Thermal comfort and ventilation performance of retrofitted apartment houses

The primary purpose of the present study was toevaluate the effects of retrofitting of windowsashes by measuring air tightness performanceand thermal environment of apartment housesbuilt during the period 1965 - 1974 before andafter the retrofitting of window sashes. Also,ventilation rate in each zone and air tightness onroom fittings were determined in multi-zonetype dwelling units, and evaluation was madeon ventilating sinlulation between multi-zonedwelling units. From the results of actualmeasurement, it was found that room fittingsmade of aluminum had relatively high airtightness performance even before theretrofitting, and that ELA (Effective LeakageArea) decreased in all dwelling units by about30% in these dwelling units. Before retrofittingunder natural ventilation, the influence ofoutdoor wind was observed in ventilation rate ofeach zone, depending on the arrangement ofzones. After retrofitting, almost no expectationcan be put on ventilation rate of each zone, butit was confirmed that a constant ventilation ratecould be maintained by introducing mechanicalventilation equipments. By the retrofitting ofwindow sashes, variations in depth direction offloor surface temperature could be improved.