How long does a furnace last in Utah?
A well-maintained gas furnace in Utah typically lasts 15-20 years, with 80% AFUE models averaging 18 years and 96% AFUE condensing models averaging 15-17 years due to condensate-related component wear.
A well-maintained gas furnace in Utah typically lasts 15-20 years, with 80% AFUE models averaging 18 years and 96% AFUE condensing models averaging 15-17 years due to condensate-related component wear.
A well-maintained gas furnace in Utah typically lasts 15-20 years. Non-condensing 80% AFUE models often reach 18-22 years because their exhaust is hot and dry — no acidic condensate to corrode internal components.
Condensing 96% AFUE furnaces average 15-17 years because the efficiency comes from wringing water out of the exhaust, and that water is mildly acidic, shortening the life of the secondary heat exchanger, inducer, and condensate trap.
Utah's dry air actually helps — humidifiers add moisture back in winter, but the low summer humidity reduces corrosion on the AC coil sitting on top of the furnace.
The biggest lifespan factors in Utah are annual maintenance (to keep burners and heat exchangers clean), correct sizing (oversized furnaces short-cycle and wear out faster), and filter changes (dirty filters starve airflow and overheat the heat exchanger).
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Last reviewed April 1, 2026.