The smooth comfort of gas heat with the most advanced technology

For the optimal combination of gas heating and impressive energy efficiency, choose Carrier precision-engineered gas furnaces, from the innovative Infinity™ ICS with precision temperature control to the solid Comfort™ 80. The higher the AFUEAnnual Fuel Utilization Efficiency. A measure of a gas furnace's efficiency in converting fuel to energy. The higher the rating, the more efficient the unit. rating, the more energy efficient—meaning you'll save more money.