Low-energy mechanical ventilation: a case study of two new office buildings

Claus Wessel Andersen, Christian Anker Hviid

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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    In 2010 an internationally renowned company initiated an architectural competition for two new office buildings to be constructed in Denmark. The design objectives were to construct a sustainable office building according to Danish low energy class 2015, with a good indoor climate and with as
    little energy consumption as 41.1 kWh/m2/year including heating and all building services with no use of renewable energy such as PVcells or solar heating. One of the key means of reaching the objectives was to implement mechanical ventilation with low pressure loss and therefore low energy consumption. The project consists of two buildings, building one is 6 stories high, and building two is
    4 stories high. The buildings have a gross area of 50,500 m2 including underground parking. The ventilation and indoor climate concept was to use mechanical ventilation together with mechanical cooling and fanassisted
    natural ventilation for free night cooling, hence minimizing the energy consumption for cooling. The paper describes the initial ventilation requirements and the implemented ventilation system. The specific fan power, SFP, with maximum air flow rate was measured to be 0.9 kJ/m3 to 1.2 kJ/m3, with an average of 1.1 kJ/m3. The yearly mean SFP based on estimated runtime is
    approx. 0.8 kJ/m3. The case shows the unlocked potential that lies within mechanical ventilation for nearzero energy consuming buildings.
    Original languageEnglish
    Title of host publicationProceedings of the 10th Nordic Symposium on Building Physics
    EditorsJesper Arfvidsson, Lars-Erik Harderup, Anders Kumlin, Bitte Rosencrantz
    Number of pages8
    PublisherLund University
    Publication date2014
    Article number89
    ISBN (Electronic)978-91-88722-53-9
    Publication statusPublished - 2014
    Event10th Nordic Symposium on Building Physics - Lund, Sweden
    Duration: 15 Jun 201419 Jun 2014
    Conference number: 10


    Conference10th Nordic Symposium on Building Physics
    Internet address


    • Mechanical ventilation
    • Low-energy
    • Ventilation
    • Indoor climate
    • Specific fan power


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