Furnace cleaning and duct cleaning involve only the individual components of the furnace itself—like the heat exchanger, the blower motor, the combustion chamber, burners, the fan, etc. These are typically cleaned with high-pressure air and an industrial vacuum. Furnace cleaning, air duct cleaning, and HVAC system maintenance are important to keep your furnace running efficiently. If you don’t have your furnace cleaned and inspected annually, the performance of your heating system will suffer. And because it takes time to notice these problems, they can lead to more expensive repairs down the road.