Analyses of hygrothermal conditions in low-energy houses is important because of their likely sensitivity for excessive moisture. The presented work deals with real-time measurement of temperature and relative humidity at multiple locations inside a low-energy house envelope. The measured data allows diagnosing approaches towards building design and understanding and evaluating the house performance. Suitability and accuracy of numerical computation was analysed. The Finnish mould growth model was used to monitor risk and extent of mould growth under measured and computed conditions. The measured conditions represent more favourable environment to avoid mould growth than the design values recommended by national and international guidelines. There was no mould growth indicated at any monitored points of the envelope. Monitoring the hygrothermal conditions provides valuable information about the performance of structural elements, building material and the house envelope and it helps to predict moisture related risks during the building’s service life.

对低能耗房屋的湿热条件进行分析非常重要，因为它们可能对过多的水分敏感。提出的工作涉及在低能耗房屋围护结构内多个位置的温度和相对湿度的实时测量。测得的数据可用于诊断建筑设计，理解和评估房屋性能的方法。分析了数值计算的适用性和准确性。芬兰霉菌生长模型用于监控在测量和计算条件下霉菌生长的风险和程度。与国家和国际指南所建议的设计值相比，所测量的条件代表了一种更有利的环境，以避免霉菌生长。在包膜的任何监测点均未发现霉菌生长。