Furnaces typically last for about 15 to 20 years. Elements that can affect your furnace’s lifespan include the environment in which you live, maintenance, and grade of your equipment. Having the proper maintenance done professionally by Action Air Conditioning & Heating every year will make the biggest impact on how long your furnace lasts. Lastly, when purchasing a furnace, it will end up saving you money in the long run to buy a higher-grade system. They handle better, last longer, and are usually more energy efficient which means you will save money on your monthly bills.