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Chimneys, Flues and Fireplaces
CHIMNEYS AND FLUES A chimney is a structure containing a flue or flues, which route any smoke and gases produced by a fire or furnace to the outside. A flue is a sealed pipe or channel that may be contained within a chimney or a self-contained unit independent of the chimney. Chimneys and flues must be capable of producing sufficient draft to maintain the fire and remove the products of combustion. Chimneys, flues and fireplaces must be carefully built to minimize fire hazards. Ideally, they should not be located on outside walls. Locating them within the house keeps the chimney, flue and fireplace warmer, giving a better draft and reducing condensation inside them. Chimneys and flues must extend at least 900 mm (36 in.) above the highest point where the roof meets a chimney and must be at least 600 mm (24 in.) higher than any roof surface within 3 m (10 ft.) of the chimney (Figure 144).
144 Chimney height above the ridge 900 mm (3 ft.) minimum 3 m (10 ft.)
chimney extends at least 600 mm (2 ft.) above any part of a roof within 3 m (10 ft.)
roof
masonry or prefabricated chimney
CHIMNEYS AND FLUES A chimney is a structure containing a flue or flues, which route any smoke and gases produced by a fire or furnace to the outside. A flue is a sealed pipe or channel that may be contained within a chimney or a self-contained unit independent of the chimney. Chimneys and flues must be capable of producing sufficient draft to maintain the fire and remove the products of combustion. Chimneys, flues and fireplaces must be carefully built to minimize fire hazards. Ideally, they should not be located on outside walls. Locating them within the house keeps the chimney, flue and fireplace warmer, giving a better draft and reducing condensation inside them. Chimneys and flues must extend at least 900 mm (36 in.) above the highest point where the roof meets a chimney and must be at least 600 mm (24 in.) higher than any roof surface within 3 m (10 ft.) of the chimney (Figure 144).
144 Chimney height above the ridge 900 mm (3 ft.) minimum 3 m (10 ft.)
chimney extends at least 600 mm (2 ft.) above any part of a roof within 3 m (10 ft.)
roof
masonry or prefabricated chimney
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