These are small, portable units that may work for a single room. If you are considering buying a HEPA filter, find out how much air that the filter can clean. Be sure you buy one that is big ...

Our list of the best air purifiers includes options with HEPA or PECO filters ... the room’s air quality, and there’s an auto-mode that monitors the VOC sensor, adjusting the optimal cleaning ...

To select the best air purifiers, we focused on those that use high-efficiency particulate air (HEPA ... room up to 500 square feet, I will aim to put that filter in a 250-square foot room.” The ...