Most essential oil diffusers use water to work, so it makes sense that using a humidifier to diffuse essential oils will give you the benefit of both products — a diffuser for aromatherapy and a humidifier to keep your air at a health humidity level. And since humidifiers are made to cover larger spaces than diffusers, you get the added benefit of aromatherapy for an entire room, not just a small area around the diffuser. Humidifiers also hold more water than diffusers so the