Burning fossil fuel (Wood, Coal etc.) produces soot, creosote and tar. This is carried up through your chimney flue to escape through the opening at the top. Some of these substances will cling to the inside of the lining, and over time the flue will become congested or even blocked completely. Not only does this prevent the way that your fire or stove performs, producing less heat and allowing smoke to enter the room, but it also stops dangerous gases such as carbon monoxide from exiting the flue, presenting a significant and potentially fatal health risk to you and your family. There is also the risk of a chimney fire when deposits are allowed to build up in the flue. Chimney flues and pots are also popular nesting places for birds and even squirrels, another cause of blockages that would present the risks as described above.
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