Abstract: A UV air disinfection system customizable for various different types of target pathogens by controlling the duration and intensity of UV exposure. A controller using table lookup adjusts the duration and intensity for a particular air sample at wavelengths proven to deactivate the target pathogen(s). An ambient air sample is brought into a chamber of known volume, and the air is exposed to UV radiation for a duration and intensity specified by a lookup table for the target pathogen(s). This air is then expelled into the room, and another sample is taken. This cyclic operation guarantees a predetermined deactivation percentage of the target pathogen in the expelled air. The process is repeated over and over at a rate designed to disinfect a room in a chosen time.