High-efficiency HVAC units are heating, ventilation, and air conditioning systems designed to use less energy while providing effective climate control. These units often feature advanced technology, such as variable-speed motors and smart thermostats, which help optimize energy consumption and maintain comfortable indoor temperatures. By utilizing high-efficiency components, these systems can significantly reduce utility bills and lower greenhouse gas emissions. Many high-efficiency HVAC units are rated with a SEER (Seasonal Energy Efficiency Ratio) or AFUE (Annual Fuel Utilization Efficiency) rating, indicating their energy performance and efficiency compared to standard models.