The reduction of the energy demand of existing buildings is the main objective of building refurbishment. Managing the heat radiation properties of the wall construction is a possible way to develop highly effective and resource efficient insulation materials and concepts. The application of infrared reflective wall paints and coatings has been studied since the latter half of the 20th century. A brief review of the literature gives an account of the current research status. One has to realise that the conclusions are not uniformly consistent but depend strongly on the specific boundary conditions and investigated parameters. The study presented here discusses the usage of infrared reflective wall paint in conjunction with heat insulation for historic brick masonry. The possible energy savings are linked to the resulting thermal comfort. We identify critical parameters that must be taken into account when using infrared reflective wall paint and derive recommended design rules for the refurbishment of such building types. The findings prove that infrared reflective wall paint can decrease heat losses by 18% and up to 22% if comfort conditions are considered. Increasing energy savings can also cause the negative effect of high radiative asymmetry. Thus, each configuration must be observed in detail.

减少现有建筑物的能源需求是建筑物翻新的主要目标。管理墙壁结构的散热特性是开发高效和资源有效的隔热材料和概念的一种可能方法。自20世纪下半叶以来，一直在研究红外反射墙漆和涂料的应用。简要回顾一下文献即可了解当前的研究状况。人们必须认识到结论并非统一一致，而是在很大程度上取决于特定的边界条件和所研究的参数。此处进行的研究讨论了红外反射墙漆与隔热砖结合使用的历史性砖石建筑。可能的节能与最终的热舒适度有关。我们确定了使用红外反射墙面涂料时必须考虑的关键参数，并得出了翻新此类建筑的推荐设计规则。研究结果证明，如果考虑舒适条件，红外反射墙面涂料可以减少18％的热量损失，最高可减少22％。节省更多的能源还可能导致高辐射不对称的负面影响。因此，必须仔细观察每个配置。节省更多的能源还可能导致高辐射不对称的负面影响。因此，必须仔细观察每个配置。节省更多的能源还可能导致高辐射不对称的负面影响。因此，必须仔细观察每个配置。