Chimneys and flues

Inspect home heating systems chimneys and flues must be inspected and cleaned by a qualified technician every year. Keep chimneys clear of bird and squirrel nests, leaves, and residue to ensure proper ventilation. 

Flue Liner. A fireclay shape for use in the flues and chimneys of domestic heating appliances BS 6461 is a code of practice for the design and installation of domestic masonry chimneys and flues. See also chimney linings. 

Chimneys and Flues. Fire can arise from ignition of accumulated soot or inadequate separation from combustible material. 

In normal use, structural concrete is not exposed to temperatures above approximately 50 °C. In special structures, however, the exposure temperature may be considerably higher this is for example the case in certain industrial plants such as concrete floors below furnaces, structures in retort houses and foundries as well as in certain chimneys and flues. In these cases, the concrete is exposed to high temperatures for a long time,... 

Gas-Fired water heaters are also made more efficient by a variety of designs that increase the recov-ei y efficiency. These can be better flue baffles multiple, smaller-diameter flues submerged combustion chambers and improved combustion chamber geometry. All of these methods increase the heat transfer from the flame and flue gases to the water in the tank. Because natural draft systems rely on the buoyancy of combustion products, there is a limit to the recovery efficiency. If too much heat is removed from the flue gases, the water heater won t vent properly. Another problem, if the flue gases are too cool, is that the water vapor in the combustion products will condense in the venting system. This will lead to corrosion in the chimney and possible safety problems. 

Forced draft ducts Induced-draft flues and breeching Chimneys and stacks Water lines (max.)... 

The air and flue gas management system includes the various baffles, dampers, fans, dust collectors, scrubbers, and other FGD and emission control equipment, and the boiler flues and stack (chimney). 

Further problems could include damaged or deteriorating flue liners, soot buildup, debris clogging the passageway, and animals or nesting birds could also obstruct the chimney. Oil flues need to be cleaned and inspected annually because deposits of soot may build up on the interior walls of the chimney. Tab. 5.7 gives an overview of possible harmful failures of indoor combustion systems. 

Each cauldron is provided with a separate fire, the flues from which run into a common chimney, and each firs is provided with a separate damper for regulating or stopping the draught. 

It is no iincommoh thing to And long lead flues attached to the chamber, for the purpose of carrying off the residual vapors to the chimney. These flues invariably teko a most circuitous course, many times longer than the direct route and as frequently there is no obstacle or ether such reason why the flue should not follow the most direct line, one iB inclined to... 

The back end of the boiler was also modified to make room for a catalyst with a larger cross section area. After the modification the cross-sectional area used for the catalyst was 275 177 mm. As part of the convection section was used for this modification there was an increase in the flue gas temperature in the chimney and thus the boiler efficiency dropped. In a commercial boiler this would have to be... 

Backdrafting - The flow of air down a flue/chimney and into a house caused by low indoor air pressure that can occur when using several fans or fireplaces and/or if the house is very tight. 

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