The Shark 3 in 1 Air Purifier is the product I didn’t know I needed. The 3 in 1 Air Purifier really works. I love that I can have it just on as an air purifier or have the air purifier on as I use it as a fan or as a heater. I have no problem purifying the air in a large area room with any of the settings. I have noticed a huge difference in my allergy symptoms since I started using the Shark 3 in 1 Air Purifier on a regular basis. This is a product we all need in our homes.