Air purifier

Does anyone use an air purifier in their nursery? I live in a suburb of an extremely busy city, near one of the busiest international airports on the West Coast, so I'm always concerned about pollution. My husband also has seasonal allergies, so it's possible our baby will too. Does anyone have one that they recommend? I prefer a HEPA filter with a UV-C air sanitizer to kill germs. I also don't want one that has a ton of lights on it (I prefer it to be dark for sleeping) and one that isn't too big. Any recommendations would be greatly appreciated!