One of the best ways to enjoy staying in a house is to have good air quality. Essential oils come in handy for people who want to relax in the house by creating a sweet fragrance. In addition, patients with challenges like nausea, stress and pain can use essential oils for aromatherapy and other benefits. The challenge comes when they have to serve a large room. However, you do not have to worry about that because we will look at the best oil diffuser for a large room worth your money by creating a conducive environment around the house.


What is an Oil Diffuser?

For an essential oil to be dispersed into the atmosphere, molecules need to be broken down into smaller particles that can be evenly dispersed into the air in the room. Therefore, the best essential oil diffusers allow comfortable oil concentrations for maximum effect and mindful usage. In addition, the diffusers are made to appropriately serve rooms of different sizes by releasing enough essential oils at the required interval. Now that we know what a diffuser does, we will look at the best essential oil diffuser in the market to keep your house fresh at all times.

Which is the best oil diffuser for a large room?

Best Essential Oil Diffuser

1. InnoGear Essential Oil Diffuser

InnoGear Essential Oil Diffuser, Upgraded Diffusers for Essential Oils Aromatherapy Diffuser Cool...
  • Compact Size for Space-saving: Diffuser is...
  • 2 Misting Modes: You can set the deffusor to...
  • PP Material and Cool Mist: Using PP material,...
  • Romantic Mood Light: InnoGear essential oil...
  • Waterless Auto-off: You can enjoy a restful...

InnoGear has the best oil diffusers for large spaces because of their unmatched efficiency and quality diffusers. The InnoGear diffuser is a cool-mist diffuser that uses pp material to stream mist at room temperature, providing ideal coverage of any room. The diffuser has two misty modes that you can pick from according to your preference. You have an intermittent setting and a continuous setting at your disposal. The continuous setting diffuses the oil until water runs out. The aroma diffuser will keep your house fresh all night without you worrying about anything else.

InnoGear Essential Oil Diffuser has a waterless automatic shutoff feature that ensures the diffuser does not overheat. Other features include color moods that add to the ambience of the room. The diffuser has 8 color options to pick from. The brightness of the diffuser is dimmable, adding to the versatility in creating an ambience that is vital for good mental health. The diffuser has a compact size that can fit in your hands, meaning it can fit on tiny spaces and shelves comfortably.


  • Aromatherapy essential oil diffuser
  • Compact size
  • Dimmable light
  • 8 light modes
  • Two modes


  • Essential oils are corrosive to plastic parts.

2. Ultimate Aromatherapy Diffuser

Ultimate Aromatherapy Diffuser & Essential Oil Set - Ultrasonic Diffuser & Top 10 Essential Oils -...
  • The Complete Bundle - Our Essence Diffuser...
  • Ancient Therapies Delivered As Intended By...
  • 10 Essential Plant Oils - Our Top 10...
  • No Additives or Fillers - Absolutely zero...
  • What's Included – 1 ultrasonic essence...

True to its name Ultimate diffuser is the ultimate choice you can pick when looking for a diffuser. The product is good looking and has relaxation written all over it. The diffuser uses wave diffusion to evenly distribute the 400 ml aromatic essential oil to provide a relaxing environment. To add to the relaxation, the diffuser has 7 light modes with 14 combinations and two intensity settings, giving you a complete package for ambience.

Ultimate aromatherapy diffuser comes with an essential oil set to start you off without a hassle. The wooden diffuser looks good and compliments your space, making your meditations more natural. The essential oils that come with the diffuser are a variety and are contained in amber jars to keep the UV light away and ensure the oils stay in their most potent state. You get ten different natural essential plant oils to refresh the atmosphere every single day.


  • The set comes with essential oils
  • Wooden material to withstand corrosion
  • Good-looking
  • 14 light combinations
  • Perfect gift


  • If the oils provided are outside your preferences, they might go to waste

3. ASAKUKI Oil Diffuser

ASAKUKI 500ml Premium, Essential Oil Diffuser with Remote Control, 5 in 1 Ultrasonic Aromatherapy...
  • 5-IN-1 AROMATHERAPY DEVICE: This ultrasonic...
  • ULTRA-QUIET FAN: With the upgraded...
  • CONVENIENT REMOTE CONTROL: Our diffuser comes...
  • BPA FREE MATERIAL: The diffuser is made of...

ASAMUKI brings the capacity to the table. The ultrasonic diffuser has a 500 ml tank capacity to keep the room fresh for as long as possible. The diffuser has a mute function that keeps you grounded during meditation and not distracted by any noise. The diffuser is eco-friendly and is suitable for anyone going for a more nature-inspired environment. The diffuser's 500 ml water tank ensures that the room is sufficiently freshened for the occupants to enjoy their stay.

The diffuser shuts off automatically to prevent overheating. Furthermore, 7 LED light colors on the diffuser add to the ambience, creating a suitable environment for meditation. The diffuser has a 1-year warranty that is proof that ASAKUKI is a reliable brand. The diffuser is a great gift idea for both yourself and your loved ones because it shows how much you have them in mind. Hint, do not wait for an occasion to gift them.


  • 500 ml water tank capacity
  • Silent
  • 7 LED light choices
  • Quality materials
  • Automatic shut off feature
  • Eco-friendly
  • Aromatherapy scent coverage
  • Covers 300 sq. feet of space


  • Water reduces the potency of the essential oils.

4. Homeweeks Oil Diffuser

Homeweeks Diffusers, 100ml Colorful Essential Oil Diffuser with Adjustable Mist Mode,Auto Off Aroma...
  • WHAT YOU GET--1* diffuser, our worry-free...

Homeweeks is a perfect diffuser for an ultramodern interior design. The diffuser looks sleek and straightforward enough. The LED-lit diffuser will change the vibe in the entire room. You can achieve a high or a low mist setting with two mist settings to suit your preference. The auto shut off function makes the diffuser safe for use at night without the risk of overheating. The diffuser is portable, and you can bring it along to your trip so that the atmosphere is familiar everywhere you go.


  • Portable
  • Color changing LED light
  • Sleek design
  • Adjustable mist level
  • Diffuser covers entire room evenly
  • Can run up to seven hours


  • Water dilutes oils

5. Pure Enrichment PureSpa Oil Diffuser

Pure Enrichment PureSpa Essential Oil Diffuser - Compact Ultrasonic Aromatherapy Diffuser, Natural...
  • RELAXING AROMATHERAPY: Premium diffuser...
  • GREAT FOR LARGE BEDROOMS: Refreshes and...
  • SOOTHING MOOD LIGHT: Optional color-changing...
  • WHISPER-QUIET OPERATION: Gentle, whisper-like...
  • WHAT YOU GET: PureSpa essential oil diffuser,...

Pure enrichment lives up to its name by diffusing your favourite essential oil and organic aromas for your relaxation and wellbeing. The diffuser has a design that looks relaxing and inviting, getting rid of any stressful thoughts that you may have. The diffuser offers a quiet operation that ensures you are only focusing on what matters most at the moment, be it work or meditation. The light feature adds to the ambience because it is adjustable.

The diffuser has a water measuring cup to ensure you achieve the correct ratios to avoid diluting the oils too much. The diffuser is the easiest option to blend with your interior design to have a relaxed look for the house and a relaxed mind.


  • Sleek
  • Automatic shut-off feature
  • Aromatherapy diffuser
  • Colorful night light
  • Suitable for an ample space
  • Large tank
  • 2-year warranty


  • Hard water is not suitable for the diffuser.

Types of Essential Oil Diffusers

There are four types of essential oil diffusers to choose from. The difference is mainly in each essential oil diffuser's technique and the intensity by which the diffuser disperses the essential oil. The size of the room will play a massive role in deciding the essential oil diffuser you will go for.

a) Humidifying/Ultrasonic Essential oil Diffuser

For an essential oil diffuser to work efficiently, the essential oil needs to be broken down into smaller particles that can be diffused evenly and adequately. Ultrasonic diffusers work by using vibrations to create a fine mist that can then be diffused efficiently in the room. Continuous mist is achievable when the molecules are broken down into consistent sizes that the essential oil diffuser can then disperse.

The essential oil needs to be released into a mist, and the ultrasonic diffuser does that by using electronic frequencies. Therefore, the oil needs to be mixed with water for the method to take effect in evenly distributing the essential oil. Therefore, an ultrasonic diffuser can be compared to a cool-mist humidifier because of the similarity in adding moisture to the air.

b) Nebulizing Essential Oil Diffuser

Nebulizing oil diffusers work by using pressurized air to disperse the essential oil into the air. Due to the dispersion method, the essential oil diffusers do not require the oil to be mixed with water for diffusion to be possible. Therefore, nebulizer diffusers are low maintenance because they do not need heat or water and is a good option for anyone on a budget. The essential oil diffuser uses a vacuum to pull oil to the surface of the diffuser, leading to a burst of aromatic oil into the atmosphere. For anyone who is eco-conscious, a nebulizing diffuser is an excellent option because it does not have any plastic parts in most cases.

c) Evaporative Essential Oil Diffusers

In its evaporate state, essential oil is diffused more readily and easily than oil in its liquid state. An evaporative oil diffuser has a fan that turns the oil into gas before being distributed into the room. The essential oil diffusers are perfect for anyone who needs a quick refreshing. The downside to the diffusers is that they do not release the essential oils in their most potent form.

d) Electric Diffusers

Electric oil diffusers are also known as heat diffusers. The diffusers are best known for their silence, which comes in handy for people who might not stand the sound of a fan in other types of diffusers. However, the diffusers use heat to disperse the oil and are not the best diffusers to retain the integrity and potency of the oil since the heat breaks down the oils. Heating oil changes not only the physical properties but also the chemical properties.

What to Consider Before Buying an Essential Oil Diffuser

i) Room Size

The room size is a huge factor when considering buying a diffuser. Oil diffusers for large rooms are rated in terms of the size of the room in square feet that may be appropriate for the diffuser. The size of the room also determines how long it will take for the oil to fill up the room evenly. Large rooms take longer to fill than smaller rooms. You can play around with the water to oil ratio to achieve the results you prefer, especially when using a diffuser with ultrasonic technology. Evaporative diffusers may be a little too loud for smaller rooms because of the fans that may distract your sleep or concentration.

ii) Type of Diffuser

Diffusers come in different types and forms. As we have discussed above, there are generally four types of diffusers to choose from. Your preference will determine the type of diffuser you settle for. Evaporative diffusers will be more suited for larger rooms during diffusers with ultrasonic technology for smaller spaces because they use oil mixed with water, reducing the concentration that may be ineffective for large rooms. Nebulizing diffusers are cheaper to maintain and use and are ideal for anyone on a budget.

iii) Oil Type

Some diffusers use only pure essential oil, which varies from oils mixed with water. Even a few drops of water change how a machine would diffuse essential oils. Essential oils cause corrosion to plastic over time, and therefore you need to be careful what kind of oil you are putting in your diffuser. Most nebulizing diffusers do not have plastic parts, making them more useful with oils that are more potent and potentially corrosive to plastic.

iv) Ease of Cleaning

Not all the pure essential oils in the diffuser will be broken down, and some remain as residue that sticks on the diffuser. Diffusers that are difficult to clean will soon build up too much residue that might contaminate the new oils to be diffused into a room. Just like any other surface, dust settles on the diffuser over time. A clean diffuser will last longer and function more efficiently with time.

v) Technology

The best essential oil diffusers have the latest technology that increases efficiency and ease of use. Features like a remote control make it possible to have the oil diffuser in any spot in the room. An aromatherapy essential oil diffuser would need an efficient diffuser to meet the functional requirements. For the efficiency to be at its highest, a diffuser with a timer is better to make the most of the essential oil without any wastage.

Diffusers with mist settings make it easier to decide how much mist is given off at any particular point. You can choose between a high mist mode and a low mist mode, depending on your preference. A diffuser with a night light adds to the ambience of the room while simultaneously making the atmosphere fresh and relaxing, adding to the health benefits. A great diffuser has an auto shut-off feature and timer settings that ensure no oil is wasted when no one is in the house or when you forget to turn the diffuser off.

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