When you buy through our links, Business Insider may earn an affiliate commission. Learn more If you love filling your home with a signature scent, try using one of the best essential oil diffusers to spread consistent and natural fragrance as an alternative to the best candles . These diffusers safely and naturally spread fragrance without an open flame.
A diffuser holds essential oils or fragrance oils and disperses them into the air. There are two main types of diffusers: ultrasonic and nebulizing. Ultrasonic diffusers use evaporating water to carry essential oils into the air, but nebulizing diffusers create an internal vacuum that lifts fragrance into the air, so there are no humidifying effects.
The main difference between the two is that ultrasonic diffusers distribute a more diluted fragrance that lasts longer, and nebulizing diffusers deliver highly concentrated fragrance. To determine the best essential oil diffusers, we tested nine options for ease of use and how well they worked and consulted with Amanda Lattin , dean of aromatherapy at American College of Healthcare Science . The Asakuki 500 mL Premium Essential Oil Diffuser is our top choice, with a large water tank that doesn't need to be constantly refilled, adjustable time and mist settings, and an easy-to-use design.
Alternatively, the Pura 4 Smart Fragrance Diffuser is a plug-in waterless design that uses its own scent vials, with partnerships with popular candle brands that let you control fragrance intens.