Partial insulation retrofitting is an effective method for improving thermal insulation in existing houses as its construction cost is lower than that of total insulation retrofitting. This study aimed to clarify the actual conditions of the thermal environment in partially insulated retrofitted houses in summer and winter. Furthermore, the size of insulated areas and heating methods were examined from perspective of energy consumption and health. Field surveys on indoor environments were conducted in an actual partially insulated retrofitted house in Chiba prefecture. Subsequently, we show the effects of different insulation areas and heating methods on energy consumption and health.
