An oil furnace is a type of heating system that uses oil as its fuel source to warm up a home. When the oil is burned, it creates heat, which is then distributed throughout the house via ducts or radiators. This system is popular in areas where natural gas is not readily available, providing a reliable way to keep homes warm during cold months. To operate an oil furnace, homeowners need to have a storage tank for the oil, which is usually located outside or in the basement. Regular maintenance is important to ensure efficiency and safety, including cleaning the furnace and checking the oil tank levels.