NZGUV® UR-140 Upper Room UV-C 253.7 nm disinfecting light. EPA registered, safety tested and listed by UL. This BAA Compliant, made in America germicidal UV lighting product kills airborne pathogens by using UV-C energy to deactivate viruses and bacteria through natural convection in enclosed spaces. Upper-room UVGI operates 24/7/365 and is maintenance free. Upper-room (UVGI) is recommended by CDC as a part of a layered strategy to reduce exposures to the virus that causes Covid–19.