It is also important to examine what you will be using your air purifier for. A elephantine number of individuals use air purifiers if they have pets or if they have a smoker inside the house. Unfortunately, not the totality of air purifiers are designed to remove these types of particles from the air. Therefore, if you plan on using an air purifier for smoke or for pets to be dust mites free, you are advised to conscientiously read the descriptions of each air purifier that you are interested in buying. Buying the wrong type of air purifier can turn an otherwise good purchase into one that is definitely not worth the buy.