12. Chimney
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Basic Characteristics of Chimneys
•Chimneys are designed to remove flue gases from appliances to a free space outside the building
where they are scattered so as not to endanger the quality of the living environment of the house's
residents.
•The chimney consists of:
•One or more chimney flues
•Chimney casing
•Sweep openings
•Pickup openings
•Vent connector
•Chimney heads, or extensions
•
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Classification of Chimneys
•According to the appliances we distinguish chimneys for:
•Solid fuel chimney x Liquid fuel chambers x Gaseous fuel chimney
•According to the structure, we distinguish chimneys for:
•Single-layer chimneys x Multi-layer chimneys
•According to the location of chimneys, we distinguish chimneys for:
•Fitted or built-in chimneys x Solitary chimneys
•According to the ground plan shape of the chimneys we distinguish:
•Square chimneys x Rectangular chimneys (up to 1: 1.5) xCircular chimneys
•
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Classification of Chimneys
•According to the size of the flue to distinguish:
•Narrow chimneys (up to 40,000 mm2) x Medium chimneys (over 40,000 mm2) x Man chimney (minimum
cross-section up to 10 m high is 450 x 450 mm)
•According to the built-in material we distinguish chimneys for:
•Chimneys made of non-flammable or non-easy possibly flammable materials
•Chimneys made of materials with an absorption capacity not exceeding 20% of the specific weight
•Chimneys made of materials resistant to the effects of flue gases
•Chimneys made of frost-resistant materials
•According to the arrangement of flues, we distinguish chimneys for:
•Continuous chimneys x Storeys chimneys x Overflow chimneys x Tree chimneys
•According to continuous longitudinal axes we distinguish chimneys for:
•Direct chimneys x Moving chimneys
•
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Design and Impementation of Chimneys
•The chimney flue should have a constant cross-section along the height.
•The chimney casing should be non-flammable, low absorptive and resistant to flue gases.
•Single-layer chimneys must have a masonry chimney thickness of at least 140 mm.
•Multi-layer chimneys are usually three-component. They are consisting of chimney liner,
an insulating layer and a chimney casing.
•The flue connector is part of the chimney, which connects the appliance and the chimney flue to
which the exhaust gas.
•Sweep openingsare designed for flue and liquid fuels that cannot be swept straight through the
chimney head.
•Pickup openings are designed at the level of the soil of the chimney flue.
•
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