Types of Diffusers
There are two main types of essential oil diffusers: ultrasonic and nebulizing. The primary difference is that ultrasonic diffusers use water, and nebulizing diffusers do not.
Ultrasonic diffusers agitate water and essential oils at millions of vibrations per second. This converts the water into a fine mist and converts the oil into micro-particles that are released into the air. The water and essential oil mist is so fine that if you hold your hand over the diffuser, your hand doesn’t get wet.
Nebulizing diffusers pressurize air and draw oils through a special nozzle. This breaks the oils down into minute particles and disperses them into the air. These diffusers don’t use water, but can use an entire bottle of oil quickly if diffuser settings are not correct.
Here are some important pros and cons for each type.
Ultrasonic | Nebulizing | |
Water | Yes | No |
Cost | Less expensive | More expensive |
Light | Often included | No |
Oil Concentration | Lower | Higher |
Cleaning | Occasionally | No |
Sound | Quiet | Louder |

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