How do oil diffusers work

How do oil diffusers work

How Do Diffusers Work?

How do oil diffusers work

To cope with stress at home or in the workplace, many individuals choose aromatherapy as a natural solution. 

If that sounds like your preference,  we do recommend you to have a try on AromaEasy essential oils diffuser – a small electronic device that mists essential oil to fill a room or office with its scent.

In a word, the essential oil diffuser works by dispersing essential oils that are easily absorbed by the body.

Additionally,when most essential oils are dispensed through a diffuser,they also emit a pleasant odor into the air, and purify the air by inhibiting bacteria.

Types and Models of Diffusers

There are 4 basic types of diffusers.

  1. Ultrasonic (Ultrasonic Vibration)
  2. Candle (Heat)
  3. Evaporative (Wind/Fan)
  4. Nebulizer (Force/Atomization)

Furthermore, each of these diffusers uses a different process to diffuse essential oils into the air and has its own unique advantages, as well as limitations in some cases.

If you have specific needs, the differences between them can be significant.

Ultrasonic diffuser

An ultrasonic diffuser is similar to a humidifier in the sense that it requires water to operate.

Certainly the ultrasonic diffuser atomizes a mixture of water and essential oils, and then disperses it into the air.

Most ultrasonic models double as humidifiers, which makes them extremely useful in arid climates or dry winter.

Although the working mechanic of these essential oil diffusers is simple, you still need to understand the advantages and disadvantages of their design before purchasing.


  • Ultrasonic diffusers are the most common type on the market today, which means you can find a wide range of capacities on various models
  • Usually cheaper than the nebulizer
  • Usually quieter than nebulizer-perfect for relaxing, sleeping and working
  • Can double-function as a humidifier


  • Need water to run
  • Needs occasional cleaning
  • Citrus essential oils are not recommended for these models because the acids in these essential oils can corrode parts of them gradually.
  • Many models are equipped with lights that cannot be turned off, making them not so ideal in dark areas.
  • Water/oil mist production is less effective than that produced by a nebulizing model

Nebulizing diffuser

The diffuser of this type does not require any water to operate.

Instead, they used atomizers to produce fine particles from the essential oil, which were then diffused into the air by the device.

Because the oil has not been diluted by water, the resulting mist can be very powerful.

Although this may be the most important feature of these models, the nebulizing diffuser has its own disadvantages, which makes it undesirable in some cases.


  • No water required; most models do not require any complex settings
  • Most models include a timer that lets you control the duration of the diffusion
  • Mist is stronger than those produced by other types of diffusers
  • Most models have no or only little lighting, making it a wise choice for overnight diffusion


  • Usually larger than other types of diffusers
  • Uses oil faster than other types of diffusers
  • Generally the most expensive among all types

Evaporative fan diffuser

Evaporative fan diffusers work by evaporating oil.

More precisely, the user dips a few drops of essential oil into an absorbent pad in a diffuser and then evaporates it.

Once this is done, the oil is dispersed by the fan inside the device.

Since some models (including personal diffusers, pendants, bracelets, etc.) are so simple, they don’t even use a fan-they just let the natural airflow of the surrounding environment diffuse the oil.


  • One of the most economical electronics in terms of purchase and operating costs
  • Most models are very portable and perfect for travel
  • Their coverage is relatively small, making them ideal for smaller areas such as office tables or bathrooms


  • Weak output limits the dispensing area and may reduce the therapeutic effectiveness
  • Absorbent pads must be replaced and refilled periodically
  • Most models rely on battery or a USB port for power

Candle diffuser

As the name suggests, This diffuser uses candle’s heat to evaporate essential oils.

Generally, this type of product does not even use electricity, they used candles to heat the oils from below instead.

Although this makes the candle diffuser more economical than other varieties, this affordability is at the expense of lacking oil control over diffusion.

Therefore, they are not suitable for use in any area where open flames are prohibited.


  • The most economical variety of diffusers
  • Can be used even without electricity
  • Easy to clean and maintain


  • Uncontrollable intensity or duration of diffusion
  • Not suitable for office-based environments or where the use of open flames is not allowed
  • Mixed aroma of candles and essential oils reduces the efficiency of aromatherapy


The world of diffusers is enormous, and undoubtedly there will be a diffuser that perfectly suits your needs. 

If you are seeking for a diffuser in your bedroom or office, all you might want is the full range of features of an ultrasound model. 

If you need a powerful diffuser to cover a larger space, a nebulizer may be your best choice.

Those who need a travel or desk diffuser may find the ideal model in the evaporative type.

At the same time, candle diffusers are perfect for those looking for a truly natural aromatherapy treatment.

If you have other questions about the differences between the models, please feel free to contact us

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