Volume I - Section II - Animal Room Variations 
Page II - 15 
Figure 2.14 Racks Perpendicular to Side Walls 
• Side Cracks of Cage Sealed Instead of Open: A series of cases was considered in which the 
side cracks of the cage were sealed, leaving the cage filter top as the only transfer mechanism. 
The main objective here was to establish the relative increase in cage NH 3 and CO 2 levels 
when the secondary transfer mechanism is removed. 
• Density of Cages: The number of cages per rack was considered as a parameter. In addition to 
the basecase value of 42 cages per rack, a double density rack was considered (84 cages per 
rack), as was a reduced density rack of 28 cages per rack. See figures 2. 15 and 2. 16. 
