· Getting a cleaner that removes the particles most likely to be in your home, that is, get a filter that removes pollens and animal dander if allergies are your problem. A cleaner that removes cigarette smoke will not help with these pollutants. Therefore, if your need is to kill bacteria then an ultraviolet air cleaner is your choice; if removing particles is what you are after, then consider a HEPA filter system.

· Make sure that the cleaner you buy is the right size for the room you want to use it in.

· Understanding noise level is important, especially if the filter is being used in a bedroom or baby's nursery

· Try to find out what the air flow is like; this is the amount of time it takes the device to remove pollutants from a specific area

· With the high cost of energy, it is important to check the energy rating. Check the wattage used as the higher the wattage, the greater your electricity bill will be

· Maintenance and cost of replacing components such as filters, can add up depending on the type of system you buy

· Like with any new purchases, it's good to look at the warranty on your new air cleaner as a good warranty can save you money

There are other factors that should be considered when selecting an air cleaner such as the clean air delivery rating CADR). This is a rating given based on how much clean air the device delivers in a given time. This rating is assigned by the Association of Home Appliance Manufacturers.