It's not uncommon to find your diffuser isn't living up to your expectations to use them in a large room. This is likely because you've found yourself with a model that's too small, therefore unable to provide aromatherapy to every corner of your room. A large diffuser may work better here. Investing in one of the best essential oil diffusers for large rooms can easily fix this problem, and meanwhile — just move that small one into the bathroom, where it'll work even better (and be a pleasant surprise for guests!)
Compared with the small one, an oil diffuser for large spaces can be more suitable for evenly dispersing the fixed aroma in a large space. Also, the large essential oil diffuser provided by the aroma diffuser manufacturer can distribute the oil particles better into the air, which better perform the functions of the essential oil to help people in the room to enjoy themselves.

If your diffuser is too small, you may not be utilizing its full potential. A nebulizing diffuser works without the help of heat or water to atomize essential oils by breaking them up into smaller particles that can be evenly distributed in the air. Ultrasonic diffusers are wildly popular because they act as both a diffuser and humidifier, which means they do require water, but they're also multi-functional which is especially beneficial during cold or allergy season. You'll need to make sure it comes with a tank that's large enough to fill up that big room of yours. So, if your room is relatively large, you'd better have a large oil diffuser for your own use because the oil diffuser for large spaces can work much better.
What Size Diffuser for Large Room?
If you have a large room and you want to diffuse essential oils throughout the space, you will need a diffuser with a larger capacity. As a general rule of thumb, for a large room, you should look for a diffuser with a capacity of at least 500ml.
A diffuser with a capacity of 500ml or more will be able to run for a longer period of time, providing consistent scent coverage throughout the room. Additionally, a larger diffuser can produce more mist, which can help to better distribute the essential oils.
It's also important to consider the type of diffuser you choose. A nebulizing diffuser may be a better option for a larger room since it can cover a larger area and provide a more potent scent. However, a nebulizing diffuser may also use essential oils more quickly than an ultrasonic diffuser, so you will need to refill it more often.
Ultimately, the best size diffuser for a large room will depend on the specific needs of your space and your personal preferences.