In general, most HVAC systems will last 15 to 25 years, but depending on the type of system and other contributing factors, that estimate can be highly variable. Even with HVAC maintenance and regular repairs, eventually, even the best boilers, furnaces, heat pumps, and air conditioners today will run their course.

For heating your home, the most energy efficient HVAC systems currently available are heat pumps (both geothermal and air source) and furnaces. Heat pumps are also a very efficient way to cool your home. For the summer, your most efficient cooling system will be either a heat pump or an air conditioner.

Two-stage furnaces use less fuel and power, reducing operating costs over time. They also provide more consistent temperatures throughout your home without wasting energy or overworking your HVAC system.