Despite recognition for significantly improving airflow and heat-transfer efficiency and lowering costs associated with HVACR systems, ultraviolet (UV) light in the 253.7-nm germicidal C-band wavelength (UV-C) is widely misunderstood and, thus, underutilized. This article attempts to set the record straight and improve understanding of how UV-C lamps operate. UV-C is new technology: Fiction Though it may seem futuristic—something about that crisp blue light screams science ...

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