Best Oil Diffuser for Large Room Coverage




Using essential oils for their health benefits is one of the oldest and still most trusted methods of easing anxious minds and soothing ailing bodies. While essential oils can be consumed or applied to the skin, if you want to access the full potential of their healing properties it’s best to use a diffuser. It’s also a great way to purify and cleanse air, adding a fresh and inviting aroma to your home and workplace.

If you have a large room or office, some smaller diffusers simply won’t emit enough mist to effectively fill the space. I’ve researched the best oil diffuser for large room coverage and compiled a list of my top five picks.

This list was last updated June 20, 2017.

1. URPOWER 500ml Diffuser and Ultrasonic Air Humidifier

URPower 500ml Aromatherapy Essential Oil Diffuser 300pxThis is both a large room essential oil diffuser and a humidifier with the added benefit of an alternating colour night light. The water capacity is a large 500ml allowing up to 10 hours continuous use.  It automatically turns off after choosing from the three time period options, or once the water has run out.

Unlike many other diffusers, the URPOWER interior pops out for easy cleaning and its clearly marked water lines means you’ll avoid an overfill spill. Despite its large capacity and power, the diffuser is amazingly quiet and a great essential oil diffuser for a large room.


2.  Housmile 600ml Essential Oil Diffuser

Housesmile 3rd Version 600ml Diffuser 300pxThe Housmile not only boasts an impressive water capacity and the ability to purify the air for up to 15 hours, but is one of the most stylish of the large room essential oil diffuser products on the market.

The Housmile adds a subtle ambience with its built-in, warm glow light and its wood-grain exterior. It’s also one of the quietest diffusers which makes it the perfect ‘seen but not heard’ addition to the home.

Its stylishness shouldn’t be mistaken for a lack of substance—the Housmile emits an impressive amount of mist, sure to put at ease any lingering coughs, allergies or tension.

3.  Housmile 1.8L Essential Oil Diffuser


Housmile 1.8L Essential Oil DiffuserAnother large diffuser from Housmile that offers a bigger size and design.

At a massive 1.8 liters, this diffuser is perfect for the office or home where you want to set and forget for the day (or night). With such a large capacity, it can run continuously for up to 18 hours in low mist mode.

There are 3 levels of operation that allow the diffuser to run for different times and mist levels, depending on what you need. The higher mist level is great for humidifying and the diffuser still runs up to 8 hours. When the water runs out, the unit automatically shuts off.

You can choose from 7 soft color changing lights to create ambience. At night, sleep mode will keep the diffuser running without the lights.

4.  Serene Tranquility 3000ml Diffuser and Cool Mist Humidifier

Serene Tranquility 3000ml Cool Mist HumidifierHUGE!  This is the biggest diffuser on the market.  At 3 liters, it can last up to 40 hours on the lowest mist setting.  You will never have to worry about it running out while you sleep.

This diffuser is designed to humidify a large area quickly and efficiently.  This means the essential oils can get to work fast for boosting your health and well being.

Filling the tank for this diffuser is easy – just place it under the tap.  The tank is stable and durable eliminating any concern about breakage or spills.  Plus, your essential oils can be added straight in with no need to worry about corrosion.

With 3 colors to choose from, if you are after a HUGE, whisper quiet diffuser that delivers high humidity, then this is perfect.

5.  Apalus 500ml Glass Aromatherapy Essential Oil Diffuser

Apalus 500ml Glass Aromatherapy Essential Oil DiffuserLast but definitely not least is the Apalus 500ml Glass Diffuser featuring an elegant glass design.

Using its sturdy 500ml capacity to diffuse essential oils it will cleanse the air and invigorate the senses for up to an impressive 18 hours. It has a high capacity and has coverage of up to 1000 sq ft.

Choose one of seven colours to suit your mood or décor, or simply let it roll seamlessly through the rainbow as you drift off to sleep.  You can also turn the light off completely if preferred.

Emitting an impressive amount of mist, the Apalus is easy to refill and clean and its sturdy build is spill proof around children and pets.


The best essential oil diffuser for a large room is one that is easy to clean and refill, looks like it’s part of your decor, has sufficient light and time settings to suit your needs, and of course—efficiently diffuses your favourite essential oils and purifies the air. These larger capacity diffusers produce more mist and a wider reach for the diffusion; perfect for large rooms and open plan spaces.

Each of the diffusers I’ve listed is perfect for bringing the valuable therapeutic qualities of essential oils into your home or office. They’ll help you to wake up, relax, recuperate, repel the cold season, and will make anyone who enters the room feel right at home.



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