diff --git a/Source/dump.f90 b/Source/dump.f90
index b864ef80931..71e25a7147c 100644
--- a/Source/dump.f90
+++ b/Source/dump.f90
@@ -2343,6 +2343,10 @@ SUBROUTINE WRITE_SMOKEVIEW_FILE
          ENDIF
       ENDIF
 
+      ! Render GEOM vents using SURF properties (that is, do not draw GEOM vents in Smokeview)
+
+      IF (VT%GEOM) VT%TYPE_INDICATOR = -2
+
    ENDDO VENT_LOOP
 
    ! Look for interpolated mesh boundaries and ensure that Smokeview leaves these blank (VENT_INDICES=-1).
diff --git a/Source/read.f90 b/Source/read.f90
index 254c8b784b3..cb70a70e639 100644
--- a/Source/read.f90
+++ b/Source/read.f90
@@ -11818,7 +11818,7 @@ SUBROUTINE READ_VENT
 INTEGER :: N,N_TOTAL,NM,NNN,IOR,I1,I2,J1,J2,K1,K2,RGB(3),N_EDDY,II,JJ,KK,OBST_INDEX,N_EXPLICIT,N_IMPLICIT_VENTS,I_MODE,&
            N_ORIGINAL_VENTS,IC0,IC1,IC
 REAL(EB) :: SPREAD_RATE,TRANSPARENCY,XYZ(3),TMP_EXTERIOR,DYNAMIC_PRESSURE,XB_USER(6),XB_MESH(6), &
-            REYNOLDS_STRESS(3,3),L_EDDY,VEL,VEL_RMS,L_EDDY_IJ(3,3),UVW(3),RADIUS
+            REYNOLDS_STRESS(3,3),L_EDDY,VEL_RMS,L_EDDY_IJ(3,3),UVW(3),RADIUS
 CHARACTER(LABEL_LENGTH) :: ID,DEVC_ID,CTRL_ID,SURF_ID,PRESSURE_RAMP,TMP_EXTERIOR_RAMP,MULT_ID,OBST_ID
 CHARACTER(25) :: COLOR
 TYPE(MULTIPLIER_TYPE), POINTER :: MR
@@ -11969,12 +11969,12 @@ SUBROUTINE READ_VENT
 
       ! Check that the vent is properly specified
 
-      IF (ABS(XB(3)-XB(4))<=SPACING(XB(4))  .AND. TWO_D .AND. N_TOTAL>N_IMPLICIT_VENTS) THEN
+      IF (ABS(XB(3)-XB(4))<=SPACING(XB(4)) .AND. TWO_D .AND. N_TOTAL>N_IMPLICIT_VENTS) THEN
          WRITE(MESSAGE,'(3A)') 'ERROR(809): VENT ',TRIM(ID),' cannot be specified on a y boundary in a 2D calc.'
          CALL SHUTDOWN(MESSAGE,PROCESS_0_ONLY=.FALSE.) ; RETURN
       ENDIF
 
-      IF (ABS(XB(1)-XB(2))>SPACING(XB(2))  .AND. ABS(XB(3)-XB(4))>SPACING(XB(4)).AND.ABS(XB(5)-XB(6))>SPACING(XB(6)) ) THEN
+      IF (ABS(XB(1)-XB(2))>SPACING(XB(2)).AND.ABS(XB(3)-XB(4))>SPACING(XB(4)).AND.ABS(XB(5)-XB(6))>SPACING(XB(6))) THEN
          WRITE(MESSAGE,'(3A)')  'ERROR(810): VENT ',TRIM(ID),' must be a plane.'
          CALL SHUTDOWN(MESSAGE,PROCESS_0_ONLY=.FALSE.) ; RETURN
       ENDIF
@@ -12112,6 +12112,10 @@ SUBROUTINE READ_VENT
                   IF (BLOCKED) REJECT_VENT = .TRUE.
                ENDIF
 
+               ! If the VENT is on a GEOM do not reject (further setup in READ_GEOM)
+
+               IF (GEOM) REJECT_VENT = .FALSE.
+
                ! If the VENT is rejected, cycle
 
                IF (REJECT_VENT) THEN
@@ -12413,7 +12417,7 @@ SUBROUTINE READ_VENT
          ENDDO
       ENDIF
 
-      IF (VT%IOR==0) THEN
+      IF (VT%IOR==0 .AND. .NOT.VT%GEOM) THEN
          WRITE(MESSAGE,'(3A)')  'ERROR(818): VENT ',TRIM(VT%ID),' requires an orientation index, IOR.'
          CALL SHUTDOWN(MESSAGE,PROCESS_0_ONLY=.FALSE.) ; RETURN
       ENDIF
@@ -12461,7 +12465,7 @@ SUBROUTINE READ_VENT
 
       ! Check UVW
 
-      IF (ABS(VT%UVW(ABS(VT%IOR))) < TWO_EPSILON_EB) THEN
+      IF (ABS(VT%UVW(ABS(VT%IOR))) < TWO_EPSILON_EB .AND. .NOT.VT%GEOM) THEN
          WRITE(MESSAGE,'(3A)')  'ERROR(821): VENT ',TRIM(VT%ID),' cannot have normal component of UVW equal to 0.'
          CALL SHUTDOWN(MESSAGE,PROCESS_0_ONLY=.FALSE.) ; RETURN
       ENDIF
@@ -12560,7 +12564,6 @@ SUBROUTINE SET_VENT_DEFAULTS
 TMP_EXTERIOR_RAMP = 'null'
 TRANSPARENCY      = 1._EB
 UVW               = -1.E12_EB
-VEL               = -1.E12_EB ! experimental (rjm)
 VEL_RMS           = 0._EB
 XYZ               = -1.E6_EB