The efficiency of a furnace is gauged by its Annual Fuel Utilization Efficiency (AFUE) rating, a key factor in determining its performance. Higher AFUE rating means that the furnace is more efficient. Here are common AFUE ratings:
• AFUE 80
• AFUE 95
• AFUE 96
• AFUE 97
In each AFUE rating, the numerical value represents the percentage of energy effectively transformed into heat for your home. The remaining percentage accounts for losses through chimneys and other ventilation systems. For instance, an AFUE of 90 implies that 90% of the furnace's energy is converted into heat, with 10% being lost. Understanding these ratings helps you choose a furnace that aligns with your efficiency needs.