The impact of electric overhead radiant heating on the indoor environment of historic churches |
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| Authors: | Lucyna Samek Anna De Maeyer-Worobiec Zoya Spolnik Lszl Bencs Velichka Kontozova &#x;ukasz Bratasz Roman Koz&#x;owski Ren Van Grieken |
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| Institution: | aDepartment of Physics and Applied Computer Science, AGH – University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland;bDepartment of Chemistry, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium;cInstitute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland |
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| Abstract: | The impact of electric overhead radiant heaters on the microclimate, air flows, transport and deposition of suspended particulate matter (SPM) was monitored between March 2004 and March 2005 in the historic churches of Saint Michael Archangel in Szalowa and Saint Catherine in Cracow (Poland). The measurements show that although irradiation at the floor level increases temperature and reduces relative humidity in the interior of the church, the effect out of the heated zone and for the surfaces sheltered from irradiation is very limited, i.e. their extent is comparable with natural fluctuations inherent to the local climate of the church. The radiant heaters proved to generate little convectional flow of the air. Therefore, the heating system was not found to increase the concentration of SPM indoors; in particular, no re-suspension of particles already present in the church was observed. This work has demonstrated that the overhead radiant heaters are capable of providing localised heat to the areas where people congregate without adversely affecting painted walls and the works of arts displayed in churches. Care, however, should be taken that sensitive works of art are not exposed to the direct infrared radiation. |
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| Keywords: | Heating of churches Radiant heaters Microclimate Air flows Suspended particulate matter Indoor and outdoor air Particle transport and deposition |
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