As discussed on the How To Home Podcast, essential oils have many uses around the home. If you have particularly large rooms in your home, though, you may have noticed that they can be a challenge for some essential oil diffusers. With smaller and low-powered models, the fragranced mist doesn’t travel very far, so you’re often left unable to feel the benefit across the room. Therefore, to effectively diffuse essential oils throughout a larger space, you’ll need to buy a diffuser which has the capacity and run-time to match.

We know how frustrating it can be when products don’t meet our expectations. That’s why in this article we’ve narrowed down a selection of some of the best large room essential oil diffusers to five of the most outstanding models. We’ll go over their features and benefits in detail to help you choose the best model for your needs. If you’re new to the world of essential oil diffusers, we’ve included a useful buying guide to essential oil diffusers towards the end of this article so you can find out all you need to know before making your final purchasing decision.

  • Max 20 hours runtime
  • 1-liter capacity
  • Adjustable mist
  • Night light
  • Waterless auto shut-off
  • Variable timer
  • One-year warranty

  • Max 12 hours runtime
  • 550ml capacity
  • Timer setting
  • Variable mist
  • Waterless auto-off function
  • Color-changing light up band
  • One-year warranty

  • Up to 20 hours runtime
  • 1.5-liter capacity
  • Seven lighting options
  • Fully adjustable mist level
  • Waterless shut-off
  • One-year warranty

  • 20 hours + runtime
  • 700ml capacity
  • Color-changing, brightness-adjustable LED light
  • Auto shut-off
  • Timer
  • One-year warranty

  • 50 hours run time
  • Two-liter capacity
  • Color-changing mood light
  • High/low mist settings
  • Waterless auto-off
  • Five-year warranty


This essential oil diffuser by Urpower is an extremely popular appliance and a great oil diffuser for bigger living areas. Designed for use as both a night light and humidifier, this essential oil diffuser for large rooms will ensure an excellent night’s sleep thanks to its large one-liter water capacity and run time of up to 20 hours without refills. The adjustable mist modes with a choice of high or low mist output allow you to scent and humidify any large room to your requirements.

For bedroom use or for winding down after a stressful day, the color-changing LED light adds an extra element of relaxation, while the timer function allows you set your essential oil diffuser to run for a choice of three, six, or nine hours (plenty of time to fill a large space with aroma). Plus, the waterless shut-off function also means you can leave this oil diffuser to get on with hydrating and scenting your home without worrying about what will happen if it runs dry.

A fantastic essential oil diffuser for any large room or bedroom, this model has all of the features that you need, combined with a large capacity. The included remote control does beep rather loudly, though, which you may find slightly irritating when cycling through the options. In addition, even with the night light function turned off this diffuser gives off a faint glow, so if you need complete darkness to sleep well this may not be the best essential oil diffuser for your bedroom.

Pros

  • Up to 20 hours runtime
  • 1-liter capacity
  • Adjustable mist mode
  • Night light function
  • Waterless auto shut-off
  • Variable timer

Cons

  • Remote control beeps loudly
  • Slightly light when turned off


This large room essential oil diffuser by BZseed is a stylish model that is perfect for humidifying dry winter air with a touch of fragrance. It can be used it in any large room for sinus relief, dry skin relief, or just simple ambiance. Its 550ml water capacity and run time of up to 12 hours give this essential oil diffuser the ability to diffuse the aroma of essential oils over a large area and will improve your comfort levels wherever it is placed.

Additionally, the variable mist control makes it easy to speed up the level of mist production for a more rapidly scented area. Use it as a bedroom essential oil diffuser overnight thanks to its handy timer function, or set it to scent your home throughout the day. No matter how you use this large room essential oil diffuser, the waterless auto-off function ensures that you don’t have to worry about it running dry.

Featuring a, color-changing light up band, this essential oil diffuser is discreet yet decorative and you can turn off the light function for use while you sleep. Although it is easy to use, bear in mind that you may have to spend some time pressing the buttons to get to your required option. Also, be sure to place this model in an easily accessible place as there is no remote control.

Pros

  • Up to 12 hours runtime
  • 550ml capacity
  • Timer setting
  • Variable mist control
  • Waterless auto-off function
  • Color-changing light up band

Cons

  • Multiple button pressing
  • No remote control

Suitable for very large rooms, this Exqline essential oil diffuser has a large 1.5-liter capacity with up to 20 hours of run time, making it perfect for scenting and humidifying any part of your home. Unlike other large room aromatherapy diffusers, this model features a fully adjustable mist level that can be increased or decreased just to your personal liking using the rotating dial. This handy appliance makes a great aid to relaxation and also doubles as a lamp with seven ambient lighting levels. The waterless shut-off function makes this essential oil diffuser even easier to use as you won’t have to worry about turning it off when water levels are running low.

While this is an excellent large diffuser, it does not offer a timer function. So, if you’d like to moisten dry air and perfume your home for a set amount of time, then you may be better off checking out some of our other large room essential oil diffuser reviewed in this article. In addition, be aware that the power cord on this model does not unplug from the unit, so extra care is required when moving and cleaning this model.

Pros

  • Up to 20 hours run time
  • Large 1.5-liter capacity
  • Seven light options
  • Fully adjustable mist level
  • Waterless shut-off function

Cons

  • Cannot unplug power cord
  • No timer setting

This large room essential oil diffuser from Urpower features a modern square design with a 700ml capacity. Although it isn’t a dedicated humidifier for aromatherapy, this unit is plenty big enough to scent any room in your home while also alleviating any symptoms caused by dry winter air and heating, such as dry skin and coughs.

With over 20 hours runtime and a timer setting function, this essential oil diffuser can therefore be left on long enough to perfume a larger space  It doesn’t require frequent refilling and you can simply fill it up, switch it on, and set it to run either continuously or for one, three, or six hours. Thanks to its auto shut-off function, you won’t have to worry about leaving it running as it will automatically turn itself off when it runs out of water.

While this aromatherapy essential oil diffuser is a valuable relaxation aid thanks to its color-changing LED light function, you may find that the light is a little too bright for a bedroom setting, even when using the dim option. If this is an issue for you, though, the light function can be turned off and doesn’t impact upon the diffusers performance.

Unfortunately, the included product usage instructions are not easy to understand, so you may need to try a little trial and error to get this large room essential oil diffuser to run on your desired settings.

Pros

  • Over 20 hours run time
  • 700ml capacity
  • Color-changing, brightness-adjustable LED light
  • Auto shut-off function

Cons

  • Poor usage instructions
  • Bright light

If you’re looking for an essential oil diffuser with an extra large capacity, then check out the Pure Spa XL from Californian-based company Pure Enrichment. With its generous two-liter capacity and up to 50 hours of  run time, the PureSpa XL can be used for long periods without refilling and is perfect for any home that has large rooms plagued by dry air.

Choose from either low or high mist settings to scent and moisturize the atmosphere in your home as needed. Aside from improving your dry skin and sinuses, the PureSpa XL is also a fantastic way to promote relaxation and inner wellbeing, gently scenting large rooms with the fragrances of your favorite essential oils. The PureSpa XL can also be used as a mood light, helping you to destress and relax. The color-changing rainbow light can be used either alongside the oil diffusion function or as a stand-alone lamp.

While this is a popular and attractive oil diffuser, unfortunately, it does not benefit from a timer function. This means that unless you turn it off, the diffuser will continue to run until the entire two liters have been used up, which may not be a bad thing if your aim is to fragrance large spaces within your home.  Another thing to note is that the fill hole is rather small on this model, meaning that you may find filling it up and cleaning it a little difficult.

Pros

  • Up to 50 hours run time
  • Two-liter capacity
  • Color-changing mood light
  • High and low mist settings
  • Waterless auto-off function

Cons

  • No timer setting
  • Small fill hole

Comparison Chart

FEATURESUrpower Essential 1000ML Oil DiffuserBZseed 550ML Essential Oil DiffuserExqline 1500ML Aromatherapy DiffuserUrpower Square 700ML Essential Oil Diffuser.Pure Enrichment PureSpa XL
Dimensions (inches)6.5 x 6.3 x 5.7 7.3 x 6.5 x 7.35.7 x 5.7 x 9.56.5 x 6.3 x 5.714 x 6.4 x 6.3
Capacity (ml)700550 15007002000
Run Time (hrs)<20<12<2020+<50
Adjustable Mist
Mood Light
TimerXX
Auto Shut-Off
Weight (lbs)1.6 1.633.021.61.75
Warranty1-year1-year1-year1-year5-year

Buyer’s Guide:

Essential Oil Diffusers

In the stressful world in which we live, almost everyone can benefit from using an essential oil diffuser. Using an essential oil diffuser is a great way to boost your mood, aid relaxation, and combat stress. The aroma of your favorite essential oils will also make your home feel more inviting and gently scent your possessions and soft furnishings for a home that radiates with good vibes.

Many homes with larger rooms will struggle to feel the benefit of standard sized oil diffusers. These often lack the power and reservoir capacity to effectively disperse enough mist over a larger area. Essential oil diffusers for large rooms, however, can be used in any large room in your home, including your child’s room, to help all family members to relax and unwind.

When you’re buying an essential oil diffuser specifically for use in large rooms, there are certain features that are well worth looking out for. Take a look at some of our must-have essential oil diffuser features.

Capacity

Large essential oil diffusers can be found in a wide range of sizes.When choosing an essential oil diffuser for large rooms, however, water capacity is perhaps the most important consideration. Large rooms, by default, have a greater surface area and will, therefore, require a greater quantity of mist to be released before the aroma of the essential oils becomes noticeable.

Any diffuser with a capacity less than 500ml is unlikely to effectively cover a large room with a single fill. If you don’t want to have to refill your essential oil diffuser, then select one with a large capacity of at least 700ml.

Run Time

The maximum runtime of your aromatherapy oil diffuser will directly depend upon its capacity and any variable mist settings it offers. For example, lower mist diffusion rates will enable the water in the diffuser reservoir to last longer than when used on a high mist diffusion rate. Longer run times of 12 hours of more are important if you have a large room or business space which you would like to easily infuse with the scent of essential oils. This means you can simply switch the diffuser on and leave it to do its job without having to think about it.

Timer

Unless you’re planning on leaving your essential oil diffuser running continuously, a timer function is a convenient setting to have. You may be planning to use your essential oil diffuser for set periods of time, for example, during sessions at a yoga studio, or for shorter periods in a large space such as an office or store. Being able to run your essential oil diffuser for set periods of time allows you to have greater control over humidity and fragrance levels in the room, as well as reducing the amount of essential oils that you’ll go through.

Auto Shut-Off

Purchasing a model with an auto shut-off function is a smart move. This will allow your essential oil diffuser to turn itself off once all of the water in the reservoir has been used up. Not only will this stop you from wasting energy, it will also prevent the appliance from damaging itself trying to run on empty. This is especially useful if you are using a diffuser in a large and busy commercial space, where you are likely to forget about turning the diffuser off at the end of the day.

Pros:
  • Larger Water Capacity  – Since large essential oil diffuser have a greater water capacity, they have much longer run-times and require less refilling than standard sized diffusers. This makes them the perfect choice for larger rooms or commercial spaces, as you can fill them once in the morning and leave them to do their work all day long.
  • Aid Relaxation – Using a large essential oil diffuser is a great way to relax. Whether you select a model with a soothing mood light, or just enjoy the aroma of your favorite essential oils delicately scenting your home, using your large essential oil diffuser is a great way to combat stress within big spaces.
  • Relieve Sinus Problems – While not as effective as whole house humidifiers, your large essential oil diffuser can also help to relieve congestion and other sinus problems that are exacerbated by the dry air found in heated and cooled homes or commercial spaces. Smaller, standard-sized diffusers will not be capable of humidifying larger rooms.
  • Soothe Dry Skin – If you find that you suffer from dry skin caused by a lack of moisture in your home, then using a large essential oil diffuser can help to rehydrate your skin, preventing it from losing moisture to the surrounding air. Large rooms will not feel the benefits of standard-sized oil diffusers, so using a model which is powerful enough to provide the required coverage is beneficial. This can noticeably improve your complexion and relieve any peeling or itchy areas caused by a low humidity level in your home.
  • Help Encourage Sleep – If you have a large bedroom, using an essential oil diffuser capable of covering large areas can help you to relax and drift off into a restful sleep. The aroma of the essential oils will calm the mind, while the mist helps to open the airways and enable you to breathe comfortably.
Cons:
  • Less Suitable for Damp Rooms – If your home suffers from dampness, then you will probably be best advised not to use an essential oil diffuser in areas suffering from high humidity levels.
  • Require Greater Quantities of Essential Oils – Due to their larger capacities, large essential oil diffusers will require more drops of essential oil to be added to the water so that the scent is perceptible when diffused. High-quality essential oils, or those derived from particular materials such as sandalwood, can be very expensive. Therefore, depending on the type of essential oil you wish to use in your diffuser, the purchasing of oils may become quite expensive over time.
Essential Oil Diffusers For Large Rooms

Pros

  • Larger water capacity
  • Capable of covering a greater area
  • Perfect for commercial spaces or large rooms with high ceilings
  • Long run-times
  • Assist relaxation and combat bad odors

Cons

  • Require more essential oil which may become expensive
  • Larger volume of water can be difficult to clean up if knocked over
  • Not very suitable for rooms which suffer from damp issues
Standard-size Essential Oil Diffusers

Pros

  • Great for standard-sized rooms
  • Don’t need much essential oil
  • Some models double as a mood light
  • Assist relaxation and combat bad odors

Cons

  • Not powerful enough to fragrance large spaces
  • May require re-filling several times a day
  • Shorter run-times

We have the answers to some of the most commonly asked questions about essential oil diffusers for large rooms:

  • Are essential oil diffusers for large rooms noisier than standard diffusers?
  • Generally speaking, large room essential oil diffusers are very quiet to run. They make use of ultrasound, so you won’t hear a lot of noise from your essential oil diffuser. Some people, though, are very sensitive to noise and are affected by even the slightest of sounds. If this sounds like you, you may want to stick to using your aromatherapy oil diffuser during the day rather than at night or else locate it further away from where you sleep. Some people find that the very slight noise given off by large essential oil diffusers is actually rather soothing and helps them to relax and to get to sleep.

  • Can large essential oil diffusers cause damp walls?
  • Even though they have a larger capacity than standard essential oil diffusers, when used correctly, large essential oil diffusers will not cause damp walls. If your home or commercial space tends to suffer from excess moisture build up, use essential oil diffuser on a low mist function with a timer setting. If you have any concerns about moisture levels in large rooms when using your essential oil diffuser, then purchasing an inexpensive hygrometer can help you to regulate your home’s moisture levels so that you to enjoy all of the benefits of your essential oils without any excess moisture worries. These devices accurately measure the humidity in the room, so you can keep track of the atmospheric changes made by your diffuser.

  • Do essential oil diffusers for large rooms use a lot of power?
  • No, large essential oil diffusers use very little electricity. Even though they are higher powered and have a greater water capacity, your annual electricity bill would likely be less than one dollar extra for using a 12W essential oil diffuser for one hour per day, every single day of the year! So, when fragrancing your large rooms or office spaces, you won’t have to worry about a nasty shock when your power bill arrives.

  • Do I need to use more essential oil in a large room diffuser?
  • It all depends upon your personal preferences and the quality of the essential oils that you are using. As a benchmark, you’ll probably want to use between 3-5 drops per 100ml, but this will depend upon your sense of smell. Start off with a smaller number of drops and then if you feel the need to add more you can progressively add extra essential oils until you reach a level that is best for you and your home. While it can be tempting to add a greater quantity of essential oils due to the larger size of the diffuser, this progressive approach will stop you from wasting essential oils by adding more than is necessary.

Final Thoughts

Essential oil diffusers are an invaluable aid for relaxation. They can also be used as humidifiers, helping to relieve a range of health problems that are commonly exacerbated by our winter heating and summer cooling systems. Dispersing your favorite essential oil aromas around your home, aromatherapy oil diffusers for large rooms can help you to destress and unwind the tensions caused by the busy pace of modern life.

Although all of the essential oil diffusers we reviewed make great options, we rated the Urpower One Liter Essential Oil Diffuser as our top choice. Its generous one liter capacity makes it a good choice for large rooms and long run times. The handy timer setting is a great additional function allowing you to run your diffuser for a set period, too. We also liked the relaxing, color-changing mood light, while the handy remote control made this one the easiest to use of them all.  

If you’re on a tight budget, though, we’d recommend the 550ml Aromatherapy Oil Diffuser by BZseed. It has all of the basic functions you’ll need, such as a timer and variable mist control. Thanks to its smaller capacity, you won’t need to use as much essential oils as with larger models to achieve the same sensory effect. With its gentle color-changing light band and stylish wood-effect exterior, this budget essential oil diffuser is sure to complement any home decor, whilst helping you to relax.

No matter which model you choose, this article has shown that a large room essential oil diffuser will complement your home and help make it a more relaxing and comfortable environment for the whole family.

Further Reading

object(WP_Term)#2438 (10) { ["term_id"]=> int(310) ["name"]=> string(26) "Health & Personal Care" ["slug"]=> string(6) "health" ["term_group"]=> int(0) ["term_taxonomy_id"]=> int(310) ["taxonomy"]=> string(8) "category" ["description"]=> string(430) "We’re sure you’ll agree that taking care of ourselves should be high on our priority list. Given our busy lifestyles, though, having the right gadgets and appliances makes healthy living much easier to achieve. Whether you’re looking for a juicer, body fat scale, or allergy-fighting vacuum, our team has scoured the market to find the best products to boost your health and wellbeing." ["parent"]=> int(0) ["count"]=> int(26) ["filter"]=> string(3) "raw"} 310
object(WP_Term)#2435 (10) { ["term_id"]=> int(3) ["name"]=> string(11) "Humidifiers" ["slug"]=> string(10) "humidifier" ["term_group"]=> int(0) ["term_taxonomy_id"]=> int(3) ["taxonomy"]=> string(8) "category" ["description"]=> string(384) "From warm mist to cool mist and ultrasonic to evaporative, we have sought out and thoroughly reviewed a huge range of humidifiers so you can find the right match for your needs. Whether you’re struggling with a cold, suffering from allergies, or the dry air is simply playing havoc with your skin, read on to discover the models we recommend. " ["parent"]=> int(304) ["count"]=> int(50) ["filter"]=> string(3) "raw"} 310
Humidifiers