I have a huge house and this machine keeps it smelling fresh. I keep it next to the kitchen so it takes care of the odors from cooking quickly. When I cook, the air quality goes down, and it quickly comes back up. I like that it's constantly monitoring and automatically works harder to clean the air when needed. The fresh scent it gives out is also a major bonus. My house always smells so fresh and clean, and everyone's allergies are better too.