Prediction of exhaust gas stagnation in common corridor of apartments with gas water heater

Gas water heaters are usually installed in common hallways of Japanese apartments. When the exhaust gas remains in the common hallway, there is a possibility that will leak into the living room through the air supply opening for ventilation. This can harm the health of the resident. In order to understand this problem, experiments were conducted using a full-scale common hallways model, and an analysis was performed using CFD(computational fluid dynamics). It is difficult to predict the diffusion of the exhaust gas injected at 15- °. Therefore, we propose a visualization measurement of exhaust gas. The CFD result shows a good agreement with the retention state of the common hallways where the gas water heater is installed. The installable position of the gas water heater was explained by a case study.