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Ventilation Design Handbook on Animal Research Facilities Using Static Microisolators 
Figure 3.15 Comparison of Mean Cage Relative Humidity (percent) 
Figure 3.16 Comparison of Mean Breathing Zone Relative Humidity (percent) 
Lower humidities in the low level exhaust cases are mainly due to the higher temperatures. 
Two features are quickly apparent from these cases: 
® low level exhausts produce higher temperatures in the room and cages; and 
• low level exhausts produce the best in-cage ventilation (lowest CCL concentrations). 
