ABSTRACT Minimum airflow rates are either recommended or required based on the number of occupants, the intended use of the space or the floor plan area. This paper focuses on a new proposal for Spanish Technical Building Code based on limitations of the ventilation using the CO2 concentration as an indicator. The aim of the proposal is to introduce indoor air quality criteria in order to determine the design ventilation rates, and as a result, reduce the ventilation energy losses. Based on this proposal, the perceived indoor air quality in terms of the concentration of CO2 and other contaminants of concern is analysed through simulation. Maximum allowed area-based emission rates are defined for the indoor source contaminants. It was found that the minimum outdoor airflow rates based on maximum allowable CO2 concentrations would reduce heating demand by more than 25% when compared to the reference airflow rates. In addition, the influence of the airtightness of the envelope on the indoor air quality is analysed with regards to defining the corresponding maximum allowed area-based emission rates. As the envelope permeability increases, the maximum allowed area-based emission rates decrease for HCHO and total volatile organic compound, and should be around 27% lower comparing to the design case values.

中文翻译：

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基于二氧化碳浓度标准的通风要求：对室内空气质量和能源使用的影响

摘要 根据居住人数、空间的预期用途或平面图面积，建议或要求最低气流速率。本文重点介绍西班牙技术建筑规范的新提案，该提案基于使用 CO2 浓度作为指标的通风限制。该提案的目的是引入室内空气质量标准，以确定设计通风率，从而减少通风能量损失。基于此建议，通过模拟分析了感知的室内空气质量，如二氧化碳和其他相关污染物的浓度。为室内源污染物定义了基于区域的最大允许排放率。结果表明，与参考气流速率相比，基于最大允许 CO2 浓度的最小室外气流速率将使供暖需求减少 25% 以上。此外，分析了围护结构的气密性对室内空气质量的影响，确定了相应的最大允许面积排放率。随着外壳渗透率的增加，HCHO 和总挥发性有机化合物的最大允许基于面积的排放率会降低，并且与设计案例值相比应该低 27% 左右。