One key to distinguishing between candle soot deposition and a cracked heat exchanger is the prevalence of soot âIf the inside of the exhaust pipe of a car is black, what does it mean?â Generally, black soot in the exhaust tailpipe would indicate a too rich fuel mixture, leaving partially burnt exhaust deposits. candle soot deposition. Thanks, that is logical, but I think it's clear it's rising from the outlet. Candles can be a great addition to a room, but they have a dark side: http://bit.ly/2xrQO1T Black Soot Deposition (BSD) is a common problem. This condition poses a much greater danger in terms of carbon monoxide poisoning and should be one of the first items checked when evaluating a soot deposition problem. At Zuoqiupu glacier -- a bellwether site on the southern edge of the plateau and downwind from the Indian subcontinent -- black soot deposition increased by 30 percent between 1990 and 2003. We describe a case of a â black bronchoscopy â due to severe soot deposition as a result of smoke inhalation during a household fire in a 71-year-old woman. But there are also examples of deposition which are beneficial, like the process of making dry ice from carbon dioxide, the making of ammonium sulfate and ammonium nitrate. Heating appliances that do not have soot around them can be the source of soot in other rooms. Candles are one source of soot. If a CPAP machine is running at the same time, it wont take much for those black soot â¦ Secondly, under imperfect combustion conditions, candles emit soot and can cause property damage by blackening walls, ceilings, and carpets. The term â black bronchoscopy â is used to describe the black pigmentation of the airways. It is a very little known thing known as âBlack Soot Deposition.â When candle wax burns, it produces small, black soot particles that attach to things around the house, especially on walls or carpet. If left untreated, BSD can discolour walls, ceilings, fabrics and furniture, and usually appears as dark spots or discolouring on carpet. Deposition of the particles is most affected by surface electric charge, temperature, and moisture content. There have been an increasing number of complaints regarding black soot deposition in homes in the last decade. Any time deposition of soot, dust, or carbon appears, first there must be a source of the material, and second, there must be a driving force to cause the material to deposit itself on a surface. 4 years ago. It's the time of year in New Jersey when temperatures are falling and we turn on our home heating systems. Black soot disposition (BSD), commonly referred to as âghostingâ and âdirty house syndromeâ, is an unfortunate side effect of incorrectly burning poor quality candles. Sources of the Soot Investigations in buildings across the nation reveal multiple sources of the stains. What's the source of this mysteriously appearing soot deposition? Inside a vehicleâs exhaust, we can often find a black soot that dries up into solids because of vehicle engineâs waste. Your answer may lay in the heating system of your Hunterdon County home: A puff back. Black sooty stains are darkest right over the warm air supply register at the floor in the photo's lower right corner© There are no stains or soot marks on the building walls where pictures have just been removed; Black sooty stains are less dark on the wall surface as we â¦ It is a rare condition with multiple etiologies. Soot can move a long distance from the source before being deposited. The cores support the hypothesis that black soot amounts in the Himalayan glaciers correlate with black carbon emissions in Europe and South Asia. But, suddenly you're finding black soot in your house, coming from the heating vents.