The Anatomy of Your Average Chimney
Anatomy of Your Chimney
This is most often found in prefabricated chimneys. This attachment sits at the top of the opening of the flue. It helps to keep the rest of the chimney safe from water damage. It will stop rain and other moisture from settling into the cracks and it will also keep nosey critters from climbing down the chimney. In mason work, this is referred to as the chimney crown.
How A Chimney Works
The purpose of your chimney is to vent smoke from the combustibles used in your stove or fireplace. The gas and smoke will rise up through the draft and flow process. The more flame in your fireplace, the higher the warm gas will rise in the flue and cold air outside will be pulled down to encourage combustion. The pressure in your chimney on the inside of your house needs to be monitored to prevent improper flow.
The main things that affect the draft and flow process, specifically the pressure is the air movement in the home, the amount of air in the space, and how much competition there is for cold air outside the chimney. If you have windows open, or if your home is not properly insulated, it can lead to poor chimney performance. This can be as simple as a fireplace that doesn’t produce much heat to copious amounts of smoke blowing back into the house instead of venting outside. Understanding the anatomy of your chimney is the best way to ensure that you operate your fireplace in a way that allows it to work efficiently.