Bryant’s Evolution series high efficiency gas furnace incorporates the highest available efficiency (97 to 98%) with the finest in home comfort. The multistage operation minimizes furnace and air movement noise, generates more even temperatures throughout the home, reduces temperature swings between heating cycles, provides cleaner indoor air, and has fewer on/offs to help preserve the life of the unit. In addition, this furnace has a variable speed fan which is more electrically efficient versus standard fan motors. And this model has more feature rich software on the circuit board so that if you pair it with the Bryant Evolution series thermostat, you will have features you would otherwise not have, such as system diagnostic display on the thermostat (this will alert you of any problems with the furnace), continuous fan speed control (low, medium, and high), WiFi, and so on. If you are interested in having the best technology found in a gas furnace today, this is the model of choice.