Environmental Factors Causing Occupants' Window Opening in Multi-family Residential Buildings

摘要

The Korean building code requires to meet 0.5 ACH ventilation to improve indoor air quality in residential buildings since 2013,thereafter mechanical ventilation system has come into wide use in most of newly constructed residential buildings.However mechanical ventilation system was not preferable for occupants due to energy concern.Thus analyzing occupant controlled ventilation would build better ventilation design which satisfies both occupants' satisfaction and energy reduction.To evaluate factors causing occupants to ventilate,this study conducted measurement and questionnaire surveys targeting residential building occupants.Indoor air temperature,humidity,CO2,particle mass and concentration for indoor environment and air temperature and humidity for outdoor environments were measured from 21st of February to 16th of May 2014 when outdoor temperature changes sharply.As a result of analysis,outdoor air temperature and indoor CO2 concentration were the most influential factors causing occupants' window opening.Further study would help to build a model predicting occupants' window opening.