Air Purifiers The quality of your air indoors can make a huge difference in your comfort level in your home. Help contribute to your easy breathing as much as you can with an air purifier. Home air purifiers work to reduce particles in your air, giving you the clean, crisp air your desire. To keep your room air purifier working as best it can, be sure to replace your air purifier filters. As filters get old, more particles are able to get through the filter, thus infiltrating your air. By replacing these filters, your purifier can better keep these particles out of your air and the air clean and fresh. When shopping for a room air purifier, be sure to note the size of the room you are placing it in, as different purifiers have different limits. This will help you choose an air purifier that is perfect for your home.