How long Rheem furnaces usually last is typically 15 to 20 years with proper maintenance, which is standard for mid-range furnaces and competitive with other brands like Carrier, Trane, and Lennox that also last 15 to 20 years. Rheem Manufacturing Company, founded in 1925, headquartered in Atlanta, Georgia, owned by Paloma Industries, makes Rheem gas furnaces including Classic series and Prestige series with AFUE efficiency of 80 percent for budget and 96 percent for high-efficiency. Rheem furnaces last 15 years for basic single-stage models like Classic 80 percent, and up to 20 years for high-end variable-speed Prestige series with proper maintenance including annual professional tune-up, filter changes every 1 to 3 months, keeping vents clear, and not overheating. Factors that shorten lifespan include lack of annual maintenance, dirty filters causing overheating and short cycling, oversized furnace that short cycles, high usage in extreme cold climates, and poor installation. Rheem offers warranties of 10-year parts and limited lifetime heat exchanger warranty, which supports long life. Compared to budget Goodman which lasts 12 to 15 years, Rheem lasts longer, and compared to premium Trane which lasts 15 to 20 years, similar. So Rheem furnaces usually last 15 to 20 years, with maintenance like annual cleaning and filter changes extending to 20 years, with heat exchanger often lasting lifetime.
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