We are often concerned about exterior air quality relating to levels of pollen and other particulates. According to the Environmental Protection Agency (EPA), however, pollutant levels can be 100 times higher inside your home than outside. That’s because new homes utilize more airtight construction techniques for greater energy conservation. Plus, most air conditioning units are closed systems: the same air is recirculated without fresh air being introduced. This may result in bad air quality, and we’ll discuss three methods to deal with this below.