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.Know More
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
Maintain a gas furnace properly by checking and cleaning the furnace's filters, vents, blower, thermostat, ducts and fan regularly. Replacing these parts as needed is also a part of proper gas furnace maintenance.Full Answer >
BTU, which stands for British Thermal Unit, is a unit measurement often used to list how much energy a gas furnace or other heating unit produces. One BTU is the amount of energy required to heat one pound of water one degree Fahrenheit.Full Answer >
A gas furnace should be replaced when the furnace begins making weird noises, reaches a certain age or displays decreased efficiency and after the burner flame turns yellow. Generally, a gas furnace should be replaced when the furnace costs over $500 to repair or is more than 15 years old.Full Answer >
Important things to consider when purchasing a gas furnace are the size and insulation status of the space the gas furnace is intended to heat, as well as costs and availability of gas versus fuel oil in the area. The cost of electricity also needs consideration when purchasing a furnace.Full Answer >