The most significant factors of indoor air quality – besides temperature and humidity – are the concentrations of carbon-dioxide (CO2) and radon (222Rn). Radon seepage is caused by and affected by the materials used in walls and floors, the quality of insulation, cracks and even the amount of pipes running through the walls. The amount of CO2 is predominantly affected by the biological processes of the inhabitants, and possibly by potentially faulty HVAC systems. The energy efficiency related upgrades to family homes, which often only extend to window replacements and better insulation have a significant effect and could potentially increase concentrations of both radon and CO2 which has a significant effect on the well-being of the inhabitants. Our tests conducted in Hungary have proven that by using automated heat recovery ventilation (HRV) both energy efficient operation and low concentrations of radon and CO2 are achievable. Our results prove the significance and prevalence of the issue of higher concentrations of these pollutants, and offer a viable solution.

中文翻译：

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没有热回收通风的节能家庭住宅中氡和二氧化碳的高浓度

除了温度和湿度之外，影响室内空气质量的最重要因素是二氧化碳 (CO2) 和氡 (222Rn) 的浓度。氡渗漏是由墙壁和地板所使用的材料、绝缘质量、裂缝甚至穿过墙壁的管道数量引起并受其影响。CO2 的量主要受居民生物过程的影响，也可能受潜在的 HVAC 系统故障的影响。与家庭住宅的能源效率相关的升级，通常仅扩展到更换窗户和更好的绝缘具有显着影响，并且可能会增加氡和二氧化碳的浓度，这对居民的福祉有显着影响。我们在匈牙利进行的测试证明，通过使用自动热回收通风 (HRV)，可以实现节能运行和低浓度氡气和二氧化碳。我们的结果证明了这些污染物浓度较高问题的重要性和普遍性，并提供了可行的解决方案。