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Title: Avoid Premature Heat Exchanger Failure With Your Furnace
Author: Bill Whitworth
Article:
Just as you may have noticed that your automobile runs more
smoothly after a fresh new oil change, the same principle works
for your furnace, when it comes to a new or clean furnace
filter. The main component for both hot water and forced air
heating units is called a heat exchanger. The purpose of this
nifty component is to take the heat that is produced by burning
fuel in your furnace, and to transfer it into the water or air
so that it can be distributed through the entire house. The heat
exchanger is traditionally concealed from view in hot water
heating systems, and is only occasionally visible in forced air
systems.
If you look at a modern forced-air gasoline-powered furnace,
here is everything that you will find. First, you will find a
solid-state furnace control, which has a fan assembly and is
visible in the power rear of the furnace. Next, you will find a
draft inducer, which provides fan-forced exhaust. Third, you
will find both an igniter, and a flame sensor, because your
furnace is actually running on firepower. Next, you will find
the gas valve and manifold, along with gas burners. On the
outside of all of this you will have the heat exchanger,
followed by <b>furnace filters</b> or other air filters. Keep in
mind, several aspects of this concept will vary based on the
model of furnace that you use, though some things will remain
the same, including the igniter, the <a
href="http://www.creativehomemaking.com/cleaning/furnace-air-filt
ers.shtml">furnace filter</a> and the heat exchanger.
The thing that makes heat exchangers malfunction or inoperative
in general is the development of a hole, crack or warping that
allows hot water to escape, or combustion exhaust to escape into
the home's interior air. Heat exchangers do eventually crack or
warp over time simply because of the constant heating and
cooling that the system experiences throughout the year.
However, most heat exchangers can last a significant amount of
time, often past their predicted life span depending on whether
or not conditions are ideal. Regular cleaning and maintenance of
the furnace do play a large part in determining the life
expectancy of a heat exchanger, as well as the environment that
exists around the furnace unit.
Another heavy contributor to whether or not heat exchangers live
out their lifespan properly is reduced airflow, which comes as a
result of dirty <a
href="http://www.home-air-care.com/furnace.htm">furnace
filters</a>, dirty fan blades, obstructed air vents and dirty
duct work. All of these factors contribute to wear on the fan
motors, which can significantly reduce the efficiency of the
furnace, prematurely burning out the heat exchanger as well.
Both fuel-fired and forced-air furnace types are prone to
overheating in response to airflow obstructions. Most modern
furnaces are built in a way that allows them to shut down if
temperatures become unreasonably high based on a dirty or
overused furnace filter. However, if the internal temperature
elevation caused by dirt and debris is only moderate, the
furnace may not switch off but the heat may still be enough to
cause metal fatigue to the head exchanger, which can cause
serious issues down along the line.
The best way to protect yourself from premature burn out of the
heat exchanger in your furnace is to have an annual inspection
and a monthly cleaning of your <i><a
href="http://energyboomer.typepad.com/energyboomer/2007/07/a-clea
n-filter-.html">furnace filters</a></i>. The exam, which should
be conducted by a licensed mechanic, should be relatively
inexpensive while affording you a great deal of peace of mind.
Another useful innovation is the carbon monoxide or CO detector,
which is an easy and inexpensive way to protect yourself against
exhaust leaks from your furnace.
About the author:
Bill Whitworth writes air quality articles for <a
href="http://www.webproducts.com">Web Products, Inc.</a>, the
Internet’s premier supplier of furnace filters, air filters,
replacement filters, and custom filters.
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