The cost of furnace cleaning in San Francisco mainly depends on the kind of furnace that you have and the amount of cleaning that it needs. You may also add to the cost the labor needed. There are 3 major types of furnaces used in many homes today. These three include the gas furnace, the wood furnace, and the oil furnace. San Francisco furnace cleaning takes effort and enough knowledge. Most homeowners usually clean their furnace on their own. This can be a good initiative to save costs. However, furnace cleaning in San Francisco has to be meticulously made. You may need to remove parts to get into areas of your furnace that have dirt build up. If you do not have the knowledge and tools to do the cleaning, you should hire a professional for the job.