Here’s why dorm rooms need an air purifier and how to choose the right size. Dorm rooms can trap dust, odors, germs, and even mold spores in a small shared space. To actually filter those particles out, you need a purifier powerful enough to cycle the air in a typical 150–225 sq ft room. If a unit is too small, it simply won’t clean the air often enough which can lead to more dust buildup, aggravated allergies, and lingering illness. Here’s how three popular Levoit sizes compare so you choose th