Franklin Delano Roosevelt was the 32nd President of the United States. A leader during the Great Depression and World War II, he was famous for being the only American presideâ¦nt elected to an unprecedented four terms - from 1933 to 1945. D.k.
The Average Boiler Life Expectancy. Boiler life expectancy depends very much upon the type of boiler that you purchased. The average expectancy of a traditional gas boiler would be between 10 and 15 years, if you keep it well maintained and have it serviced annually. Other boilers, such as electrical devices, will last between 8 and 10 years.
FACT: Heating oil systems have a longer life. The average life expectancy of an oil heat appliance is 30 or more years if they are properly maintained. The average life expectancy of a natural gas furnace is only 11-14 years. And, the efficiency ratings of new heating oil systems range from 83% to 95%.nd, converting a heating oil system to natural gas is expensive, with tank removal, chimney, plumbing and duct work potentially costing over $9,000! 2. FACT: Heating oil is a clean fuel. Today, oil produces almost zero emissions and the latest oil system technologies 'reburn' fuel, lowering emissions even further.