Will upgrading to a better air filter improve my HVAC system's efficiency? Yes, upgrading to a better air filter will improve your HVAC system's efficiency? Here is how. First, dirt is the biggest enemy of an HVAC systems. Many of these systems are composed of a furnace, an air handler, and condensing unit (the outside unit). A better air filter will keep your HVAC system cleaner. A cleaner system will use less electrical energy and will need fewer repairs, saving you money. Additionally, a better air filter will prolong the life of your system. Other particularly good benefits of upgrading to a better filter are that you and your family will breathe cleaner air and your home will stay cleaner.