AFUE: Annual Fuel Usage Efficiency

What is AFUE?

AFUE stands for Annual Fuel Usage Efficiency, and is a means of showing how efficiently a furnace transfers heat from the energy created by burning gas to the area. For every dollar of fuel used by the furnace, this is how much heat is produced to heat your home. Think of it as a a gas mileage, but for your furnace. The higher this number, the more energy-efficient a furnace is, the lower your fuel costs. In Canada, the mandatory minimum for an AFUE rating is 90%, meaning that only 10% of the energy can be lost.

Generally, less efficient furnaces are simply older models which inefficient burners, air leaks or less-advanced design.

So what does this mean?

Well, for example, our top of the line Lennox SLP98 furnaces have a AFUE of 98%, meaning they are among the most energy efficient in their class. This rating is important to consider as almost half the energy used within your home will go to heating and cooling. If you have an older furnace with a lower AFUE rating such as 85%, you will be paying for that extra 15% out of pocket, while experiencing poorer heating capacities.

In order to minimize energy waste, and the resulting extra money spent, it is important to consider products with high energy efficiency ratings. An industry leading residential furnace of the most efficient models can save you hundreds of dollars a year when compared to an older, less-efficient one.

Calculate your savings here:

Lennox’s website offers a handy calculator which allows you to figure out how much money you could potentially save with a furnace replacement.

Find out how much you can save here!

Also remember to keep in mind that the government of Canada offers rebates on many high-efficiency furnace replacements. Take a look at the rebates offered, and start saving on energy today. Please also feel free to contact Cozy World to learn more about our financing options, energy-efficient furnaces, air conditioning units and how you can benefit from a home HVAC upgrade.