 Because it wipes out odor so well. The Eden Pure Thunderstorm is an air purifier and it's an odor eliminator. You can get three of them for less than $200 and save $200 at EdenPureDeals.com. The discount code is ERIC3. E-R-I-C-K, the number three. There's no space. E-R-I-C-K-3. You go to EdenPureDeals.com. You put in ERIC3. You can run the Eden Pure Thunderstorm off of USB power in your car or plug it into the wall and it works. It is an air purifier. It gets rid of the dust. It gets rid of the pollen.