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Vemtiiation Design Handbook on Animal Research Facilities Using Static Microisolators 
Figure 3.51 Comparison of Mean Cage Relative Humidity ( percent ) 
Although the ventilation of the cages is much worse, which leads to the high concentrations, the 
temperatures within the cages are not noticeably different. This is partly to be expected, as the 
CFD model of the mice is a constant temperature model. Even if there was no ventilation of the 
cages, the temperature in the cage cannot exceed the 30.0 °C (86.0 °F), which is the surface 
temperature of the mice. 
3.1.8 Room Width 
Cases 76 to 78 were run with an increased room width 4.26m (14’ 0”) instead of the original 
width of 3.66m (12’ 0”), with ceiling exhausts for the three supply types. They should be 
compared with cases 1, 4 and 7. Figures 3.52 to 3.55 show comparisons of CO 2 and NH 3 
concentrations. 
