Definitely, it can fill your room with scents efficiently! These units make use of essential oils and these oils are supposedly potent. So, you have to choose your aromatherapy oils carefully. As for me, I use 2 to 4 drops of my favorite essential oil. In just a few minutes, my room is fully scented and I start to feel relaxed. Of course, there are many different kinds of oils but generally, they all have the same chemical composition. With that in mind, it will not take that long to achieve the results you want.