Chimneys. Residential Chimneys should be treated in a bold and effective manner so as to aid the skyline, which is a most important element of the design. This is more apparent at night or on a misty day when general proportion only can be seen. Chimneys are now designed so much with regard to economy that they have lost much of their old-time importance, and are frequently not high enough for appearance or even for creating sufficient draught in the flues.
A chimney never looks so high in execution as it does on a drawing, and allowance therefore has to be made for this by the architect It must also be remembered that in low-lying sites, and wherever overshadowed by trees or buildings, additional height must be given.
Another important point is that flues should be grouped together as much as possible, for it is far better to have two or three good-sized stacks than several small ones, as seen in pictures below.
A flue 9 in. by 9 in. in area is large enough for all ordinary domestic fires, but in order to get a more dignified effect they may frequently be made 14 in. by 9 in. They should be encased by 9 in. walls, although 4 ½ in. walls are more usual, for the extra width gives not only a sturdier appearance, but also additional strength to withstand wind pressure and prevent the ingress of driving rain, which will certainly prevent the flue from drawing properly. Chimneys on inside walls generally draw better, as they are more protected.
Georgian House with Chimneys.
House with Chimneys.