Effectiveness of passive ventilation functions of 'Breathing Wall' under natural weather conditions.

A scale mock-up house installed with a "Breathing Wall" was constructed outdoors in order to consider the practical application of breathing walls in houses in temperate-climate regions. It was found that, under outdoor weather conditions, the Breathing Wall provides the necessary amount of ventilation, thermal insulation and moisture transmission required for application in a temperate climate region. No adverse effects on the indoor environment were found even when cold outdoor air flowed through the Breathing Wall.