What is the most energy efficient HVAC system? The most energy efficient HVAC system is likely the ductless mini split heat pump. Another answer would be: the system with the highest efficiency rating. But unfortunately, there is no simple answer to this question because every home is unique.

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.

Goodman Manufacturing is an American company operating as an independent subsidiary of Daikin Group, the world's largest manufacturer of heating, ventilation and air conditioning products and systems.