What Does 80% and 90% Mean on a Furnace?

There are many choices that you have to make when you are shopping for a new furnace. One of the important ones is efficiency. The numbers you see like 80% and 90% are the efficiency. The 80% furnace is initially cheaper to purchase. The 80% means that 80% of the heat generated by the burnt fuel is used and the other 20% is wasted. It is not as efficient as the other models that have a higher number. The 90% furnace uses 90% of the heat generated and only 10% goes to waste. This is also called a condensing furnace because the gas is passed through a heat exchanger and then forced past radiator/coils and the remaining moisture is cooled, condensed, and released. The 90% is best for the comfort for your home. Both of these furnaces come in single and two stage models. The singles stage burns at 1 fixed rate when the thermostat tells its to turn on and turns off when the thermostat reaches the correct temperature. The two stage burns on heat demand at high or low power depending on the temperature outside. Bartlett Heating and Air has both 80 and 90% single and two stage furnaces to meet your needs. Call today to find the perfect furnace for you!