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Highlights: [•] Open stores have to match an important thermal load due to the infiltration air. [•] This situation is harder with intense pedestrian traffic and in warm humid climates. [•] Climatic separation and advanced hygrothermal control systems enables energy savings. [•] Modern air curtains can keep suitable indoor air temperature and humidity conditions. [•] Energy savings in commercial buildings with these systems exceeds 30%. [ABSTRACT FROM AUTHOR]

This work focuses on studying concentration distribution of 222 Rn radioisotope in a granite processing plant. Using Computational Fluid Dynamic Techniques (CFD), the exposure of the workers to radiation was assessed and, in order to minimise this exposure, different decontamination scenarios using ventilation were analysed. Natural ventilation showed not sufficient to maintain radon concentration below acceptable limits, so a forced ventilation was used instead. Position of the granite blocks also revealed as a determining factor in the radioactive level distribution. Thus, a correct layout of the stored material and an adequate ventilation system can guarantee free of exposure to radiation zones within the studied workshop. This leads to a drastic fall in the exposure of the workers and consequently minimises their risk of developing aggressive illness like lung cancer. [ABSTRACT FROM AUTHOR]