Volume I - Section HI - Evaluation of Results and Recommendations 
Page M - 13 
Figure 3.13 Comparison of Mean Cage NH 3 Concentration (ppm) 
Figure 3.14 Comparison of Room Breathing Zone NH 3 Concentration (ppm) 
The cage NH3 concentrations show a similar pattern to the CO2 concentrations. The variations 
are, however, somewhat larger as the higher temperatures in the low level exhaust cases reduce 
the relative humidity in the cages and reduce the rate of NH3 generation, which leads to lower 
conentrations. 
