 Odors from litter boxes, trash cans, cigarette smoke, dirty diapers, even left-wing protesters. No match for the Edenpure thunderstorm. The powerful thunderstorm sends out O3 molecules that seek out and help destroy odors. These molecules even go behind and underneath furniture. Nothing can hide from the thunderstorm. And best of all, no filters to buy and replace over and over again, saving you money and hassle and scheduling. They're small, too. You can hold one in your hand. They're only this big.