The answer to 'which is better gas furnace or electric furnace' is that there are pros and cons to each type, and the 'better' option depends on your specific home and needs. Gas furnaces are generally more energy-efficient and have lower operating costs, but require a gas line connection. Electric furnaces are simpler to install, require less maintenance, and are better for the environment, but have higher energy costs. The best choice for you will depend on factors like your home's size, your local utility rates, and your budget.
Gas furnaces are powered by natural gas or propane and are typically more efficient, with annual fuel utilization efficiency (AFUE) ratings of 80-98%. This means they convert 80-98% of the fuel they use into heat for your home. Electric furnaces, on the other hand, have AFUE ratings of 100% since all the electricity they use is converted to heat. However, electricity is generally more expensive than natural gas, so the operating costs of an electric furnace will be higher in most areas.