The average lifespan of a gas furnace is 15 to 25 years. However, lifespan depends on a number of factors, including when the furnace was built, the materials it is made out of and maintenance.Continue Reading
Older gas furnaces tend to last longer because they have very simple designs and are made out of heavier metals. However, these furnaces are often far less efficient than modern models, and they lose efficiency as they age and their parts degrade.
The materials used in gas furnaces also play a role in life span. Heavier materials tend to break down more slowly than lighter ones, which makes them last longer. However, heavy steel and iron parts are not always as efficient as lighter materials. For example, modern condensing furnaces have plastic pipes, which tend to break down faster than metalbut metal pipes are less efficient as they absorb heat.
Maintenance is a major factor in furnace lifespan. Homeowners can boost lifespan by:
Homeowners should replace furnaces that do not distribute heat evenly throughout the home, that break down frequently, that make a lot of noise or that do not work efficiently.Learn more about Heating & Cooling
The average lifespan of a central air conditioning unit and its components is between 15 and 20 years, but an air conditioner's lifespan can be affected by installation, usage and general maintenance factors, notes SaveEnergy123.com. Air compressor and fan relay controls can sometimes prematurely wear out due to high usage, oversized systems or inadequate maintenance.Full Answer >
The primary difference between a gas forced-air furnace and an electric furnace is the fuel source. Furnaces have used many different fuel sources throughout history. The fuel produces heat, and a blower pushes the heat through a system of vents to different areas of the home.Full Answer >
Electric furnaces are cheaper upfront than gas furnaces and have a longer life expectancy. The installation process for an electric furnace is cheaper and, compared to that for gas, poses less risk to safety.Full Answer >
Oil furnaces burn heating oil, which is similar to diesel, while gas furnaces use natural gas. Heating oil is delivered by truck to each customer and stored in an aboveground storage tank. Natural gas customers are hooked up to the local gas company lines.Full Answer >