AFUE ratings are one way to compare the efficiency in furnaces, many years ago, the Federal Trade Commission started to require that all furnaces have AFUE ratings.
The AFUE rating is how much heat a furnace will produce compared to the amount of fuel that it loses. If a furnace has an AFUE rating of 90%, then that means that 90% of all energy created by the furnace gets transmitted to the home. 74% furnaces are not very energy efficient, however they are cheaper, then some of the most efficient furnaces on the market are often 98 or 99% effective. In very frosty weather conditionss, it’s important to choose a high-efficiency furnace that has an AFUE rating higher than 90%. If the weather in your section is mild, then you can really get away with something less effective and cheaper. If frosty weather conditions, snow, and ice are proper Winter worries, then choose a gas furnace that can work efficiently on the hardest Winter afternoons. My husband and I picked up a very nice multi furnace with a 98% off you rating to use in our home. The temperatures in this section are always below freezing during the week of February, February, and March, and Winter can last a long time. All of us chose a furnace with a high energy efficiency so both of us never have to worry about heating the home during the Winter season. Even though it was extravagant, the choice was self-explanatory to make with numerous kids, a pet, and 2 cats in the house. The health and well being of our family has to be the first thought on our mind.