Effect of solar shielding and thermal insulation for comfortable energy-efficient residential building in mild climate

In this study, we conducted a field measurement in a highly airtight and highly insulated house in a mild climate in Japan. By installing solar shielding on windows, the temperature of the interior window surface decrease, and create longer time lag. In addition, heat flux from the window surface was decrease, that of the other parts was increased. The CFD analysis showed that the heat flux from the attic could be reduced by increasing roof insulation and ventilation through the eaves.