What should I pay attention to when building my own fireplace?

Domestic villa chimneys are similar to foreign chimneys in appearance design, but the internal structure is not up to the standard of direct burning firewood. If the stove has not been designed and reformed by professionals, it will leave a series of hidden dangers: the diameter reserved for chimney construction is very large-it is convenient for the laying of fireplace smoke pipes during indoor decoration, and most of them go straight to the top. If there is no special flue for fireplace, burning firewood directly under the chimney will often lead to excessive ventilation; Most of the heat released by wood combustion is taken away by exhaust gas through the chimney, and only a small amount of heat enters the room, which causes a huge waste of energy and cannot effectively heat the room. A large number of chimneys pull out the wind, which makes the combustion too fast, consumes a lot of firewood and increases the use cost of the fireplace; Intense combustion will consume a lot of indoor oxygen and affect indoor air quality; In a poorly designed furnace, most of the fuel burns on the ground, producing a lot of hydrocarbons. Incomplete combustion will produce harmful gases such as carbon monoxide. In the case of unreasonable chimney design (in most cases), toxic gases can easily flood into the room. Incomplete combustion produces smoke at the same time. When the chimney is unstable or windy, smoke and dust will pour into the room, polluting the wall top and furniture. If people inhale it carelessly, it will seriously endanger their health. ? The coke ash produced by incomplete combustion accumulates on the inner wall of the chimney for a long time, which may cause the inner wall of the chimney to catch fire when it reaches a certain thickness (chimney? The chimney fire temperature is very high, which will cause extensive damage to the indoor wall, and in serious cases, it will cause fire danger. When the chimney is ventilated in the opposite direction, the flame rushes into the room and sparks everywhere, which may cause fire danger.

At present, most chimneys in China do not use fire-resistant heat insulation materials, and the burning heat may make the inner wall of the chimney and the wall around the furnace discolor or even fall off, which will affect the appearance and cannot be repaired (as long as the fireplace is still in use). A large amount of ventilation in the chimney will cause negative indoor air pressure, forcing cold air to be replenished from doors and windows to the room. When the effective heat of wood combustion is not enough to heat the supplementary cold air, the average indoor temperature will drop instead of rising. In the case of low temperature in winter, when the old hearth is not ignited, because the flue cannot be effectively closed, a large amount of cold air in the chimney will pour indoors, which not only reduces the temperature around the fireplace, but also wastes energy and brings dust into the indoor chimney, seriously polluting the indoor environment.

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