When looking for a good air purifier system for your needs you can must spend a few dollars to get a better system. The better systems will usually have a quality air purifier filter system. The average cost of a good air purifier system will run in the three to five hundred dollar range. Most of these systems will have quality filter systems on board. Today's air purifier technology is so complex, most consumers do not know a thing about how it works and what to look for in an air purifier. I will explain some of the common terms you probably hear when buying an air purifier and what to look for. What's Best Air Purifier?