The Furnace’s Flue
High-efficiency furnaces do not waste energy by sending heat up chimney. As a result, temperatures in the flue drop low enough to produce condensation. This water combines with acids in the flue to create acidic moisture. Clay liners are particularly vulnerable to this acidic moisture assault.
Carbon monoxide (CO) is a colorless, odorless gas. Sometimes an early warning is flu-like-symptoms, but CO can cause brain damage and death with no warning. A damaged
furnace flue poses a real threat of carbon monoxide poisoning, because this gas can escape through the smallest crack. Also, a partial or complete collapse of the clay flue liner can block the flue,
and quickly fill the house with deadly gas. Sadly this tragedy occurs in homes across the country every year.
In 2001, 656 people died of unintentional non-fire exposure to gases…and there have been more than 30,000 hospital emergency room injuries per year. (Source: NFPA)
Another main component with our service is to help our customers understand the positive as well as any negative aspects to their Oil & Gas flue systems. Far too often a homeowner may switch from oil to gas and assume that flue never needs inspection or cleaning.
Truth be told our experience in the field has shown us that the worst flues as far as deterioration are oil to gas conversions.
The reason for this is an old soot laden flue now connected to a high efficiency gas furnace that does two things: