The answer to 'types of furnace' is that there are several common types of furnaces used in homes, including gas furnaces, electric furnaces, and oil furnaces. Gas furnaces are the most popular type, as they are generally more energy-efficient and cost-effective to operate than electric or oil furnaces. Electric furnaces are a good option for homes without access to natural gas, while oil furnaces are less common but can be a good choice in areas where natural gas is not available.
Each type of furnace has its own advantages and disadvantages, and the best choice for a homeowner will depend on factors such as the home's size, local fuel costs, and personal preferences. It's important to consult with a qualified HVAC technician to determine the most suitable furnace for your home and needs.