A good furnace efficiency rating depends on your home's heating load, condition, fuel use, and the amount of heat needed through a Utah winter. Furnace efficiency is measured by AFUE, or Annual Fuel Utilization Efficiency. An 80% AFUE furnace converts about 80% of its fuel into usable heat over the heating season, while high-efficiency furnaces reach 90% AFUE or higher.
Scott Hale Plumbing, Heating & Air helps homeowners compare efficiency, equipment, and heating needs through our furnace services in Murray, Salt Lake City, and surrounding communities.
What Does AFUE Mean?
AFUE measures how efficiently a furnace converts fuel into usable heat over an entire heating season. A furnace with a 95% AFUE rating converts approximately 95% of the fuel it consumes into heat for the home, with the remaining energy lost through the combustion and venting process.
AFUE makes it easier to compare the fuel efficiency of different furnaces, but it does not tell the whole story. The rating does not include electricity used by the blower or heat lost through leaky or poorly insulated ductwork. Home insulation, thermostat settings, weather, and heating habits also affect total heating costs.
What Counts as a Good Furnace Efficiency Rating?
An 80% AFUE gas furnace converts about 80 cents of every fuel dollar into usable heat. Furnaces rated at 90% AFUE or higher reduce fuel waste further, while high-efficiency condensing furnaces commonly reach 95% AFUE or above. For Utah homes in ENERGY STAR's northern climate region, qualifying gas furnaces must meet a minimum 95% AFUE rating.
Higher efficiency matters in the Salt Lake Valley, where winter temperatures drop into the teens and furnaces spend months heating local homes. A higher AFUE rating reduces the amount of fuel wasted during that heating season, but equipment cost and installation requirements also affect the decision.
For homeowners considering new equipment, heating installation starts with the home's actual heating needs rather than choosing a furnace by AFUE alone. The efficiency rating, heating load, fuel consumption, and expected time in the home all belong in the decision.
Why Sizing, Installation, and Maintenance Matter
A high-efficiency furnace still needs to match the home. We look at layout, insulation, windows, ductwork, construction, and heating load when determining equipment size. This is especially important in older Murray and South Salt Lake homes that have been remodeled, expanded, or updated over time.
Oversized equipment short cycles, while undersized equipment struggles to meet heating demand during cold weather. Installation details such as airflow, duct connections, controls, venting, and condensate management also affect how the furnace operates.
Professional heating maintenance keeps filters, burners, airflow components, controls, and safety systems on a regular service schedule. If an existing furnace has heating problems or component failures, furnace and heating repair addresses the equipment before replacement is assumed.
During Utah's winter inversion season, furnaces run heavily while already-dry outdoor air adds to the already low indoor humidity. Furnace service keeps the heating equipment operating as intended, while whole-home humidity control addresses the dry indoor air that comes with the season.
Furnace Guidance in Murray, Salt Lake City, and Nearby Areas
Scott Hale Plumbing, Heating & Air has served Salt Lake City, Utah County, and surrounding communities since 1984. Our local technicians live in the neighborhoods they serve, giving our team firsthand familiarity with homes throughout Murray, Midvale, Salt Lake City, Draper, and the surrounding Salt Lake Valley.
Learn more about Scott Hale and our more than 40 years of local service. You can also explore our service areas to find additional communities covered by our heating team.
Schedule Your Furnace Service Today
The highest AFUE rating is not automatically the best choice for every home. An evaluation of your heating load, existing system, ductwork, and budget gives you the information needed to compare furnace options.
Scott Hale Plumbing, Heating & Air provides furnace installation, repair, and maintenance throughout the Salt Lake Valley. Financing is available for qualified homeowners considering new heating equipment. Schedule your furnace evaluation online today.
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FAQs About Furnace Efficiency
What is a good AFUE rating for a furnace?
An 80% AFUE furnace provides standard fuel efficiency, while furnaces rated at 90% or higher reduce fuel waste further. The best rating for your home depends on heating demand, equipment cost, fuel use, and how long you expect to own the system.
Is a 95% AFUE furnace worth it in Utah?
A 95% AFUE furnace uses a greater percentage of its fuel for heating than an 80% model, which matters during Utah's heating season. Equipment cost, installation requirements, home heat loss, fuel prices, and expected ownership period determine the financial difference.
Can a high-efficiency furnace lower heating costs?
Yes. A higher AFUE rating means less fuel is wasted during the heating season. Actual savings depend on weather, fuel prices, thermostat settings, home heat loss, system sizing, and the efficiency of the furnace being replaced.
Does furnace maintenance improve efficiency?
Furnace maintenance keeps airflow, burners, controls, and other components operating as designed. It does not change the furnace's rated AFUE, but it addresses conditions that interfere with normal heating operation.
Should I replace an 80% AFUE furnace?
Not solely because it has an 80% AFUE rating. Equipment condition, repair history, heating costs, home heating needs, and the cost of replacement determine when moving to a higher-efficiency furnace makes sense.
