Combustion byproducts accumulate within a flue system during the burning of fuels such as wood, oil, or gas. This material, often a combination of soot, creosote, ash, and condensed vapors, adheres to... Read more »
The deposit left behind in a flue after burning fuel is commonly known as soot. This substance, often dark and powdery, is a frequent answer in puzzles requiring a three-to-six-letter word associated... Read more »
