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Cracked heat exchangers: cause & effect

(This is why it is very important to have your furnace checked and maintained prior to the heating season.)

"HVAC: Heating, Ventilation, Air Conditioning" Cracked Heat Exchangers: Cause & Effect The metal heat exchanger of a furnace, expanding and contracting hundreds of times each year as the furnace cycles “on” and “off”, will eventually produce hairline cracks.

Combustion (gas or oil) takes place inside a sealed heat exchanger. The only outlet for the products of combustion is the chimney.

Air to be heated, is forced around the exterior of the heat exchanger (by the blower) where it absorbs heat from the hot surface of the exchanger and delivered into the house.

Fine hairline cracks in the exchanger permits some of the products of combustion (including carbon monoxide) to be absorbed into the air stream and enter the house.

As AGA (American Gas Association) considers only 15 parts per million to be hazardous, the furnace should be immediately turned off.

If your furnace has been diagnosed as having a cracked heat exchanger, we offer a "FREE 2nd Opinion". Call us today @ (757) 600-0422 for details.

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