Abstract
The information in this document is useful for HVAC professionals, facility engineers and specialists like employers and building owners and administrators seeking basic knowledge about ultraviolet germicidal irradiation (UVGI) technology. This article explains the specific terms used in the UV field, reasons why UVGI is used for virus inactivation and the main features of UV-C lamps. UVGI device typology is presented, and some general rules and limitations for safe usage are provided. Given the complexity of the UV transmission physics, specific software is needed for sizing UV systems. The sizing guidelines and design examples for different UV-C devices are not included in this document. This annexe scope is general and not limited to any specific building category (e.g., office buildings, educational buildings, shopping areas, sports premises, hospitals, healthcare settings, even residences). However, considering the negative effects on human health and some materials that UV-C radiation could generate when the design is defective, the most important rule is to use only certified products that are properly sized and tested.
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