Construction of Chimneys

In Gothic Tudor buildings, such as Thornbury Castle built in 1514 we see carved brick chimneys.

Chimneys in houses were often constructed so that a single chimney could function for fireplaces on each floor of a house. This was called a “stack” and was necessary because of brick’s inability to handle traverse loads well. Often you would see two stacks in a house, one in the front and one in the back. Today we no longer rely on fire for most of our heat, but instead on central heating systems that are constructed using double wall metal piping that can bend easily and go through walls. This has made the placement of a chimney less important. In fact, some of the new high-efficiency heating systems can vent sideways through a wall, eliminating the chimney altogether.

In Gothic Tudor buildings, such as Thornbury Castle built in 1514 we see carved brick chimneys. For industrial chimneys, the construction is often external as opposed to being incorporated into the wall of the building. Industrial chimneys were often place near a central boiler, using a central ductwork to funnel gases to the chimney. In modern chimneys brick has almost been entirely replaced by single pour concrete industrial chimneys. Industrial chimneys are often very tall to enable any released pollutants to be spread over a wider area, as required by many federal and state regulations.

In moving machinery an exhaust pipe serves the same function as a chimney would in a building. The main difference between a chimney and an exhaust pipe is that gases escape a chimney through convection, while they are dispelled under pressure from an exhaust pipe.
 

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