Changing the filter in your home is one of the least expensive things you can do to maintain your HVAC system. After months of furnace filter neglect serious things can possibly happen. Your furnace may simply break down and you will need to find replacement parts. If your heat exchanger becomes warped or cracked from the heat build up within your furnace, noxious carbon monoxide fumes may leak into your home, not only making you sick but also potentially killing you and your entire family. Can you imagine all of this, simply because you could not be bothered to maintain your furnace filter? Faulty furnaces have also been known to cause fires, all because the furnace filter wasn’t clean, and air couldn’t circulate properly through the furnace and throughout your home. Clean up after a fire is incredibly expensive, and there is no telling what damage you made in the process. You can save yourself a lot of stress, a lot of health problems and a whole lot of financial burden simply by keeping your AC or furnace filters clean.