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首页> 外文会议>Annual conference of the International Society of Exposure Science >The IVAIRE Project - Ventilation Characteristics of Single Family Homes of Asthmatic Children Followed in an Asthma Clinic
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The IVAIRE Project - Ventilation Characteristics of Single Family Homes of Asthmatic Children Followed in an Asthma Clinic

机译：IVAIRE项目-哮喘诊所中有哮喘儿童的独户住宅的通风特性

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Background and Aims The IVAIRE study evaluated the impact of improved residential ventilation on IAQ and the frequency of asthma symptoms in children. This paper describes the pre-intervention phase of this study where the ventilation characteristics of the single family homes were analyzed in order to select the homes participating in the ventilation intervention. Methods Between October 2008 and June 2010, 111 children were selected and their homes were visited three times by trained technicians during the heating-season (fall and winter) and summer. During these visits the ventilation rates were measured and the mechanical ventilation system (MVS) and their use were characterized. The measured ventilation parameters were the air changes per hour (ACH) measured with PFT gas, the building airtightness (ACH50) with a blower door, CO2, and relative humidity (RH). Ventilation parameters were compared according to the presence/absence and the type of MVS. Results A MVS was present in 73 of the 111 homes, of which 44 were heat recovery ventilators (HRV) and 29 had mixing boxes. There was no difference in ACH between the homes with (0.22) or without (0.20) a MVS (p=0.53). However, the ACH50 was lower in the homes with a MVS than without (3.1 vs. 4.8, p=＜0.0001) as well as RH (37.6 vs. 42.3%, p=0.0009). Moreover the homes with an HRV had a higher ACH (0.25 vs. 0.18, p=0.003) and a lower RH (35.8 vs. 40.4%, p=0.002) than the homes with a mixing box. Conclusions Even though in the homes with a MVS an HRV seems to be more effective than a mixing box, the ACH remained lower than the ASHRAE recommended guideline of 0.35 h-1. This indicates that the presence of a MVS alone may not guarantee adequate ventilation. Factors such as the capacity of the ventilation unit, proper installation and utilization by occupants need to be investigated to design specific corrective interventions tailored to each home.
机译：背景和目的IVAIRE研究评估了改善居住环境通风对IAQ的影响以及儿童哮喘症状的发生频率。本文介绍了这项研究的干预前阶段，其中分析了单户住宅的通风特性，以选择参与通风干预的房屋。方法在2008年10月至2010年6月期间，选择了111名儿童，并在受热季节（秋季和冬季）和夏季，由训练有素的技术人员对他们的房屋进行了3次探访。在这些访问期间，测量了通风速率，并对机械通风系统（MVS）及其用途进行了表征。测得的通风参数是使用PFT气体测得的每小时空气变化量（ACH），带有鼓风机门的建筑物气密性（ACH50），CO2和相对湿度（RH）。根据MVS的存在与否和类型比较通风参数。结果111户家庭中有73户存在MVS，其中44台是热回收呼吸机（HRV），29台有混合箱。在MVS为（0.22）或没有MVS（0.20）的家庭之间，ACH差异无统计学意义（p = 0.53）。然而，在有MVS的家庭中，ACH50比没有家庭和RH的家庭低（3.1 vs. 4.8，p = ＜0.0001）和RH（37.6 vs. 42.3％，p = 0.0009）。此外，具有HRV的房屋比带有混合箱的房屋具有更高的ACH（0.25 vs. 0.18，p = 0.003）和较低的RH（35.8 vs. 40.4％，p = 0.002）。结论即使在具有MVS的家庭中，HRV似乎比搅拌盒更有效，但ACH仍然低于ASHRAE建议的0.35 h-1指导原则。这表明单独使用MVS可能无法保证足够的通风。需要研究通风单元的容量，乘员的正确安装和使用等因素，以设计针对每个房屋的特定纠正措施。

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