Smoke ventilation in operational fire fighting: Part 2. Multi-storey buildings

Jukka Vaari, Jukka Hietaniemi

    Research output: Book/ReportReport

    1 Citation (Scopus)


    The effect of Positive Pressure Ventilation (PPV) on compartment fires in a 1:4 scale four-storey building was investigated experimentally. The main goal in the experiments was to find out the optimum ventilation path and ventilation rate as a function of the elevation of the fire room. Also, the smoke movement in the staircase was studied to evaluate issues related to evacuation of the building. The main quantities measured were the total rate of heat release (RHR) and the vertical temperature distributions in the fire room and rooms connected to it, as well as in the staircase. When the PPV was arranged in accordance with the generally adopted practices in fire-fighting, the benefits of PPV could be well reproduced: the visibility along the path of the fire-fighter attack was improved, and the gas temperatures were lowered. However, the RHR of the compartment fire was increased by the application of PPV. An implication of this is that there exists an optimum PPV rate which sufficiently improves the operating conditions of the fire-fighters while keeping the thermal load on the structures in the fire room to a tolerable level.
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages65
    ISBN (Electronic)951-38-5580-5
    ISBN (Print)951-38-5579-1
    Publication statusPublished - 2000
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesVTT Publications


    • fire fighting
    • fire safety
    • fire prevention
    • multi-storey buildings
    • smoke abatement
    • smoke vents
    • Positive Pressure Ventilation
    • staircase


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