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Dirty chimney can cost you money -- and your house

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By the Carey Brothers
Breaking news from the North Pole: Well-informed sources have it that Ol' St. Nick has been forced to replace his bright red uniform with a new one. All of this is as a result of extensive soiling because of unusually dirty fireplaces this holiday season.
While we are sure that St. Nick's wardrobe is something that is of concern to many, there are other more critical reasons to keep one's fireplace and chimney clean and in tiptop operating condition.
In fact, a dirty chimney will not only diminish the effectiveness of a fireplace, but, with severe neglect, could result in a chimney fire. And chimney fires lead to house fires.
The first step to having a healthy fireplace is by burning the right fuel. Never burn garbage, plastics, foil, coated paper, or painted or chemically treated scrap wood.
In addition to causing an unfavorable build up on the interior of the firebox and chimney, these also produce noxious fumes that pollute the air (in and out of the home). Burn only seasoned split wood.
Seasoning allows moisture in wood to evaporate. Forty-four percent more heat can be generated from a seasoned log. A clean burning fire is a hotter fire with good drafting conditions that produce cleaner combustion and less smoke from the chimney.
The next step is to have your chimney inspected by a professional chimney sweep annually and, if necessary, cleaned of soot and creosote, which is a chemical substance that forms when wood burns. It is the heavy creosote build-up that becomes highly flammable often resulting in explosive chimney fires.
According to the National Chimney Sweep Guild, a national trade association for chimney sweeps, a visual inspection is all that is required for most chimneys.
In the case where a visual inspection is not adequate, many chimney sweeps are now equipped to do more elaborate inspections with a video camera and monitor referred to as a "chimscan." The chimscan is more costly than the visual inspection ($150 to $250), but will reveal significantly better information about the condition of a chimney.
This is especially important when the integrity of the flue is in question because of age or damage from an earthquake or chimney fire.
Finally, as part of the inspection and cleaning, the chimney sweep will also make comments relative to the condition and operation of the damper and spark arrester. Frequently, these will either not exist or are in such a state where they need replacement.
The damper is a steel or cast-iron door that opens or closes the throat of the firebox into the flue. It regulates draft and prevents the loss of heat up the chimney. The spark arrester is a cagelike device that is secured to the top of the chimney. It prevents sparks and ash from escaping and causing a fire on the roof or other potentially flammable substance.
It will also keep squirrels, birds and raccoons from nesting in the chimney. Nesting materials can cause a serious safety hazard. Their droppings pose health risks because diseases can be transmitted through their fecal material. A spark arrester will prevent this.
For tips from James and Morris Carey, go to or call the listener hot line, 800-737-2474, ext. 59. The Careys are also on KRKO (1380-AM) from 6 to 10 a.m. every Saturday.
Story tags » Home Improvement

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