diff --git a/Validation/Memorial_Tunnel/FDS_Input_Files/seq_1_ventilation.txt b/Validation/Memorial_Tunnel/FDS_Input_Files/seq_1_ventilation.txt
index 844afb22688..ea789b87350 100644
--- a/Validation/Memorial_Tunnel/FDS_Input_Files/seq_1_ventilation.txt
+++ b/Validation/Memorial_Tunnel/FDS_Input_Files/seq_1_ventilation.txt
@@ -5,6 +5,18 @@
 &VENT XB= 22, 22.4, 1.6, 2.8,4.4,4.4, SURF_ID='North Vent',  MULT_ID='north_vents' /
 &MULT ID='north_vents', DX=5.2, I_UPPER=155 /
 
-&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents' /
-&MULT ID='south_vents', DX=8.0, I_UPPER=99 /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_1' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_2' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_3' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_4' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_5' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_6' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_7' /
+&MULT ID='south_vents_1', DX=8.0, I_LOWER= 0, I_UPPER=36 /
+&MULT ID='south_vents_2', DX=8.0, I_LOWER=38, I_UPPER=49 /
+&MULT ID='south_vents_3', DX=8.0, I_LOWER=51, I_UPPER=59 /
+&MULT ID='south_vents_4', DX=8.0, I_LOWER=61, I_UPPER=65 /
+&MULT ID='south_vents_5', DX=8.0, I_LOWER=67, I_UPPER=71 /
+&MULT ID='south_vents_6', DX=8.0, I_LOWER=73, I_UPPER=75 /
+&MULT ID='south_vents_7', DX=8.0, I_LOWER=77, I_UPPER=99 /
 
diff --git a/Validation/Memorial_Tunnel/FDS_Input_Files/seq_4_ventilation.txt b/Validation/Memorial_Tunnel/FDS_Input_Files/seq_4_ventilation.txt
index 4836417750d..6156bf370e0 100644
--- a/Validation/Memorial_Tunnel/FDS_Input_Files/seq_4_ventilation.txt
+++ b/Validation/Memorial_Tunnel/FDS_Input_Files/seq_4_ventilation.txt
@@ -2,6 +2,18 @@
 &SURF ID='North Vent', VOLUME_FLOW=-1.0, RAMP_V='RAMP_NORTH', COLOR='BLUE' /
 &SURF ID='South Vent', VOLUME_FLOW=-1.0, RAMP_V='RAMP_SOUTH', COLOR='BLUE' /
 
-&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='vent' /
-&MULT ID='vent', DX=8.0, I_UPPER=99 /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_1' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_2' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_3' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_4' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_5' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_6' /
+&VENT XB= 22, 26.0,-3.6,-3.6,0.2,0.6, SURF_ID='South Vent',  MULT_ID='south_vents_7' /
+&MULT ID='south_vents_1', DX=8.0, I_LOWER= 0, I_UPPER=36 /
+&MULT ID='south_vents_2', DX=8.0, I_LOWER=38, I_UPPER=49 /
+&MULT ID='south_vents_3', DX=8.0, I_LOWER=51, I_UPPER=59 /
+&MULT ID='south_vents_4', DX=8.0, I_LOWER=61, I_UPPER=65 /
+&MULT ID='south_vents_5', DX=8.0, I_LOWER=67, I_UPPER=71 /
+&MULT ID='south_vents_6', DX=8.0, I_LOWER=73, I_UPPER=75 /
+&MULT ID='south_vents_7', DX=8.0, I_LOWER=77, I_UPPER=99 /