Research questionnaire on the usage of housing equipment focusing on ventilation system of apartment houses

Research questionnaire was carried on the usage of housing equipment focusing on the continuous ventilation system in apartmenthouses. It was confirmed that ventilation systems are operated 24 hours more than 80% of the respondents, and the operating ratio increases as the household number increasing.On the other hand, the ratio of opening outdoor air inlets for ventilation system was as low as about 50%. Cross correlation analysis showed that the operation of continuous ventilation system is effective in suppressing dew condensation, mold and bad smell, and the majority of respondents evaluate the ventilation system satisfactorily. Separate analysis by age revealed that aged households are very sensitive on utilities expense and tend to apply local heating of a room and bathing is not frequent.