Investigates the ventilation efficiency of different ventilation patterns arranged by two inlet and two outlet diffusers at different locations. First performs a numerical simulation, then a laboratory test in a full scale test chamber to validate the results. A concentration decay of carbon dioxide was used to calculate the ventilation efficiency and air change rate for the test chamber. States that the location of diffuser rather than air change rate might dominate the distribution of supply/exhaust air in the study.
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