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Gas furnaces are one of the most powerful forms of home heating available, capable of reaching temperatures above the range of most electrical heaters. But gas furnaces require special care to keep them running efficiently, effectively, and safely. If you have a gas furnace keeping you warm during cold days and nights, make certain that you schedule annual maintenance from a trusted contractor and call for repairs the moment you sense anything has gone amiss with the furnace.

One component of a gas furnace that must stay in good shape in order for it to provide you the efficiency you expect is the exhaust flue. If anything goes wrong with the flue, you need to call heating repair specialists. Quality Air Heating and Air Conditioning has you covered for furnace repair in Columbus, OH — any time of the day or night.

The exhaust flue and why it’s important

The process of generating heat inside a gas furnace involves burning natural gas piped in from the main gas line. This creates high temperature combustion gas that transfers to the air from the blower unit, and this heated air then travels through the ductwork. However, this leaves behind combustion exhaust — the waste product of heat exchange — a liquid vapor of carbon dioxide and carbon monoxide that needs to be safely removed from the cabinet.

The exhaust flue serves as the channel that carries the exhaust gases away from the heat exchangers. The exhaust leaves the heat exchanger and travels up the flue, which is usually a metal pipe. The flue in older furnaces runs vertically up to the roof, allowing the hot gas to naturally rise up and escape to the outside. Some advances in high-efficiency furnaces now allow the construction of horizontal exhaust pipes.

The exhaust flue is important for the safety of a furnace, since you do not want the toxic exhaust vapors back-flowing out of the cabinet. But the exhaust flue is also important to maintain furnace efficiency. If exhaust gas does not efficiently exit the furnace cabinet, it will start to react with the metal components inside and cause corrosion to develop. Corrosion often leads to the need to replace a furnace entirely, so any problems in the exhaust flue must be taken care of as soon as possible.

Regular maintenance is key

Unless you are a trained furnace repair technician, it can be difficult to detect issues with the gas exhaust until the negative effects (such as corrosion or a rise in carbon monoxide levels) become too marked. This is one of the reasons you need to have your gas furnace professionally inspected and maintained once a year. A technician will examine the exhaust flue to see that it is sturdy and clear from obstructions.

If a maintenance visit determines that you need to have the flue repaired, don’t delay: call Quality Air Heating and Air Conditioning for furnace repair in Columbus, OH right away.