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Essential oil diffusers are a simple way to add fragrance to a room and create a pleasant atmosphere at home. There are several types of diffusers available, with ultrasonic models being one of the most common options.
Different diffuser styles work in different ways, so choosing the right one depends on the space, the type of fragrance experience desired, and how much maintenance is preferred.
Keep reading to learn how diffusers work, how to use an ultrasonic diffuser, and how the different types compare.
What does a Diffuser Do?
Essential oil diffusers use different methods, including water, airflow, heat, evaporation, nebulization, and ultrasonic vibrations to disperse fragrance into the surrounding air.
Some diffusers use water, while others work without it. The resulting scent can vary depending on the type of diffuser, the essential oil used, the amount of oil added, and the size of the room.
Diffusers can be used simply to add fragrance to a living space and can also be incorporated into relaxing routines such as reading, meditation, or winding down in the evening.
How Does an Ultrasonic Diffuser Work?
Ultrasonic diffusers use water and high-frequency vibrations to disperse a mixture of water and essential oil as a fine mist.
Inside the diffuser is a small water reservoir with a vibrating plate. When the diffuser is switched on, the vibrations break the water and oil mixture into very fine droplets.
The resulting mist is released through an opening in the diffuser and disperses into the surrounding air.
From the outside, the process usually appears as a steady stream of fine mist rising from the diffuser.
What are the Advantages of Ultrasonic Diffusers?
- Ultrasonic diffusers use water and vibrations rather than a flame to disperse fragrance.
- Many models are compact and easy to use.
- The amount of fragrance can generally be adjusted by changing the amount of essential oil used.
- Because the reservoir contains water, these diffusers can also add a small amount of moisture to the surrounding air.
- Many models offer timers or intermittent settings, making it possible to control how long the diffuser operates.
- They can be cleaned and reused rather than discarded after a single use.
What are the Disadvantages of Ultrasonic Diffusers?
The main drawback of an ultrasonic diffuser is that the water reservoir needs to be filled regularly. The unit also needs routine cleaning to prevent oil residue and buildup.
Because ultrasonic diffusers contain water, they should be placed on a stable, water-resistant surface where accidental spills are unlikely to cause damage.
How to Use an Ultrasonic Diffuser: A Step-by-Step Guide
Step 1. Choose The Position
Choose a flat, stable location for the diffuser, preferably away from the edge of a table or shelf.
Keep the diffuser away from electronics, books, fabrics, and other items that could be damaged by moisture. It should also be positioned somewhere with easy access to a suitable power outlet.
Make sure the power cord isn’t stretched across a walkway or positioned where it could create a tripping hazard.
Step 2. Fill The Water Reservoir
Fill the reservoir with water according to the manufacturer’s instructions. Some models are designed for tap water, while others may recommend filtered or distilled water.
Check the fill line inside the reservoir and avoid exceeding the recommended maximum level.
The amount of water can affect how long the diffuser runs, so follow the manufacturer’s instructions rather than filling the reservoir beyond its recommended capacity.
Step 3. Add a few Drops of Essential Oil to the Water
Add essential oil according to the diffuser manufacturer’s instructions.
A few drops can provide a lighter fragrance, while adding more will generally produce a stronger scent. It is best to start with a small amount and adjust the quantity during future uses.
Different oils and blends can vary considerably in strength, so there is no universal number of drops that works for every diffuser or room.
Step 4. Place the Lid on the Diffuser
Replace the diffuser lid securely before switching the unit on.
Make sure the lid and reservoir are positioned correctly according to the manufacturer’s instructions so that the mist can disperse properly.
Step 5. Switch on the Power
Now you are ready to switch the power on at the plug socket and then press the power button on the unit itself.
The diffuser will begin to work immediately, although the ultrasonic vibrations are so tiny that you will not notice them. The mist will start to rise after a few moments, and then you can sit back and relax.
Step 6. Switch Off and Empty your Diffuser
Once you are finished, you should switch your diffuser off, first on the unit itself and then at the main outlet. Pour any remaining water that is still in the reservoir down the sink.
Step 7. Clean your Diffuser
It is an excellent idea to clean your diffuser gently after use as this will prevent the metal plate from becoming dirty and damaged and remove any residual oil for future use.
To clean your diffuser, gently wipe the interior of the basin with a damp tissue or cloth and brush the metal plate with a soft cleaning brush to remove residue. Leave the diffuser to air dry.
What Essential Oils are Best?
There is a wide variety of excellent essential oils available today, and each of them can be used for different purposes. When deciding which essential oils to use in your home diffuser, you can look at what effect you are hoping to achieve and your personal scent preferences. Some popular essential oils for diffusing are:
- Lavender: floral, soft, and herbaceous
- Peppermint: cool, fresh, and minty
- Lemon: bright, citrusy, and fresh
- Frankincense: warm, woody, and resinous
- Grapefruit: fresh, tart, and citrusy
- Eucalyptus: fresh, crisp, and camphor-like
- Sweet orange: sweet, fruity, and citrusy
What is the Difference Between a Diffuser and an Air Freshener?
Essential oil diffusers are a natural way to freshen your space while also experiencing some of the benefits of aromatherapy.
Standard store-bought air fresheners contain various chemicals and are scented with artificial fragrance. So not only are you breathing in potentially unsafe chemicals, but you miss out on the aromatherapy benefits.
You only receive aromatherapy benefits when you use pure essential oils, and you won’t find that in any store-bought air freshener sprays or plug-ins.
Of course, essential oils do not only smell better than artificial fragrances but are also far better for your physical and mental well-being.
You also have more control over the amount of scent distributed with an essential oil diffuser since you get to decide how much oil you put in.
Sometimes standard air fresheners can be pretty strong, and lots of people that are sensitive to smells may find them off-putting. I know since I started using essential oils more than 15 years ago, I find my nose doesn’t respond kindly to artificial fragrances!
Sure, you’re less likely to find a summer breeze, fresh linen, or sweet strawberry scent in an essential oil, but there are plenty of fabulous scents and blends available to enjoy.
Why buy an essential oil diffuser?
There are many ways to enjoy the smell of essential oils. You can add droplets to your bath, put a few droplets on your pillow at night, have a few droplets on a handkerchief in your pocket, and even add some to a bowl of hot, steaming water and cover your head with a towel to do an inhalation.
Did you know that none of these methods diffuse the essential oils? To diffuse the oils means to break them into tiny particles that can be carried into the air.
Diffusers actually encourage tiny particles of the oils to be carried out into the air so you are not simply smelling the oils but actively inhaling them.
Ultrasonic diffusers can be plugged in and used anywhere that there is a power socket, and they can be refilled and reused time and time again, so they do not run out like other home fragrancing options.
Candles and diffuser sticks have a far shorter shelf life than ultrasonic diffusers. In addition, candles are often scented with artificial fragrances.
Ultrasonic diffusers are small enough to fit in a travel case and take with you wherever you may go, and they are low maintenance and easy to clean.
They continue to diffuse until they run out of water or are switched off, so you can fill your home with essential oils for as long or as short a time as you wish.
They are also incredibly versatile because one diffuser can be used with any essential oil. You can even create your own unique, essential oil blends if you feel inventive.
What Type of Diffuser is Best?
There are several different styles of diffuser to choose from, and they all work in slightly different ways. We’ve already covered my favorite type of diffuser, the ultrasonic diffuser. The best kind of diffuser for you may be different, so let’s go over the other choices.
The types of diffusers include:
Nebulizer diffusers
- Nebulizer diffusers use a concentrated pressurized air stream to diffuse essential oils into the atmosphere. The effect can be potent, so these diffusers should be used for no longer than an hour at a time. These are the top choice for serious aromatherapy enthusiasts who are willing to spend a little extra to get a more concentrated and powerful release of essential oils.
- An advantage of this diffuser style is that no heat or water is required, making the units less messy and very safe. The specially designed nozzle and chamber for nebulizer diffusers are made from glass, making these diffusers better for the environment.
- The downside to nebulizer diffusers is that they use up a more significant amount of oil with each use and therefore cost more to run. The concentration of scent is also hard to adjust because the oils are not diluted
- Nebulizers tend to be a little noisier than other diffusers, and they do not add humidity to the air, as there is no water element involved. If you live in a humid environment, this could be a good thing; however, if you like to add mist and moisture to the air, then a nebulizer diffuser isn’t for you.
Passive diffusers
- Passive diffusers use materials such as reeds, ceramic, wood, or porous stones to release fragrance gradually into the surrounding air.
- They don’t require electricity, water, or a motor, making them simple to set up and use.
- Passive diffusers generally produce a more subtle fragrance than active diffuser styles and can work particularly well in smaller spaces.
- A reed diffuser is one common example. Fragrance oil is absorbed by the reeds and gradually released into the surrounding air.
Heat-driven diffusers
- Some use an electric heating element, while traditional versions may use a candle or other heat source.
- These diffusers can be simple and decorative, but models that use an open flame require additional care. Keep them away from flammable materials and out of reach of children and pets.
Fan Diffusers
- Fan diffusers use airflow to disperse essential oil from an absorbent pad or similar material.
- They don’t require water and can be switched on and off as needed. The amount of fragrance can generally be adjusted by adding more or less oil to the diffuser’s designated pad.
- One potential drawback is the sound produced by the fan, which may be noticeable in particularly quiet spaces.
A Few Essential Oil Diffuser Safety Tips
Essential oils are highly concentrated, so using them carefully is important.
- Always follow the instructions provided with the diffuser.
- Use only the type and amount of oil recommended for your particular diffuser.
- Keep essential oils and diffusers out of reach of children.
- Use extra caution around pets, as some essential oils may be unsuitable for certain animals.
- Avoid getting essential oils directly in the eyes or on sensitive skin.
- Keep heat-based diffusers and candles away from flammable materials.
- Use a well-ventilated space and stop using the diffuser if the fragrance causes irritation, headache, coughing, or other discomfort.
- Clean the diffuser regularly according to the manufacturer’s instructions.