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<p>Chimney-passage is a critical point in terms of fire safety in buildings, and the high number of fires occurred in recent years despite the chimney certification procedure, has shown the need to evaluate these aspects. This paper evaluates the reliability of European reference standards and determine if any revisions are necessary. Experimental tests aimed at comparing the temperature measured in a roof- and wall-passage, have been conducted at gas temperatures of 207, 260, 310, 410, and 520 °C on building elements 200&#xa0;mm thick. A metal chimney with a diameter of 200&#xa0;mm, insulated with 2.5 cm of mineral wool, was used in the tests. Key findings include temperatures approximately 13 °C higher at the wall passage. While these differences are not substantial enough to pose significant safety hazards, they highlight the need for further investigation to fully assess the potential risks. The temperature distribution along the chimney’s circumference was non-axisymmetric, with differences ranging between 8 and up to 15 °C, with the highest temperatures at the top of the passage. Additionally, the analysis of the test procedure has highlighted that the close proximity of the heat generator to the wall passage could result in gas temperatures much higher than those observed during certification. Findings here reported lay the groundwork for further experimental and numerical studies on fire safety in chimney installations.</p>

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Heat Transfer and Safety Risks in Horizontal Chimney Installations Through Walls

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月18日

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  • Manuela Neri,
  • Krzysztof Drozdzol,
  • Sandro Bani,
  • Mariagrazia Pilotelli

摘要

Chimney-passage is a critical point in terms of fire safety in buildings, and the high number of fires occurred in recent years despite the chimney certification procedure, has shown the need to evaluate these aspects. This paper evaluates the reliability of European reference standards and determine if any revisions are necessary. Experimental tests aimed at comparing the temperature measured in a roof- and wall-passage, have been conducted at gas temperatures of 207, 260, 310, 410, and 520 °C on building elements 200 mm thick. A metal chimney with a diameter of 200 mm, insulated with 2.5 cm of mineral wool, was used in the tests. Key findings include temperatures approximately 13 °C higher at the wall passage. While these differences are not substantial enough to pose significant safety hazards, they highlight the need for further investigation to fully assess the potential risks. The temperature distribution along the chimney’s circumference was non-axisymmetric, with differences ranging between 8 and up to 15 °C, with the highest temperatures at the top of the passage. Additionally, the analysis of the test procedure has highlighted that the close proximity of the heat generator to the wall passage could result in gas temperatures much higher than those observed during certification. Findings here reported lay the groundwork for further experimental and numerical studies on fire safety in chimney installations.