The answer to 'best furnace' is that the best furnace for your home depends on several factors, including the size of your home, your energy efficiency goals, and your budget. In general, a high-efficiency gas furnace or a heat pump are often considered the best options for most homeowners.
High-efficiency gas furnaces typically have an AFUE (Annual Fuel Utilization Efficiency) rating of 90% or higher, meaning they convert 90% or more of the fuel they use into heat for your home. This can result in significant energy savings and lower utility bills. Heat pumps are also a popular choice, as they can provide both heating and cooling, and are often more energy-efficient than traditional air conditioners.