The air in my home became lighter to breathe. I pan fried meat and you could see the air purifier was working to clean the smoke and oils from the air. In what would take a day or two for the odors to disappear only took an hour or so to be completely eliminated from the air! After I vacuumed and dusted before the Alen Purifier, a layer of dust would soon resurface on all my surfaces. But now my home stay virtually dust-free! And most importantly, I don’t experience my daily asthmatic coughs anymore!!!