 Eric, odors can run, but they can't hide, even behind furniture. Nothing can hide from the thunderstorm because it sends out O3 molecules that destroys odors everywhere. I love it. You know, you don't have to buy filters. That saves you money. And right now, we're going to save you even more money. You can save $200 on an EdenPure Thunderstorm 3-pack for whole home protection. You get three units for under $200.