The aim of the study is to propose a prediction method of indoor Formaldehyde concentration based on the emission characteristics in small chambers for a full-scale experimental house. Concentrations of Formaldehyde, temperatures, humidity, ventilation rates and routes, and emission rates from the interior surface were compared with the predicted data. It was found that indoor concentrations calculated with the emission rates using FLEC and the ventilation rates agreed well with the measured results. Indoor concentration was influenced by temperature and ventilation rate, and it decreased gradually by time. The speed of decay was lower than that in small chambers. The predicted indoor concentrations considering the decay speed aereed well with the measured results.
