The present invention provides a method and apparatus for controlling a concentration of descenting particles within a temporary structure. The temporary structure comprises a plurality of sidewalls and a roof interconnecting the sidewalls. A plurality of selectively openable and closeable upper windows and lower vents are disposed in the sidewalls. The lower vents are disposed at a location below the upper windows. An ozone generator is disposed within and coupled to the temporary structure to produce descenting particles that are controlled within a hunting zone of the temporary structure to be between about 0.04 and 0.1 ppm.