To find relief from asthma, allergies and other lung irritants, a home air purifier is a great place to start. Air purifiers help you to achieve clean, fresh, and healthy air in the home and office. An air purifier is an appliance that literally changes the air in the room, some up to six times per hour or more. The way it works is by continuously running air through a series of filters, and releasing only clean, fresh air while trapping harmful irritants. These air purifiers come in a variety of sizes, models, prices, and other features. Generally, they are lightweight and easy to move around. Some can sit on a desktop or dresser, while others roll on wheels. At work and at home, a portable air purifier is very helpful. This ensures that you will take the filter with you from room to room, so that no matter where you are working, doing chores, or simply relaxing, you are doing so in the best possible breathing conditions. Choose from rolling air purifiers on sturdy casters, and lightweight table top units that can easily be carried.