Reliable indoor air disinfection could make clinical and other necessary indoor spaces safer during epidemics with airborne transmission like COVID-19. Low-dose upper-room germicidal ultraviolet-C (GUV 254 nm) is well-suited for this because of the SARS-CoV-2 virus' sensitivity to GUV inactivation and GUV's relatively easy adaptability to many types of indoor spaces without respect to outside weather conditions. However, most existing upper-room GUV fixtures are relatively expensive and inefficient at creating an upper-room disinfection zone due to loss of disinfecting UV-C photons caused by the casing and louvers designed to protect persons in the occupied space. Presented herein are two moderate-size restaurant spaces, 900 ft2 (25.5 m3 ) and 630 ft2 (17.8 m3 ) respectively, in which low-cost bare-bulb GUV fixtures, without exterior casing, were installed with upward-pulling ceiling fans to provide upper-room disinfection and lower-room safety. Proper safety-tested installations like these are adaptable to hospital Emergency Department waiting rooms, clinics, nursing home and prison common areas, public libraries, schools, and restaurants.

中文翻译：

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针对 COVID-19 的裸球上层房间杀菌紫外线-C (GUV) 室内空气消毒†

在 COVID-19 等空气传播的流行病期间，可靠的室内空气消毒可以使临床和其他必要的室内空间更安全。由于 SARS-CoV-2 病毒对 GUV 灭活的敏感性以及 GUV 相对容易适应多种类型的室内空间，而无需考虑室外，因此低剂量的上层室内杀菌紫外线 C（GUV 254 nm）非常适合这种情况天气状况。然而，大多数现有的上层房间 GUV 固定装置相对昂贵且在创建上层房间消毒区时效率低下，这是因为外壳和百叶窗会造成消毒 UV-C 光子的损失，这些外壳和百叶窗旨在保护占用空间中的人员。这里介绍的是两个中等大小的餐厅空间，分别为 900 平方英尺（25.5 立方米）和 630 平方英尺（17.8 立方米），其中低成本的裸灯泡 GUV 固定装置，没有外壳，安装了上拉式吊扇，以提供上层房间的消毒和下层房间的安全。此类经过适当安全测试的装置适用于医院急诊室候诊室、诊所、疗养院和监狱公共区域、公共图书馆、学校和餐馆。