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  • 1 Slovak University of Technology in Bratislava Radlinského 11, 81005 Bratislava, Slovakia
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Retrofit of the old building stock presents a good possibility to reduce the energy consumption. However, as the envelopes of old buildings become tighter, a risk increases that the fresh outside air supplied to the indoor environment by natural infiltration can decrease below the amounts required for a comfortable indoor environment, especially in buildings where mechanical ventilation has not been installed. This study presents an efficient method to measure the ventilation intensity, demonstrated on a 40-years old high-rise office building after a complete envelope retrofit. The well-established tracer gas decay and tracer gas step-up method were employed to obtain the ventilation intensity, using the natural CO2 produced by the occupants as the tracer gas. The measured values of the air change rate were between 0.1 and 0.7 1/h for the simple façade, whereas it ranged from 0.2 to 0.5 1/h for the double skin façade, with the windows closed. The level of compliance with ventilation requirements varied, depending on the standard and the philosophy adopted.

  • [1]

    Magyar Z. Buildings in the key role in the EU energy efficiency action plan, REHVA Journal, Vol. 48, 2011, pp. 8688.

  • [2]

    EN 15251, Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics, Brussels, European Committee for Standardization, 2007.

  • [3]

    ASHRAE, Ventilation for acceptable Indoor air quality, Atlanta GA, American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE Standard 62.1-2007), 2007.

  • [4]

    CR 1752, Ventilation for buildings, Design criteria for the Indoor environment, Brussels, European Committee for Standardization, 1998.

  • [5]

    Persily A. K. Evaluating building IAQ and ventilation with indoor carbon dioxide, ASHRAE Transactions, Vol. 103, 1997, pp. 193204.

  • [6]

    ASHRAE Handbook, Fundamentals, Atlanta GA, American Society of Heating, Refrigerating and Air Conditioning Engineers, 2013.

  • [7]

    ASTM, ASTM Standard E741-00 (Reapproved 2006), Standard test method for determining air change in a single zone by means of a tracer gas dilution, West Conshohocken PA, American Society for Testing and Materials, 2006.

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