High Performance HVAC Gas Furnace Information: AFUE Ratings

AFUE Ratings for Gas Furnaces Information

AFUE Ratings for Gas Furnaces

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AFUE or Annual Fuel Utilization Efficiency Heating systems consume approximately 35% to 50% of a typical homes energy budget. Therefore the government has come up with a way to measure efficiencies of furnaces so the can set a standard for minimum efficiencies. The definition of AFUE is: AFUE Annual Fuel Utilization Efficiency. AFUE is a rating that reflects how efficient a gas furnace converts fuel to energy. A gas furnace with an AFUE of 95 means that approximately 95 percent of the fuel is utilized to provide warmth to your home, while the remaining 10 percent flows up the flue and into the atmosphere. Therefore you are actually using 95% of the fuel you are paying for and the other 5% is being wasted up the flue vent.

A gas furnace with an AFUE (Annual Fuel Utilization Efficiency) of 95% is on of the highest efficiency gas furnaces you buy on the market today. Modern gas furnace engineers cannot build a furnace that gets any high efficiency simply because of the properties of natural gas and LP gas used for the fuel in high efficient high AFUE gas furnaces. The next time you go shopping for a gas furnace make sure you take a look at AFUE ratings because this will affect the amount you pay for the fuel whether it is natural gas or whether it is LP gas. The higher the AFUE rating the lower your bill for fuel will be thereby saving you money in the long term if you choose a higher efficient gas furnace over a lower efficient gas furnace.

The rising prices of fuels gives people incentives to pay higher initial cost and installation cost for the high AFUE equipment. A higher AFUE furnace will pay for itself faster over the long term because it uses less fuel to produce the same amount of heat a lower AFUE furnace produces. Other considerations for purchasing the higher AFUE rated gas furnaces is that some utilities and government agencies will give you a rebate or lower rate for gas if you purchase higher AFUE rated equipment.

If you have an older gas furnace (pre-1992) then it is very possible it is less than 80% AFUE. If it is 80% AFUE then 20% of the money you pay for gas to fire the low AFUE rated furnace is going up the furnace flue. Upgrade to a higher AFUE rated furnace and see your bills decrease for gas.

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