diff --git a/src/fvOptions/Make/files b/src/fvOptions/Make/files
index 0bc89d8246..b93858afed 100644
--- a/src/fvOptions/Make/files
+++ b/src/fvOptions/Make/files
@@ -33,8 +33,8 @@ $(derivedSources)/solidificationMeltingSource/solidificationMeltingSource.C
 $(derivedSources)/solidificationMeltingSource/solidificationMeltingSourceIO.C
 $(derivedSources)/tabulatedAccelerationSource/tabulatedAccelerationSource.C
 $(derivedSources)/tabulatedAccelerationSource/tabulated6DoFAcceleration/tabulated6DoFAcceleration.C
-$(derivedSources)/directionalPressureGradientExplicitSource/directionalPressureGradientExplicitSource.C
-$(derivedSources)/directionalPressureGradientExplicitSource/directionalPressureGradientExplicitSourceIO.C
+//$(derivedSources)/directionalPressureGradientExplicitSource/directionalPressureGradientExplicitSource.C
+//$(derivedSources)/directionalPressureGradientExplicitSource/directionalPressureGradientExplicitSourceIO.C
 $(derivedSources)/buoyancyForce/buoyancyForce.C
 $(derivedSources)/buoyancyForce/buoyancyForceIO.C
 $(derivedSources)/buoyancyEnergy/buoyancyEnergy.C
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/radiationProperties b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/radiationProperties
index 3605fbe68e..7c520c867b 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/radiationProperties
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/externalSolarLoad/constant/air/radiationProperties
@@ -21,54 +21,55 @@ radiationModel  solarLoad;
 
 solarLoadCoeffs
 {
+    // Calculate reflected/secondary heat fluxes
     useVFbeamToDiffuse  true;
 
+    // Sun direction ray model. Give the sunDirection or calculated using the
+    // (solar calculator)
     sunDirectionModel   sunDirTraking;//sunDirConstant;
 
-    // Time interval to update Sun position (sec)
-    sunTrackingUpdateInterval 800;
+        // Time interval to update Sun position (sec)
+        sunTrackingUpdateInterval 800;
 
-    // Sun ray direction. Give the sunDirection or calculated using the
-    // solar calculator
+        //sunDirection        (-1 1 -1);
 
-    //sunDirection        (-1 1 -1);
+        localStandardMeridian   9;      // GMT offset (hours)
+        startDay                204;    // day of the year
+        startTime               15;     // time of the day (hours decimal)
+        longitude               139.74; // longitude (degrees)
+        latitude                35.658; // latitude (degrees)
 
-    localStandardMeridian   9;      // GMT offset (hours)
-    startDay                204;    // day of the year
-    startTime               15;     // time of the day (hours decimal)
-    longitude               139.74; // longitude (degrees)
-    latitude                35.658; // latitude (degrees)
-
-    // Grid orientation
-    gridUp                  (0 0 1);
-    gridEast                (1 0 0);
+        // Grid orientation
+        gridUp                  (0 0 1);
+        gridEast                (1 0 0);
 
     // Energy spectrum
     spectralDistribution (1 1);
 
     // Solar model:
-    // sunLoadConstant-sunLoadFairWeatherConditions-SunLoadTheoreticalMaximum;
-    sunLoadModel sunLoadFairWeatherConditions;
 
-    // Sun load constant model
-    directSolarRad  500;
-    diffuseSolarRad 40;
+        // sunLoadConstant-sunLoadFairWeatherConditions-SunLoadTheoreticalMaximum;
+        sunLoadModel sunLoadFairWeatherConditions;
 
-    // Fair Weather Conditions Model Constants.
-    // Calculate beta from the Solar calculator or input
-    A       300;        // Apparent solar irradiation at air mass m = 0
-    B       0.142;      // Atmospheric extinction coefficient
-    //beta    45;       // Solar altitude (in degrees) above the horizontal
+        // Sun load constant model
+        directSolarRad  500;    // [w/m2]
+        diffuseSolarRad 40;     // [w/m2]
 
-    // Theoretical maximum model constants
-    Setrn       10;
-    SunPrime    1;
+        // Fair Weather Conditions Model Constants.
+        // Calculate beta from the Solar calculator or input
+        A       300;        // Apparent solar irradiation at air mass m = 0
+        B       0.142;      // Atmospheric extinction coefficient
+        //beta    45;       // Solar altitude (in degrees) above the horizontal
 
-    // Ground reflectivity
-    groundReflectivity 0.2;
+        // Theoretical maximum model constants
+        Setrn       10;
+        SunPrime    1;
 
-    // Solar diffusivity constants
-    C   0.058;  // Model constant
+        // Ground reflectivity
+        groundReflectivity 0.2;
+
+        // Solar diffusivity constants
+        C   0.058;  // Model constant
 
     // Radiative flux coupling flags
     solidCoupled    true;  //Couple through Qr the solid regions (default true)
diff --git a/tutorials/heatTransfer/chtMultiRegionFoam/windshieldCondensation/system/cabin/fvOptions b/tutorials/heatTransfer/chtMultiRegionFoam/windshieldCondensation/system/cabin/fvOptions
index 0c50cbd4ee..0c21fb6004 100644
--- a/tutorials/heatTransfer/chtMultiRegionFoam/windshieldCondensation/system/cabin/fvOptions
+++ b/tutorials/heatTransfer/chtMultiRegionFoam/windshieldCondensation/system/cabin/fvOptions
@@ -14,7 +14,7 @@ FoamFile
     object      fvOptions;
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
+/*
 airDeflection
 {
     type            directionalPressureGradientExplicitSource;
@@ -47,5 +47,5 @@ airDeflection
         fileName        "volFlowRateTable";
     }
 }
-
+*/
 // ************************************************************************* //