The air filter’s job is to keep dust and debris out of your HVAC equipment. You’d be amazed how much builds up on there in a very short amount of time. Just think about the air quality in your area and how much grim can accumulate on your floors, countertop and appliances if you didn’t clean the filter for a month… That’s how much debris is clogging your air filter, and mush more if you haven’t remembered to change the AC filter in a while. Don’t know how to change your AC filter? Don’t fret or look anywhere else. Here are 5 simple (and quick) steps to change your AC filter.