In the land of air purifier filters, the HEPA filter is the king. This particular air purifier filter removes the most pollutants with up to 99.97% removed. This means that your air is much cleaner than ever before simply by using a good quality air purifier filter. HEPA air purifier filters are also capable of removing cigarette smoke, which helps remove the odors that many non-smokers dislike. When you are looking to purchase an air purifier filter, you need to look for a store where you can purchase the correct size for the particular air purifier you have. This means you may not find the air purifier filter that fits your needs perfectly at the first store you go. You may need to look around at several stores in order to locate your particular air purifier filter.