If you can’t smell it from across the room, your diffuser is probably too small. You need a large essential oil diffuser instead. But it’s not just about size. Some of the strongest essential oil diffusers are nebulizers. Before we move on, let’s explain the jargon. Here’s how to find the best essential oil diffusers for large rooms.
How to find the right essential oil diffuser for your needs
There are different types of diffusers. Some use heat or evaporative action to scent the air, but we won’t be discussing those today. Instead, we reviewed ultrasonic and nebulizing diffusers for large spaces. Here’s the difference between them.
Ultrasonic diffusers
Ultrasonic diffusers are like humidifiers because they have a water tank. But unlike the typical humidifier, they are specially made to handle essential oils.
They are economical in that they don’t use more than three or four drops of essential oil each time the tank is filled. Plus, they output a fine mist to make room air more humid and more comfortable. This is great news if you live in a dry climate or use air conditioning or heating appliances that dry out the air. On the other hand, it’s not helpful to add more moisture if you already live where it’s humid.
Next, ultrasonic diffusers are very quiet. The only sound you hear is a tiny hiss as the vapor escapes.
Last, ultrasonic diffusers are typically less expensive. Look for one with at least a 400 mL tank to cover a large room. The larger the tank, the longer the diffuser will operate without a refill.
Nebulizing diffusers
A nebulizing diffuser is even better than an ultrasonic model when you have a large space. They atomize pure essential oil, which is why they are called waterless diffusers. Although they go through oil quickly, they spread the aroma farther and faster.
On the downside, nebulizing models are often more expensive than ultrasonic diffusers. They are usually a little noisier, too.
Take a look at the best essential oil diffusers below:
| The best essential oil diffusers for large rooms | Why we love them |
|---|---|
| URPOWER 500ml Essential Oil Diffuser |
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| Smart WiFi Wireless Essential Oil Aromatherapy 400ml Ultrasonic Diffuser & Humidifier by Sierra Modern Home |
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| ASAKUKI 500ml Premium Essential Oil Diffuser |
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| Homeweeks 500ml Essential Oil Diffuser |
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| 1500ml Exqline Diffuser for Essential Oils |
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| DIFFUSER WORLD : Aroma-Ace Essential Oil Atomizing Diffuser |
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| The Magic Scent Atomizing Essential Oil Diffuser |
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Best Essential Oil Diffusers for Large Rooms in 2024
URPOWER 500ml Essential Oil Diffuser
This brand makes some of the best essential oil diffusers with the most economical prices. Each diffuser typically offers multiple benefits including color-changing lights, a timer, and multiple mist modes.
Take this 500mL diffuser, for example. It holds just over a pint of water and can operate up to ten hours on a single tank full. If you forget to check it, it has an auto-shutdown when the water gets low.
Program the timer to run it for sixty minutes, 120 minutes, 180 minutes or nonstop. Reviewers say it can handle a 1000 ft.² room without issues. It just takes a little time for the mist to spread out across the space.
What’s also nice is that the tank is BPA-free PP plastic – the same stuff baby bottles are made of. And if you have any questions about the product, they have 24-hour online support.
Choose from seven different colors of tank, all of which have a nightlight with adjustable brightness. (You can even run the light without running the diffuser).
Pros:
- From a reputable brand that offers a wide variety of ultrasonic diffusers in different designs
- Four timer settings and LED night light with adjustable brightness
- BPA-free plastic available in seven different colors
- Runs up to ten hours on a full tank
Cons:
- None
Smart WiFi Wireless Essential Oil Aromatherapy 400ml Ultrasonic Diffuser & Humidifier by Sierra Modern Home
If you have Google Home or Alexa, you can ask them to turn on this diffuser. It’s voice control-compatible right down to setting the mist intensity, the color of the light, and the timer. All you need is to install an app on your smartphone and ensure it’s connected to the 2.4GHz network (not 5G).
The 400mL tank runs up to twelve hours continuously on the low intensity setting. Reviewers say the cool mist aroma easily fills large rooms, even those with high ceilings. If you don’t want to add essential oil, you can use it as a plain old humidifier.
The package includes a power cable and instructions. The necessary app is available for both Android and iPhone.
Pros:
- Runs up to twelve hours continuously
- Voice control-compatible with Alexa and Google Home
- Smartphone app allows for scheduling, adjusting the timer and color of the light, and mist intensity
- Can also operate as a humidifier without essential oils
Cons:
- Not compatible with 5G networks
ASAKUKI 500ml Premium Essential Oil Diffuser
If you’ve never purchased an essential oil diffuser before, would it make you feel more comfortable to know if it comes with a satisfaction guarantee? This one also has one year of technical support.
It’s an ultrasonic diffuser with a large plastic tank that’s straightforward to clean. It operates up to sixteen hours at a time, but you can choose from different mist modes. The more intense mode fills a large room faster, but it also uses the water more quickly. On the bright side, the tank is eco-friendly PP plastic so you’re not putting toxins from it into the air. And if the water runs out, the diffuser shuts down automatically.
There’s also an LED light with seven different colors. You can let it shift through the spectrum, set it to a single color, or turn it off.
What’s the con? The manufacturer recommends this diffuser for up to 320 ft.² if you want to 50% relative humidity. Therefore, it might be a little small for a large room.
Pros:
- Comes with one year of technical support and a satisfaction guarantee
- Color-changing LED, timer, and adjustable mist intensity
- Tank is made from PP plastic and straightforward to clean
Cons:
- Best for maintaining 50% humidity in a 320 ft.² room so it might not be the best choice for a larger space unless less humidity is desired
Homeweeks 500ml Essential Oil Diffuser
Large tanks like this one are easy to clean because you can fit your hand inside. If you’ve used a humidifier or diffuser before, you already know that you’ll need to wash it every once in a while and perhaps descale it if you have hard water.
If you’ve been peeking at the photos, you’ve already seen that this model, the one above it, and the first one we reviewed all look pretty similar. Not only that, they have comparable features like BPA-free tanks and automatic shutdown when the water gets low. Chances are, they’re all made by the same manufacturer and distributed under different brands. This could potentially save you money.
But take note – this diffuser comes with a remote control. It manages the three timer settings (60, 120, 180 minutes), continuous function mode, and size of the mist. It also handles the LED nightlight with 7 different colors and adjustable brightness.
Pros:
- Remote control manages the timer, light, and mist intensity
- Large tank is BPA-free and easy to clean
- Automatic shutdown when the water gets low
Cons:
- None, as you can still change the settings without the remote control if needed
1500ml Exqline Diffuser for Essential Oils
It has a huge BPA-free tank that holds almost half a gallon of water. It can humidify up to 325 ft.² or do aromatherapy over 450 ft.². At maximum capacity and the lowest mist setting, it runs up to 20 hours straight without a refill. If the water runs out, the diffuser shuts down by itself.
As it operates, it makes less than 35 dB of noise, which is literally whisper-quiet. Turn the knob to adjust the vapor and rotate the nozzle to point the mist in the direction where you wanted. Then, switch to the light between dim or bright. It’s just that easy.
The diffuser comes with a one-year warranty as well as lifetime customer service.
Pros:
- BPA-free tank lasts up to 20 hours without a refill
- Less than 35 dB of sound – whisper-quiet
- Adjustable mist with directional nozzle
- Nightlight with variable brightness
- Comes with a one-year warranty and lifetime customer support
Cons:
- None
DIFFUSER WORLD : Aroma-Ace Essential Oil Atomizing Diffuser
Large rooms are not a problem for this essential oil diffuser rated for 1,000 square feet. In fact, it can handle up to 1500 ft.²! We wouldn’t be surprised if it’s working behind the scenes at your favorite spa.
It’s a nebulizing diffuser that’s surprisingly quiet. Just install the Aroma Sound Reducer part that’s included in the box and you’ll hardly hear it running.
But what’s even more interesting is its ability to atomize particles so small they stay airborne for 75 minutes. Set the timer for intermittent dispersal, and diffuser is actually quite efficient, not using nearly the amount of essential oil that other models might.
No, it’s not the most attractive diffuser. It looks rather therapeutic, though. Plus, you can get it in different colors to match your décor.
Finally, this product is made in the USA and comes with a 5-year warranty.
Pros:
- Rated for 1500 ft.²
- Waterless, won’t make spaces damp
- Nebulizing diffuser with high-tech atomizing abilities to keep essential oil particles suspended for 75 minutes
- Straightforward controls set the timer and intensity
- Made in the USA and includes a 5-year warranty
Cons:
- Although it doesn’t look zen, it does appear to be a therapeutic appliance
The Magic Scent Atomizing Essential Oil Diffuser
What if you could attach a diffuser to your home’s HVAC system? You could enjoy aromatherapy day or night, with heating or air conditioning, and without making the air more humid.
Although the manufacturer offers a variety of different sizes, this one is perfect as a standalone diffuser for a large room or an entire home when connected to HVAC. It uses high-pressure cold-filtered air to atomize the essential oils and preserve their potency. But don’t worry, you can choose the intensity and the length of time you diffuse them. Since it’s so versatile, you can even use it in a smaller room by simply turning down the concentration.
The diffuser is completely programmable and fairly quiet while operating. Moreover, it’s simple to clean and switch the oil bottles. There isn’t a lot of maintenance needed. The only con is that the brand’s replacement oils are a little pricey. You don’t have to use them, but they offer amazing custom scents like Positive Mood, Increased Energy, and Better Breathing.
Pros:
- Standalone nebulizing diffuser that also can attach to a home HVAC system
- Perfect for large or small rooms depending on the intensity chosen
- Completely programmable and easy to maintain
Cons:
- If you choose to use the brand’s replacement oils, they aren’t cheap
Conclusion
When you have a big space, you need the right size diffuser. We hope our reviews helped you find the best essential oil diffuser for a large room today. Feel free to leave us a comment about how it’s working for you.