Annex 7. How to choose upper-room germicidal ultraviolet light fixtures

The scenarios in this annex are designed to aid in choosing the most appropriate and cost-effective germicidal ultraviolet light features; that is, features using ultraviolet C (UVC) to create an effective upper-room UVC254 system. The effectiveness of the system depends on room shape and dimensions, type of fixtures available and how occupants will use the space. The three examples given demonstrate how these factors can influence final fixture choices for upper-room UVC (1).



Reference for Annex 7

  1. Tuberculosis infection control: a practical manual for preventing TB. San Francisco, CA: Curry International Tuberculosis Center; 2022 (

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