Yes, energy-efficient options are available for gas furnace replacement. Look for furnaces with high Annual Fuel Utilization Efficiency (AFUE) ratings, indicating better energy efficiency. Modulating and variable-speed gas furnaces adjust heat output to match the demand, optimizing efficiency. Additionally, consider features like electronic ignition and sealed combustion, reducing energy waste. Upgrading to an energy-efficient gas furnace not only lowers heating costs but also reduces environmental impact by using fuel more effectively, making it a wise choice for both economy and sustainability.