According to SpaRoom, there are four types of diffusers: Heat Evaporative Nebulizing Ultrasonic The technology used to make a ...

These picks for the best essential oil diffusers include nebulizer models and ultrasonic ones, and you'll find one that's portable, another that can stay on for over two days and another that's ...

There are four different types of essential oil diffusers on the market: ultrasonic, nebulizing, heat, and evaporative.