A GAS FURNACE THAT NEARS PERFECT COMBUSTION New gas furnace which provides heat by extracting over 94 percent of the heat in gas, far outperforms the old 60 percent furnaces in most homes.
AFUE is the standard measurement of efficiency for gas and oil-fired furnaces. Given in percentages, this number tells you how much of your fuel is used to heat your home and how much fuel is wasted. The higher the AFUE rating, the greater the efficiency. Denmark offers a full line of furnaces with AFUE ratings ranging from the minimum industry requirement of 78% to more than 96%.
Cost Savings: If you have an older furnace (with an AFUE of approximately 60%), you could save up to 40% on your heating bills by replacing it with a new high efficiency furnace! The cost to replace your old, inefficient furnace is paid back through lower utility bills.