3 Best Essential Oil Diffusers for Large Spaces and Big Rooms

Like most people, I bought my first diffuser because I fell in love with the lovely smell that it emitted as I passed by the local store that sold them. However, I realized after two weeks that the diffuser had little impact on my home’s overall scent and that my room had the same neutral smell it had before.

I thought perhaps I hadn’t been using the diffuser right, but in all honesty, I followed the instructions on the box to the tee. So what was the problem? Well, I did some research online and found that I wasn’t alone. There are many other people out there who’ve experienced the same problem and in most cases, it was because they placed a small sized diffuser in a large room, so the scent was unable to cover the entire area.

Through that research, I now know that small diffusers are for small spaces like the bathroom while larger spaces in the house require a big diffuser whose effects can be felt throughout.  

​Our Top Picks

SpaRoom Theralizer Waterless Micro-Air Essential Oil Nebulizer For Aromatherapy and Large Rooms of...
500ML Essential Oil Diffuser Humidifiers Ultrasonic Aromatherapy Diffusers Cool Mist Whisper-Quiet...
Our Choice
Tenswall Aromatherapy Essential Oil Diffuser, 400ml Ultrasonic Cool Mist Humidifier - Whisper Quiet...
SpaRoom Theralizer Waterless Micro-Air Essential Oil Nebulizer For Aromatherapy and Large Rooms of...
500ML Essential Oil Diffuser Humidifiers Ultrasonic Aromatherapy Diffusers Cool Mist Whisper-Quiet...
Tenswall Aromatherapy Essential Oil Diffuser, 400ml Ultrasonic Cool Mist Humidifier - Whisper Quiet...
SpaRoom Theralizer Waterless Micro-Air Essential Oil Nebulizer For Aromatherapy and Large Rooms of...
SpaRoom Theralizer Waterless Micro-Air Essential Oil Nebulizer For Aromatherapy and Large Rooms of...
500ML Essential Oil Diffuser Humidifiers Ultrasonic Aromatherapy Diffusers Cool Mist Whisper-Quiet...
500ML Essential Oil Diffuser Humidifiers Ultrasonic Aromatherapy Diffusers Cool Mist Whisper-Quiet...
Our Choice
Tenswall Aromatherapy Essential Oil Diffuser, 400ml Ultrasonic Cool Mist Humidifier - Whisper Quiet...
Tenswall Aromatherapy Essential Oil Diffuser, 400ml Ultrasonic Cool Mist Humidifier - Whisper Quiet...

​Diffuser Types

There are currently four different types of diffusers available to choose from:

1. Nebulizing Diffusers

Inside a nebulizing diffuser is a small tube that allows air to travel in order to suck the oil out from the bottom of the device to the top. This process is how the essential oil gets sprayed about and into the room to create that lovely fragrance that we all love.   

It’s important to note however that you’ll probably go through a lot more bottles of essential oil when you have a nebulizing diffuser because it uses a considerable amount of oil with each spray of the scent into the air. However, this is also the reason why this type of diffuser is such a firm favorite among most people because its results are far-reaching and immediate.

Of course, you could always control how much essential oil gets sprayed into the air by setting a timer to make sure the device only sprays for 15 minutes each hour, which is plenty of fragrance to go around and create a pleasant smell in your room for the whole day.

2. Humidifying or Ultrasonic Diffusers

Humidifiers and ultrasonic diffusers work similarly to a nebulizer in that they also spray essential oil into the air. However, the difference is that they produce electronic frequencies that cause the water to bubble up and separate the essential oil into tiny microparticles which then come out as spray.

So, instead of using heat energy to create a vapor, this type of diffuser essentially works through an adiabatic process to completely eliminate the need for heat gain or loss.

However, this also means that most of what gets sprayed into the air by a humidifier is just water, with just a tiny amount of essential oil mixed in. That’s why this type of diffuser is mostly suitable for small spaces or for people that only want a small whiff of the fragrance to be present in the air.

​3. ​Heat Diffusers

As the name implies, heat diffusers vaporize the essential oil and diffuse it at a slightly faster speed than other diffusers.

As a result, a lot of heat diffusers are able to really accentuate the smell of the essential oil in the process, but there’s also the risk of altering the core components of the essential oils as well due to the extreme heat that’s used.

That’s why consumers are given the option of choosing a more gentle heat energy diffuser that uses a small amount of heat to create a pleasant and mild fragrance.

However, due to the evaporation process used by the device, the lighter aspects of the essential oil may evaporate faster than the heavier aspects.   

This means that the lightest aspects of the essential oil are released first, while the heavier aspects are released much later in the process. This obviously alters the therapeutic effects offered by the essential oil, which makes this diffuser less effective than others at providing aromatherapy benefits to the user.

With that being said, heat diffusers are the most convenient option for many people because they run quietly in the background and they’re very cost-effective as well.

​Top Essential Oil Diffusers

Incorporating an essential oil diffuser into your home can help calm the senses after a long day at work, help you sleep better at night, or even lift your spirits when you’re feeling down. In addition to these aromatherapy benefits, the right diffuser will make your home smell very good.

If you’re looking for an essential oil diffuser that ticks all the boxes, check out our reviews of what we believe to be the 5 best options available on the market right now.

1. SpaRoom Theralizer Waterless Micro-Air Essential Oil Nebulizer

The SpaRoom Theralizer is a nebulizing diffuser that’s made from hand-blown glass and a premium wood base. It sprays the essential oil fragrance into the air for two minutes only to turn off the next minute, and so on. Releasing the aroma of the essential oil in these short bursts helps save energy while allowing the device to emit a nice, gentle fragrance.

sparoom essential oil diffuser

The great thing about this diffuser is that it’s designed for large spaces in your home, like the great room, bedrooms, living rooms and other spaces that have dimensions of up to 1,000 square feet.

The SpaRoom Theralizer gives you complete control over how much of the aroma is concentrated before it’s released into the room. It also requires you to switch it on and off manually, while the built-in timer enables you to set it so that it runs for two hours without your control.

In order to get the most out of this diffuser, it’s recommended that you put 10 to 15 drops of essential oil into it every time you want to switch it on and make sure to maintain the glass container in a pristine state to avoid the build-up of bacteria.

Things we liked

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    ​Elegant and discreet design
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    ​Great performance
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    ​Comes with a child-proof protective cover
  • Runs quiet

Things we didn't like

  • ​Doesn’t last long

2. URPOWER 500ML Essential Oil Diffuser Humidifier Ultrasonic Aromatherapy

This beautifully designed humidifier from URPOWER is made with a stunning wood grain design, which has a food-grade plastic tank that’s kind to the environment. Once you fill this baby up to the required 500mL, it can stay on for up to 10 hours, and all without the color-changing LED lights coming off.

URPOWER Essential Oil Diffuser

Since URPOWER is a respected manufacturer of ultrasonic diffusers, it only makes sense that they’d be the ones to create a device that revolves around a whopping 7 different colors. It also gives you the option to set it to one particular color if you prefer, or limit the number of hours that it releases mist for to 1, 3 or 6 hours.

You’ll know that it’s run out of water when it suddenly switches off so you’ll never have to guess whether or not you should re-fill it.

Things we liked

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    ​Produces a powerful and pleasant aroma that covers the whole room
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    ​Great customer service
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    ​Creates a beautiful light show and a relaxing aromatherapy experience
  • ​Easy to use and clean
  • Can alleviate allergies and improve air quality

Things we didn't like

  • ​It makes a motor-running sound when it’s operating  

3. ​​Tenswall 400ml Aromatherapy Essential Oil Diffuser

The Tenswall essential oil diffuser is perfect for aromatherapy applications because it has a 400mL capacity and can operate for up to 15 hours without you having to operate it manually.

It also features a gorgeous design with a wood grain finish that makes it look more like a decorative vase than a diffuser.

Tenswall Aromatherapy Essential Oil Diffuser

The fact that it can illuminate a space with LED lights in 7 different colors means that this device has the ability to affect all of your senses to create a truly immersive aromatherapy experience.

As soon as the water levels get lower than the minimum mark, the Tenswall essential oil diffuser switches off automatically. Plus, there are two mist modes for you to choose from that can either operate for 10 hours straight or intermittently according to your preferences.

You’ll also be glad to know that this device features a timer which you can set to 1, 3 or 6 hours and even on continuous mode.

Things we liked

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    ​Offers a steady release of vapor throughout
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    ​Features convenient controls for ease of use
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    ​Good size reservoir
  • ​Durable
  • Beautiful design

Things we didn't like

  • ​No complaints here

​Conclusion

Applying aromatherapy into your home through essential oil diffusers can bring you innumerable benefits, from giving the space a pleasant aroma to purifying the air, alleviating allergies and it can even improve your sleep! The best part is that there are lots of different diffuser options available out there to suit different preferences and budgets.

Out of all the diffusers that we’ve reviewed above, the Tenswall Aromatherapy Essential Oil Diffuser stands out for a number of reasons.

First of all, it can operate for up to 15 hours continuously although it has a 400 mL holding capacity. It also offers a steady release of vapor, which is accompanied by a gentle LED light that changes between 7 different colors.

Plus it’s beautifully designed so you can pretty much put it anywhere.  

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