Rub it on your neck, back, or feet to relieve anxiety and panic.

Roman Chamomile:

This oil smells sweet to fruity and effectively treats diseases like insomnia, vomiting, ADD (Attention Deficit Disorder), and restlessness.


It is considered highly valuable in treating anxiety, stress, fear, tension, and nervousness.


It stabilizes, grounds, and harmonizes your mind to treat depression, anxiety, exhaustion, nervous stress, and other stress-related conditions.

These oils, when used with aroma diffusers, effectively work on the right part of the brain and help diminish anxiety, stress, depression, and other related issues.

What to Look for When Buying a Room Diffuser Online?

No matter how much stress, bad mood, and tired you are, essential oils with the art of diffusion can easily calm your mind, body, and mood.

In case you are already planning to buy an excellent aromatherapy diffuser for your bedroom, living room, or the whole house, here are a few essential things you need to look for in them…


When shopping for a scent diffuser for a large room, you may come across various types with varied features.

While most of the large room diffusers utilize water for scenting and humidifying the air, few are there that do not use water or heat.

These come at an additional cost and can offer a few additional health benefits. Depending upon your budget and personal preference, you can choose the one that is most suitable for your family.


As you are looking to buy a perfume mist diffuser for a large room, you should essentially check for the reservoir or tank capacity of the unit you are buying.

A large reservoir in the machine (with 300ml or more) will allow you to get the fragrance mist for a longer period and is, therefore, suitable to buy.

Timer and Mist:

An inbuilt timer in your device allows you to set how long your diffuser should run before it gets switched off automatically.

For instance, if you want to diffuse the aroma oils in your bedroom all night while sleeping, you can set it accordingly with a low misting option.

This will slowly diffuse the fragrance (at a slow mist rate) to help sleep you better without worrying about your sleeping problems.

With a slow or high misting level, you can also set your machine to produce a high or low aroma, which should depend on where you keep the unit in your home.

LED and Night Light:

This is another good feature that you may not want to miss out on when buying a diffuser for your large king-size bedroom or living room.

Many people prefer having a dim light to get a soothing effect in the bedroom at night.

As colorful LED lights in your machine make it act as a night light, you never have to use additional lights in your room for sleeping.

Especially if you have children at home, you will find these oil diffusers for nursery helpful.

And the best thing is, being completely adjustable, you can set the brightness of the lights according to your liking or can even switch them off completely.

✓ Noise Level and Auto Shut Off:

Annoying noise that distracts your mind (while working or while sleeping) is a problem with much cheaper quality oil diffusing machines.

Hence the level of noise the device produces while working should also be considered while buying.

Additionally, it’s also important that your unit comes with all the safety features like auto shut-off.

This allows the machine to shut down automatically when they run out of water. This feature also ensures that your device doesn’t burn or waste electricity.

✓ In addition to all the above essential factors in your diffuser model, it is also important that you choose the best reliable store for buying one.

Although most of the aroma diffuser dealers or manufacturers have their official websites, I personally prefer buying at stores like Amazon as they offer various discounts and coupons for making an affordable purchase.

The room fragrance diffuser machine they sell is not only branded, high quality, and affordable but also has a proper warranty.

I have recently bought a URPOWER diffuser here and am feeling in love with it. This works not only great but also looks beautiful in my room!

In case you are not interested in doing much research, you can consider this machine without any second thought.