Are your utility bills going up? Furnaces often lose their efficiency as they get older. Is your furnace breaking down more often, resulting in costly repairs?Are you always adjusting the thermostat to make your home more comfortable? Can the system keep up?
According to HVAC Contractor Kris Conover, The average life of a heating system is 12 to 18 years. “So obviously as you get older things start to break down in your body, the same thing happens with heating and cooling equipment,” Conover says.
So if it is time to think about replacing your furnace, there are some things that you should consider. Remember that bigger is not always better. Your unit should be correctly sized so that it will operate properly and efficiently. And, as your efficiency goes up, so does the cost.
“Every system has an evaluation of how efficient it is,” Conover says. “AFUE is Annual Fuel Utilization Efficiency. So if a furnace is rated on that. So, for instance a 95 percent, or 95 percent AFUE furnace, it's using 95 BTU's per hundred BTU's put in. To put it in another term, if you're spending a dollar on heating, it's providing you 95 cents of output. Very, very efficient…one of the most efficient furnaces you could possibly get would be a 95 percent AFUE."