Furnace cleaning is the process of removing dust, dirt, soot, and debris from your furnace and its components, such as the blower, fan, heat exchanger, burner, and filter. Your furnace is the device that heats your home or business by burning fuel such as natural gas, oil, or propane. Over time, your furnace can accumulate dirt and pollutants that can affect its operation and performance. You may need furnace cleaning if you notice any of the following signs: