 Oxy Technology is what they use. O3 Molecules is what they send out. They've got tons, I mean thousands, of five-star reviews. You know that it works, and it works very well. Any smell is going to vanish as it goes after viruses, mold, and odors in the air. You'd have to cover up with sprays and candles and all that stuff. It's going to go out and get that cigarette smoke, the trash can smells, the litter boxes, dirty diapers. They're no match for the thunderstorms.