由于室内表面发生的水分交换，房间的湿度和建筑围护结构中材料的水分条件在很大程度上相互依赖。这些湿度影响还强烈依赖于室内空间的热条件和建筑物的围护结构。而湿度又对建筑物的运行状况产生了重大影响。在炎热潮湿的气候条件下，可能需要保持较低的通风率，以避免室内湿度过高，而在寒冷的气候条件下，可以使用通风将湿度保持在足够低的水平，以确保建筑围护结构中的湿度损坏风险很小。 无论是哪种情况，室内湿度都会直接或间接影响建筑物HVAC系统的能量性能。为了分析这种情况，今天有可能从整体建筑湿热性能的综合计算分析中受益。这样的发展导致了整个建筑（室内气候、外壳和系统）的模型，这些模型不仅可以预测热性能，比如在当代建筑能源模拟中。越来越多的建筑能耗模拟工具增加了瞬态水分迁移模型。 本文给出了两个此类最新发展的例子，并将重点介绍可以获得的一些计算结果。最后，本文将提到近期的一些进一步发展和国际合作，并介绍一个通用数值试验案例的建议。单位:SICitation:Symposium，ASHRAE交易，第110卷，pt。2.

The humidity of rooms and the moisture conditions of materials in the enclosure of buildings depend much on each other because of the moisture exchange that takes place over the interior surfaces. These moisture influences also depend strongly on the thermal conditions of indoor spaces and enclosure elements of buildings. In turn, the moisture and humidity conditions have significant impact on how buildings are operated. In hot, humid climates, it may be desirable to keep the ventilation rates low in order to avoid too high indoor humidity, while in cold climates, ventilation can be used to keep the humidity low enough to ensure only a small risk of moisture damage in the building enclosure. In either case, the indoor humidity has a direct or indirect impact on the energy performance of the HVAC system of a building. To analyze this situation, it is today possible to benefit from some recent developments in integrated computational analysis of the hygrothermal performance of whole buildings. Such developments have led to models for whole buildings (the indoor climate, the enclosure, and the systems), which not only predict the thermal performance, such as in contemporary building energy simulation. A growing number of building energy simulation tools have added models for transient moisture migration. The paper gives examples of two such recent developments and will highlight some calculation results that can be obtained. Finally, the paper will mention some further developments and international collaboration for the near future, introducing a proposal recommendation for a common numerical test case.Units: SI