| ![](/web/20061103103414im_/http://www.oee.nrcan.gc.ca/images2/spacer.gif) |
Energy Efficiency Ratings
Gas Furnaces
![](/web/20061103103414im_/http://www.oee.nrcan.gc.ca/energystar/english/gif/library/blue-line.gif)
|
|
A furnace's energy efficiency performance over a heating season is called the Annual Fuel Utilization Efficiency (AFUE). This AFUE is expressed as a percentage. The higher the percentage, the more efficient the furnace.
ENERGY STAR qualified furnaces have an AFUE of 90 percent or more. To improve electrical efficiency, choose one with a high-efficiency circulating fan motor.
Many factors affect your home-heating needs, so have a heating-load calculation performed to properly size your furnace (heating capacity). Legend |
|