diff --git a/Source/wall.f90 b/Source/wall.f90
index 6703f336ca..80eaa1fe84 100644
--- a/Source/wall.f90
+++ b/Source/wall.f90
@@ -570,9 +570,13 @@ SUBROUTINE SURFACE_HEAT_TRANSFER(NM,T,SF,BC,B1,WALL_INDEX,CFACE_INDEX,PARTICLE_I
 
       ! Avoid large fluxes at open downwind boundaries
 
-      IF (OPEN_WIND_BOUNDARY .AND. DOT_PRODUCT(BC%NVEC,(/U_WIND(BC%KK),V_WIND(BC%KK),W_WIND(BC%KK)/))<-TWO_EPSILON_EB) THEN
-         B1%TMP_F = B1%TMP_G
-         B1%ZZ_F(1:N_TRACKED_SPECIES) = B1%ZZ_G(1:N_TRACKED_SPECIES)
+      WC => WALL(WALL_INDEX)
+      ! INTERPOLATED_BOUNDARY and PERIODIC_BOUNDARY possible with PERIODIC FLOW ONLY vent
+      IF (WC%BOUNDARY_TYPE/=INTERPOLATED_BOUNDARY .AND. WC%BOUNDARY_TYPE/=PERIODIC_BOUNDARY) THEN
+         IF (OPEN_WIND_BOUNDARY .AND. DOT_PRODUCT(BC%NVEC,(/U_WIND(BC%KK),V_WIND(BC%KK),W_WIND(BC%KK)/))<-TWO_EPSILON_EB) THEN
+            B1%TMP_F = B1%TMP_G
+            B1%ZZ_F(1:N_TRACKED_SPECIES) = B1%ZZ_G(1:N_TRACKED_SPECIES)
+         ENDIF
       ENDIF
 
       ! Ghost cell values