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The ABC’s of Home Heating – Heat Exchangers

In a gas furnace, the heat exchanger is one of the most critical components of the heating process. It’s where the combustion gasses enter after exiting the burners. As the combustion gasses are drawn into the heat exchanger, heat is transferred onto the heat exchanger walls. The combustion gasses, which are at this point beginning to cool down, exit through exhaust pipes by a draft inducer blower and are sent out of the home. In a high efficiency furnace, these gasses go through a second heat exchanger where even more heat is extracted before they are vented out of the home.

As part of the heating process, a blower motor and fan take air from inside the home and draw it across the heat exchanger, which has been heated by the combustion gasses. The air picks up heat from the heat exchanger walls and is blown through the home’s ductwork, where it then exits through vents throughout the home.

Because the heat exchanger is responsible for removing exhaust fumes from the home, it’s important that a qualified heating technician inspect the unit for any cracks or damage that can cause dangerous carbon monoxide gas (CO) to leak into the living space.

Have questions about your furnace heat exchanger? Call ABC Plumbing,Heating, Cooling and Electric. We’re here to help.

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  • “Have never had such an excellent technician to evaluate our furnace problem. If he hadn't been so thorough, it possibly could have resulted in a carbon monoxide disaster. A true professional!”

  • “After a long day on a Friday (first snow of the year - lots of customers without heat), Dion L came to perform routine furnace inspection and filter change. Dion was courteous, efficient, informed us of all that he was doing, showed us an area of concern and how we…”

  • “Ron S., fixed an electrical short in the attic, which prevented a fire. He rewired the attic thru the bedroom ceiling light. He replaced an outside electrical connection, and repaired my ceiling fan. The attic wiring was very crazy. He did an outstanding job figuring it out and fixing the…”

  • “I called other before I call ABC and was giving long wait and schedule time to come out and check the heating system. So I received a message on the web about ABC Plumbing and Heating. So I called the company right away and they said what time would you…”

  • “I am so impressed with Chris and ABC Plumbing, Heating, Cooling. His friendliness honest approach to his Job is remarkable. Thanks Chris for making my day and believing that they are still great honorable people out there.”

  • “Paul B. serviced my furnace yesterday with an inspection and cleaning. He didn't stop there though, I had purchased a new filter for my humidifier on the furnace and he replaced that for me, showed me how to do it in the future and explained how to adjust the humidity…”

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