In 1983, the average annual fuel utilization efficiency (AFUE) of gas furnaces installed in residential homes in the United States was approximately 65%. This means that for every dollar spent on natural gas, 65 cents was used to heat the home, while the remaining 35 cents was lost to inefficiency.
Today's modern gas furnaces have AFUE ratings of up to 98%, meaning that they are much more efficient at converting natural gas into heat. This can result in significant savings on heating costs over time.
If you are still using a gas furnace that was installed in 1983, it is likely worth considering upgrading to a more efficient model. This can help you save money on your heating bills and reduce your overall environmental impact.
