Why Should I Clean My Air Ducts? Efficiency Clean air ducts allow the air to flow through much easier and more readily, so your furnace, air conditioner or heat pump won?t have to work as hard to ventilate the house. This makes for more efficient operation and lower energy consumption. Performance When your HVAC system does not have to work as hard to push air through the ductwork, it will perform better. Your home will be more comfortable and better ventilated. Longevity Because your HVAC system is operating more efficiently, it will be able to perform at a high level for a longer period of time. Well-maintained systems last longer than those that are not taken care of, and cleaning the ducts is part of good HVAC maintenance.