The 9500 Series are Single Stage High efficient Gas Furnaces with either a multi-speed PSC motor (NSM models), or a ECM X-13 motor (NSX models). All 9500 Series furnaces are 95% AFUE (Annual Fuel Utilization Efficiency). With superior design and engineering these furnaces provide reliable, safe and efficient heat for your home. The 9500 Series furnaces are small in stature but big in performance. With 10 models to choose from there is one perfectly fitted for your home.