A study on characteristics and residents' recognition of ERV system in apartment houses through IPA analysis

This study investigates residents' recognition of ERV system in apartment houses and compares their recognition. It examines whether the residents, living in apartment houses where ERV system is installed in Daegu, use the system or not and their recognition. The current usage of the system and its problem is drawn by a comparative analysis on residents' recognition. This study is conducted with a view to providing it as basic data for the future study of ERV system's optimal control. Research method uses a questionnaire survey that collects data. After collecting data, recognition of the residents using ERV system and nonusers is classified into importance and satisfaction in order to analyze them. As a result of the analysis, it shows that both the system users and non-users answer that ventilation is important in housing. However, the residents using ERV system are much more satisfied than the resident who do not use the system in the sector of the Indoor Air Quality and Heating and Cooling Energy savings It implies that the use of ERV system has a positive effect on improvement of the indoor comfort. However, ERV system is currently operated by the residents' subjective judgement. That strains ventilation easiness, maintenance and administration cost saving. Therefore, it comes to the conclusion that objective indicator should be suggested to utilize ERV system more efficiently.