Volume I - Section III - Evaluation of Results and Recommendations 
Page III - 43 
Figure 3.59 Room Breathing Zone NH 3 Concentration vs. Supply Relative Humidity 
Cases 99 to 101 were run with a supply temperature of 22.2 °C (72.0 °F). Case 99 was the same 
as the basecase (radial supply ceiling exhaust), case 100 was the same as case 3 (radial supply 
low level exhaust) and case 101 was the same as case 66 (low induction supply, low level 
exhaust, 5 ACH). These cases were run to investigate the effect of increased temperatures in the 
room, in particular the reduction of relative humidity and NH3 generation that should result. 
Raising the supply temperature for these cases produces an increase in both room and cage 
temperature as shown in table 3.02 
Table 3.02 Comparison of Temperatures °C (°F) 
Case 01 
Case 99 
Case 03 
Case 100 
Case 66 
Case 101 
Room BZ 
20.3 (68.5) 
23.9 (75.0) 
22.7 (72.9) 
24.8 (76.6) 
18.6 (65.5) 
26.2 (79.2) 
Cage Mean 
22.1 (71.8) 
24.8 (76.6) 
23.4 (74.1) 
25.4 (77.7) 
20.6 (69.1) 
26.8 (80.2) 
Cage Max 
23.0 (73.4) 
25.7 (78.3) 
24.6 (76.3) 
26.8 (80.2) 
21.9 (71.4) 
28.3 (82.9) 
Cases 99 and 100 represent an increase of 3.2 °C (5.8 °F) in the supply temperature and produce 
an increase of around 2.5 °C (4.5 °F) in both room and cage temperature. Case 101 represents an 
increase of 15.4 °C (27.7 °F) in the supply temperature. This raises the room and cage 
temperature by nearly 8.0 °C (14.4 °F). The maximum temperature in a cage is increased to 
around 28.0 °C (82.4 °F). Although it is high, is still likely to be more than acceptable to the 
mice. 
Case 99 produces an improvement in NH 3 concentration in the room of nearly 50 percent and 
nearly 30 percent in the cage. 
