I guess we all know that a chimney is a structure for exhausting hot flue gases or smoke (products of combustion) from a fireplace to the outside atmosphere.
Chimneys are typically vertical, or as near as possible to vertical, ensuring that these gases flow upwards smoothly and at an appropriate rate, drawing air into the combustion process at the same time in what is known as the stack effect. The space inside a chimney is called a flue.
Typically, for a UK gas fire, the internal diameter of a flue will be between 125mm (5″) and 200mm (8″).
Many older masonry chimneys will have a larger flue, typically a 9″x9″ brick opening or larger. Older chimneys may have to be lined in the event they become unsound.
Not all UK homes have a chimney, but it is almost always possible to exhaust the products of combustion from a gas fireplace in any type of home – new or existing – by someone with the necessary experience and technical expertise.
For example, one can install a factory-made twinwall flue system for Class 1 or 2 gas fires, although this can be disruptive in any rooms above the fireplace.
Many modern high-efficiency gas fireplaces do not require a chimney at all. Such balanced flue appliances are typically installed near to an outside wall and the flue can be run directly through the outside wall, negating any need to go through a bedroom, for example.
Many balanced flue gas fires and fireplaces also use inexpensive flue components to create an up-to-ten metre-long flue which can be installed either horizontally through an outside wall, vertically through a house – or a combination of both.
Finally, almost any flue can be made to do quite extraordinary things by adding a suitable chimney fan with electronic controls – and a lot of technical know-how.
So, if you still long for that see-through or central fireplace but only have a small diameter flue – or your chimney just won’t work – well, call us!
At Urban Fires we provide creative chimney & flueing solutions including chimney lining, the supply/install of factory-made flue systems, the design and installation of bespoke flues – horizontal and vertical – plus balanced flue gas fireplaces and chimney fans.
We operate a free telephone and email help scheme and an on-site advisory service anywhere on mainland UK.