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Best Essential Oil Diffuser for Large Rooms & Buying Guide

It is ready to relax you and to be a part of your living space.

Have you ever thought about how important the air we breathe for us? If you have not, we guess you are going to think about it by Essential Oil Diffusers.

Breathing is one of the most vital mechanisms of the human body. During breathing, besides the blood is being cleaned with the oxygen, the smell cells send impulses to the brain. These impulses have positive or negative impacts on our mental state, health, etc.

When you think a little bit about it, you will agree. Remember, the tranquility emotion felt when you smell a loved one or when you smell the greenery during raining.

Essential oil diffusers make your life more qualifier by getting advantage of the power of smell. But how? You are going to learn it in our review. Also, if you wonder which one you should buy for large rooms, you are in the right place.


Essential Oil Diffusers are devices that allow us to inhale essential oils by distributing them into the air using various methods, depending on their type.

Now you must be asking, “What are these essential oils?” 

Essential oils are fragrant, volatile, and aromatic compounds obtained by various methods from different parts of plants such as flower, fruit, seed, and root.  It is started to be used for treatment in the 17th century, and it continues to be used these days. 

Nowadays, while some people give preference to essential oils to find natural solutions to their health issues, some people use it because only they want their homes to be beautiful smelled. There are three ways to use these oils: by inhaling, orally, by contacting the skin. Inhaling is the most preferred option among these three.


A sense of smell is the only sense that cannot be shut down. It works 24 hours and affects 75 percent of daily behaviors.


#1 Best Tank & Silence: Everlasting Comfort Humidifiers

High capacity reservoir (6 Liter): Don’t have to fill it as frequently.

#2 Best Design & Atmosphere: BZseed Essential Oil Diffuser

Decorative thanks to its realistic wood appearance.

#3 Best Mist & Aromatherapy: Aromis Aromatherapy Diffuser

It does not need water to work.

#4 Best Price, Portability & Light: InnoGear Essential Oil Diffuser

Best essential oil diffuser for your budget.

#5 Best Usefulness: Aroma Essential Oil Diffuser

1.5 Liter Water Tank: Don’t have to fill it at short intervals.



There is no doubt that the quality of sleeping significantly affects our efficiency of activities in the day. We ask someone, “Did you not sleep very well last night?” when he/she seems not concentrated on her/his job. If you see someone who complains about their sleeping problems or wants to enhance their sleeping quality, you can suggest “Essential Oil Diffusers.” Numerous research has shown that inhaling essential oils has considerable effects on sleeping. It soothes you and makes you feel relieved and rested. Hence it leads you to sleep better.


It is seen that some essential oils influence brain activities such as learning, memory, and thinking. Due to impulses sent by smell cells, the human brain stimulates itself and makes an increment in the capacity of what it can do.

If it is a diffuser that only works with essential oil(nebulizing diffuser), it might be heavy for the baby. So, It is recommended that ultrasonic diffusers should be used by 1 percent oil if you have a baby.


Modern people who live in metropolis suffers from a lot of stress in his daily life, both because of his compulsive job and the problems he/she has to deal with. Also, since the bond between nature and modern people is getting weaker and weaker, resulting from urbanization, they cannot utilize the calming and healing power of nature. It is where “Essential Oil Diffuser” comes in. In your home and office, it allows you to benefit from the healthy plants in nature. These diffusers help you to move away mentally from daily issues when you close your eyes and just breathe. This relaxation points happier family and a healthier home.


People who don’t want to take chemical drugs when they are ill should give a chance to “essential oil diffusers” It helps to improve the immune system against colds, which is vital in the autumn-winter period. They help eliminate the leading cause of cough by targeting the viruses, bacteria, and toxins responsible for the mucus increase that causes coughing. Apart from that, they alleviate the cough by reducing the density of the mucus and relaxing the muscles. Moreover, it has a preventive feature for aging, thanks to antioxidants in essential oils.

If you have a severe health problem or are taking medication,you should talk to your doctor about using essential oils.


Candle diffusers

The candle heats essential oils and enables them to vaporize. These diffusers are good one for who only wants their room to smell fine and looking for a cheap option. It is not enough to get the advantage of the therapeutic features of essential oils.

Ultrasonic diffusers

It creates ultrasonic waves with electric power, separates their molecules of essential oil and water, then releases them into the air as mist. Due to it is being used with the water, it humidifies the air. Only a little part of the created mist is the essential oil. So, it can take a long time to get medical benefits.

Reed diffusers

Wood sticks are put in something like a bowl filled with essential oil, and the oil is needed to wait for transformation from liquid to gas. (Vaporization happens in every degree.)

Nebulizing diffusers

It has a glass chamber. Essential oil drops here, and air high pressured is through oil and makes oil separated into its small particles called mist. It is possible to make aromatherapy due to mist released from the device being completely essential oil.


In the United Kingdom Center of Cancer, crucial improvement has been seen in the HADS scale (Hospital Anxiety and Depression Scale) of 58 cancer patients who completed six aromatherapy sessions.


To begin with, candle diffusers and reed diffusers are not proper for large spaces, but they can be the best for small rooms. If you plan to buy an Essential Oil Diffuser for large rooms, there are some features which you should care about

Firstly, let’s begin with the most important one: the amount of tanks or reservoirs. Due to it will be for large rooms, there will be more air to fill with essential oil mist, so it requires more essential oil and water (water for just Ultrasonic Diffusers). If the amount of the diffuser’s tank is small, there can be a need to refill its tank often. It means more time lost and work to do.

The ones under the 500ml are for bedrooms and small offices. The diffuser you buy should have a minimum 500-milliliter reservoir. A 500-milliliter Diffuser has a work time of approximately 12-13 hours in low mode, 6-7 hours last in high mode. As the tank capacity increases, the working time will increase accordingly.

  • 500 Ml Diffusor – 10 Hours
  • 700 Ml Diffusor – 18 Hours
  • 1000 Ml Diffusor – 24 Hours
  • 2000 Ml Diffusor – 40 Hours

(These values are approximate. It may vary depending on the brand and model you bought.)


Silent working is one of the essential requirements for Diffusers. While you buy the product, you must see the decibel level is written in the “Properties of Product.” To help you, you can find the decibel levels for some events here:

  • Leaves Sound: 10 dB
  • Whisper sound: 30 dB
  • Normal Speaking sound: 60 Db

Nebulizing or Ultrasonic?

The critical difference between a nebulizing diffuser and an ultrasonic diffuser is whether it works with water. Whereas ultrasonic ones work with water, nebulizing ones do not. As a result, nebulizing ones spread the smell to a larger area because the mist they released is very intense.

Ultrasonic Diffuser

  • Need water tank, it leads their size to grow
  • More economical owing to working with the water
  • Plastic material incompatible with healthy life
  • Humidifies the environment
  • Not the best option for aromatherapy

Nebulizing Diffuser

  • Has a small glass reservoir
  • Expensive due to only working with the oil.
  • Healthier due to glass reservoir
  • Does not humidifies
  • More suitable for aromatherapy


Once you get the best Diffuser for yourself, you may be wondering where to put it.

It is possible for placing to floor or table, but it is suggested that the diffuser should be located to the 1-1.50 meter up from the bottom for the best result.

Do not leave your diffuser under sunlight. Damp and hot locations are best for algae and bacteria. 

Place the diffuser on a waterproof floor because water droplets emerging from mist output can harm the floor, or while you refill the tank, there may be an accident.

If you keep pets in your home, it is recommended that you consult a veterinarian before using oils. The effect of essential oil on animals may vary depending on which oil you use.


Aromatherapy is using essential oils for physical or mental health. Since the rate of the essence in essential aromatherapy oils is very high, it should be diluted with fixed oils and should not be contacted with the skin directly.


According to research, rat inhaling rose essential oil arrived to target point in the labyrinth in less time compared with the others.

Lavender oil

Lavender Oil is the most popular oil in aromatherapy.  It has a beautiful scent and soothing and calming properties.  This oil is the best if you look for better sleep    

Peppermint oil

The most prominent feature of Peppermint Oil is very stimulant. The scent of the oil increases your concentration level and efficiency. Also, it is an excellent choice to handle coughing and respiratory diseases.

Eucalyptus oil

It is one of the most effective oils in relaxing the respiratory tract and breathing thanks to its eucalyptol content. It supports the defeat of infections in the respiratory and excretory tract.

Orange flower oil

It is known that Orange flower oil is in many perfumes, and it is suitable for hypertension disease. It has an impact that is soothing, restful, and refreshing on the spirit.

Some Oil Mix Ideas for You

To get rid of insomnia: Sandalwood, Chamomile, and Petitgrain
To improve concentration: Pine, Frankincense, Spruce, Orange
To cope with stress: Sandalwood, ylang-ylang, Lavender
To boost your mood: Pine, Ginger Fir, Mint
To be relaxed: Sandalwood, Lavender, Petitgrain, Marjoram


Sweetgum essential oil is known as Cleopatra’s beauty potion, and it has been used for mummification in Ancient Egypt.

#1 Best Tank & Silence: Everlasting Comfort Humidifier

If you consider buying an essential oil diffuser for a large space or your old essential oil diffuser comes up short to satisfy you, “Everlasting Comfort 6 Liter Ultrasonic Essential Oil Diffuser” is for you. Compared to other diffusers, it saves you from the trouble of refilling the water tank continually thanks to its vast 6-liter tank. You can easily see the mist released due to its strong mist output. You can understand when you refill the tank in virtue of the water level window on the right side of the water tank. Essential Oil Tray separates it from the others. Whereas essential oil is put into water in many models, in this model, you put the essential oil on an essential oil tray, which provides more safety. With the settable flux, the more you want to release, the more mist. However, it has no timer, and it is essential to note that the larger tank will be heavier and more challenging to move. To mention the appearance, it has meandering lines which make it look modern, and it has two color options as white and black. This diffuser seems the best for every place.

What We Like:

  • High mist output ( 270ml per hour)
  • Filterless design: no costs for replacing the filter regularly
  • Does have an “Essential Oil Tray”
  • Pretty quiet
  • Adjustable flow
  • Auto shut-off: it turns off when the water runs out

What We Don’t Like:

  • More massive due to its tank,
  • Does not have a timer
  • The sound of water passing from the reservoir to the device is heard occasionally

#2 Best Design & Atmosphere: BZseed Essential Oil Diffuser

Bzseed Ultrasonic Essential Oil Diffuser is not only a diffuser. Its excellent wood looking, curvy design and on-off led lights with eight different color turn it to a decorative household item.  When you put this diffuser to your living room or your office, you will see the atmosphere of the environment is changed. Besides its design, that it has weak and strong mist modes that allow you to determine the mist releasing level according to the current conditions. If you plan to sleep with this diffuser, you don’t need to worry because it has an auto shut-off, which means it turns off when the water runs out, and its 500-milliliter water tank does last a night.

Nevertheless, it is sensitive, which means it should be used carefully and may not last very long. That customer service works very well and fast can make you get rid of concerns about this situation. If you look for decorative ones and the long-lasting is not very important for you, you should choose Bzseed Ultrasonic Essential Oil Diffuser.

What We Like:

  • Eight different led lights ON/OFF
  • Timer set in 1/3/6 Hour
  • Weak and robust mist modes
  • Easy to use and easy to clean
  • Customer service
  • Auto shut-off

What We Don’t Like:

  • Some complaints that the max fill line is hard to see
  • The beep sound when it turns off
  • Weak mist release
  • Not long-lasting

#3 Best Mist & Aromatherapy: Aromis Aromatherapy Diffuser

Are you interested in aromatherapy?  Do you want to enhance your aromatherapy sessions compared to the sessions doing with the Ultrasonic Diffusers? It would help if you considered Aromis Nebulizing Essential Oil Diffuser.  It has no water tank, so it is smaller than the ultrasonic ones. This diffuser works with only essential oil, which means its vapor released is denser and denser, and more intense mist can diffuse more area.  It enables you to make use of the benefits of essential oils entirely. It has a glass reservoir which is healthier than plastic ones. However, due to it works with only essential oil, oils you have can be used up quicker, and the glass reservoir is breakable, which means more costs. Also, nebulizing ones are more expensive than the ultrasonic ones. If fees are no problem for you and you want to do aromatherapy best, this product can help you.

What We Like:

  • High intense mist
  • Decorative
  • Suitable for aromatherapy
  • Auto shut-off

What We Don’t Like:

  • Noise above low setting
  • Breakable and explosive glass reservoir
  • More costs due to faster consuming the oil
  • High price compared with ultrasonic ones
  • Hard to clean

#4 Best Price, Portability & Light: InnoGear Essential Oil Diffuser

It is the best option for who says don’t want to run before learning walking. Innogear Ultrasonic Essential Oil Diffuser can be your first step to the Aromatherapy world. That it is small and compact provides effortless cleaning and use, but it leads it not to be a good option for large rooms at the same time. Also, you can use it as a night lamp in virtue of seven different led lights. Compared to the others, it can have low-quality material, and it seems not long-lasting. But, that it is so cheap can make you forget its opposing sides. If you never had Essential Oil Diffuser and want to try it and you don’t want to pay too much money at the beginning, Give Innogear Ultrasonic Essential Oil Diffuser a chance.

What We Like:

  • Small and lightweight
  • High-level light
  • Cheap
  • Easy to use and clean

What We Don’t Like:

  • Poor quality material
  • Leaking problems
  • No long-lasting
  • Low-level water tank

#5 Best Usefulness: Exqline Essential Oil Diffuser

Exqline 1500 Milliliter Essential Oil Diffuser is the best option for those who want their diffuser, neither small nor big. 1.5 Liter tank does not require refilling continually and will not be the problem when you want to move it somewhere. It can boost the quality of your ambiance, thanks to its on-off led light with seven different colors. Considering customer comments, you must be very delicate while cleaning this diffuser. It is sensitive so that you can damage it with a wrong move. And there are some leaking complaints about this product. If you plan to buy, we suggest ensuring that you have a waterproof surface to put it. Except this, Exqline 1500 Milliliter Essential Oil Diffuser will gratify you.

What We Like:

  • 1.5 Liter water tank
  • Adjustable Flow
  • Seven different color led lights

What We Don’t Like:

  • Leaking problems
  • Not long-lasting
  • Does not have an auto-shutoff


  1. A home should have more than 1 diffuser in it. At least one for each room. This article should be helpful shopping for a bigger one.

  2. I would be lost without my essential oil diffuser. I get so many compliments on not only how pretty it looks but also how good it smells.


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