澳大利亚住宅普遍存在潮湿和通风不足的问题，这与不当的建筑设计密切相关。[1]悉尼大学室内环保实验室副教授Arianna Brambilla指出，"澳大利亚住宅是为了散热而不是为了湿度管理而设计的"[1]，这导致室内环境长期处于潮湿状态，对居民健康构成严重威胁。
持续的室内潮湿环境会引发多种健康问题。当室内相对湿度超过70%时，尘螨大量繁殖，霉菌可能导致真菌感染风险。[1]约五分之一的澳大利亚人患有过敏症，其中包括大多数哮喘患者，霉菌是最常见的触发因素。[1]此外，霉菌暴露与成人和儿童的抑郁症、焦虑和压力存在一致关联，对心理健康造成负面影响。[1]Sheryl Van Nunen表示，"霉菌在我们的鼻子、鼻窦和肺部起刺激作用。霉菌为世界上最常见的过敏原——尘螨提供食物"。[1]
专家建议将室内相对湿度控制在40-60%的范围内，这是基于世界卫生组织的指导标准。[1]值得注意的是，日常居家活动如室内洗衣也会加剧潮湿问题，单次洗衣可释放约2升水蒸气。[1]
Australian residential properties are plagued by persistent moisture and inadequate ventilation due to design flaws, creating an environment that poses serious health consequences for occupants.[1] According to Arianna Brambilla, an associate professor at the University of Sydney's indoor environmental health laboratory, prolonged exposure to damp indoor conditions triggers asthma, respiratory diseases, dust mite allergies, and mental health complications.[1]
The health effects intensify when indoor relative humidity exceeds 70%, at which point dust mites proliferate rapidly and mold can develop, increasing the risk of fungal infections.[1] Approximately one-fifth of Australians suffer from allergies, with mold identified as the most common trigger among asthma patients.[1] Beyond respiratory impacts, mold exposure shows a consistent association with depression, anxiety, and stress in both adults and children.[1]
The World Health Organization recommends maintaining indoor relative humidity between 40 and 60 percent.[1] Brambilla explains that "Australian homes are designed for heat dissipation rather than humidity management,"[1] a structural characteristic that exacerbates the problem. Everyday household activities worsen conditions: a single indoor laundry load releases approximately two liters of water vapor.[1] Sheryl Van Nunen notes that "mold irritates our nose, sinuses and lungs. Mold feeds dust mites, the world's most common allergen."[1]