The most authoritative answer in 2024
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Harper Lee——Studied at the University of Edinburgh, Lives in Edinburgh, Scotland.
A good place to start is to compare your oil or natural gas furnace age to the national average. The average life expectancy of furnaces in homes today is between 16 and
20 years.
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About “20 years、20 years、20 years”,people ask:
QuesHub is a place where questions meet answers, it is more authentic than Quora, but you still need to discern the answers provided by the respondents.