High-efficiency furnaces typically have an Annual Fuel Utilization Efficiency (AFUE) rating of 90% or higher. They often include advanced features such as variable-speed blowers, two-stage heating, and sealed combustion.
High-efficiency furnaces typically have an Annual Fuel Utilization Efficiency (AFUE) rating of 90% or higher. They often include advanced features such as variable-speed blowers, two-stage heating, and sealed combustion.