If you’re聽thinking about upgrading聽your furnace,聽an early choice in the process聽is to聽determine聽an efficiency rating.聽That first choice聽will聽influence聽your up-front costs and what you pay for home heating聽as time goes on.聽Use this guide to learn more聽about AFUE ratings and how they affect you.
What Is an AFUE Rating?
AFUE聽stands for聽Annual Fuel Utilization Efficiency. It is聽a standard for measuring聽how efficiently a聽furnace听辞谤听boiler聽switches聽fuel into heat for your home聽within a 12-month period. The higher the AFUE rating (on a scale of 0% to 100%), the more efficient the system is at converting fuel into usable heat.
How Is AFUE Measured?
AFUE ratings are聽measured聽by calculating the ratio of聽a furnace's heat output聽to the聽amount of fuel聽it聽utilizes聽in the process. This calculation聽accounts for聽the energy lost through exhaust gases, radiation and other聽elements聽that聽decrease聽efficiency. The result is聽shown聽as a percentage, representing the聽share聽of fuel converted into heat.
Figuring out聽a聽heating system's聽AFUE rating聽entails聽conducting a聽conventional聽test cycle to聽quantify聽the heat output and fuel consumption. This test cycle is聽structured聽to simulate聽ordinary聽heating conditions聽throughout聽the year, including both聽on and off聽periods. The heating system聽is then run聽at聽full聽capacity for聽a prolonged聽period to聽define聽its peak performance.
What Is the Minimum AFUE Rating in 2023?
罢丑别听聽has聽slowly聽increased HVAC efficiency ratings over the聽last聽few聽decades聽in an effort聽to聽encourage聽energy efficiency and reduce聽greenhouse gas emissions. In 2023, the minimum rating for new gas furnaces聽was recalculated to be聽81 AFUE. From 2015 to 2022, the South and Southwest regions had a minimum rating of 80 AFUE, and the North聽called for聽furnaces to be rated 90 AFUE or聽better. Better AFUE ratings聽reduce聽energy consumption, lowers聽utility聽bills and聽decreases聽the environmental聽impact聽of heating your home.
Why Do Gas Furnaces Jump from 80 to 90 AFUE?
When聽researching聽for new furnaces, you may聽notice聽many models around 80 and 90 AFUE,聽with little in between. This is聽because聽the technology聽required聽to exceed 80 AFUE聽causes聽a聽considerable聽jump聽in performance.
The 80 AFUE threshold has been the minimum聽criteria聽for gas furnaces in the聽United States聽since the 1990s. At this level, furnaces聽convert聽80% of the fuel they consume into heat, with the remaining 20%聽forfeited聽to the atmosphere through the flue.
Gas furnaces must聽use聽more聽advanced聽technology to聽secure聽higher AFUE ratings, such as two-stage or modulating gas valves, variable-speed blowers and聽secondary聽heat exchangers. These聽solutions聽help the furnace聽pull聽heat from the fuel聽source聽more effectively,聽raising聽efficiency from 80 to 90 AFUE or higher. Today’s聽most popular聽furnaces cap out at聽around聽98.5 AFUE.
How Do AFUE Ratings聽Determine聽Furnace聽Prices?
罢丑别听total price聽of a furnace with a higher AFUE rating is聽typically聽more聽than that of a lower AFUE-rated furnace.聽Basically, more聽advanced聽technologies come聽with a higher price tag. The exact cost difference聽is determined by聽the furnace聽manufacturer, size and efficiency rating.
When聽considering聽the聽initial cost聽of a more efficient furnace,聽keep in mind聽the聽long-term聽energy savings that awaits you. 罢丑别听real chance聽to save money on聽utility聽bills for the next聽ten years聽or longer聽will definitely allow聽you to recoup the聽additional聽up-front investment.
Should You聽Buy a Furnace with the Highest AFUE Rating Possible?
Though聽a higher AFUE rating聽leads to聽more effective聽home heating and聽lower聽energy bills,聽we are not saying聽all homeowners聽should聽purchase聽a 95 AFUE furnace.聽Here are the聽factors to聽think about聽when聽evaluating聽costs and efficiency ratings:
- Seasonal weather conditions: The colder the聽weather, the聽longer聽your high-efficiency furnace聽runs, and聽the sooner it will provide a return on investment.聽Therefore, higher AFUE ratings are聽most suitable聽in cold climates that聽demand聽more heating than cooling to聽sustain聽a聽pleasant聽indoor temperature.
- How long will you live there?: If you聽envision聽living in your home聽for some time,聽choosing聽a high-efficiency furnace聽may聽be a聽smart聽investment聽given that聽it will pay for itself聽over the next few years聽in energy savings.聽But, if聽you're going to move within the next few years, the extra cost of a higher AFUE-rated furnace聽would not be recommended.
- The cost of fuel: 罢丑别听impact聽of an efficient furnace is more聽evident聽when energy costs are higher. You’ll聽realize the savings each month聽once聽your furnace converts a higher percentage of fuel into usable heat for your home.
Install聽a New Furnace Today
For help determining聽the聽ideal聽furnace聽system for your needs and budget,聽choose聽天美传媒. We can help you聽weigh聽the聽initial聽costs and long-term benefits of different AFUE ratings to聽guide聽your decision.聽We're so confident you'll be satisfied with our services聽that we offer a聽Service Experts Guarantee!聽For more information聽or to schedule a聽complimentary聽furnace installation estimate, please聽contact聽a聽天美传媒 office near you.
