The Anatomy of the Fireplace; Flues

Here at Pearson Sweep, it’s only right to assume that we know the ins and outs of everything to do with chimneys which is why we’ve decided to share this knowledge with our readers! After all, there are many things that one must consider when it comes to buying a new fireplace or having one installed and understanding the internal structure of a chimney may help with this. Here is everything you need to know about chimney flues…

When a fire burns, it gives of a range of different combustion gases. We provide them with a way to escape our homes via the chimney flue, however once they are carried away, they must be replaced by clean fresh air. Years ago we relied upon a natural draught but now modern developments make it very unlikely for these natural airflows to exist so we have to create an artificial one with ventilation. Contrary to popular belief there are a few different types of chimney flues and each allow us to create the ventilation required. In fact, some flues do not need a chimney whilst others do. In this blog, we’re going to go over both types…

Without a Chimney

Balanced Flue: Built into the fire, this type of flue runs through the wall, taking in fresh air and releasing the gases out. A balanced flue often comes with glass fronted fires so that there is a barrier between the fire and the air in the actual room.

Power Direct Flue: A flue with a fan, this design literally sucks the combustion gases through the flue in order to take them outside. A power flue can be extended so one may be able to have a fireplace/chimney however an electric supply is required in order to work the fan.

Flueless: Although it sounds like it contradicts itself, some designs are flueless and the combustion gases are removed using something called a catalytic converter. These fires are very efficient because there is no heat lost through a flue however they require a large room.

With a Chimney

Unlined Flue: These are the basic type of flue that comes with most chimneys and is often constructed using brick or stone.

Lined Flue: On the other hand, modern chimney adaptions have created the lined flue where a concrete or metal liner is placed inside the chimney itself.

Perhaps the most important part about owning a working fireplace is remember to having it regularly swept and inspected. If homeowners neglect this part of owning a fireplace and chimney, it can lead to the spreading of carbon monoxide or even a chimney fire. If you think your chimney is overdue an inspection, get in contact with the best chimney sweep in Manchester today and book one in!

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