diff --git a/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricBoundaryField.C b/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricBoundaryField.C
index 705505a716..7fa8d4b8bc 100644
--- a/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricBoundaryField.C
+++ b/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricBoundaryField.C
@@ -72,7 +72,8 @@ GeometricBoundaryField
 (
     const BoundaryMesh& bmesh,
     const DimensionedField<Type, GeoMesh>& field,
-    const wordList& patchFieldTypes
+    const wordList& patchFieldTypes,
+    const wordList& constraintTypes
 )
 :
     FieldField<PatchField, Type>(bmesh.size()),
@@ -83,18 +84,22 @@ GeometricBoundaryField
         Info<< "GeometricField<Type, PatchField, GeoMesh>::"
                "GeometricBoundaryField::"
                "GeometricBoundaryField(const BoundaryMesh&, "
-               "const Field<Type>&, const wordList&)"
+               "const Field<Type>&, const wordList&, const wordList&)"
             << endl;
     }
 
-    if (patchFieldTypes.size() != this->size())
+    if
+    (
+        patchFieldTypes.size() != this->size()
+     || (constraintTypes.size() && (constraintTypes.size() != this->size()))
+    )
     {
         FatalErrorIn
         (
             "GeometricField<Type, PatchField, GeoMesh>::"
             "GeometricBoundaryField::"
             "GeometricBoundaryField(const BoundaryMesh&, "
-            "const Field<Type>&, const wordList&)"
+            "const Field<Type>&, const wordList&, const wordList&)"
         )   << "Incorrect number of patch type specifications given" << nl
             << "    Number of patches in mesh = " << bmesh.size()
             << " number of patch type specifications = "
@@ -102,18 +107,38 @@ GeometricBoundaryField
             << abort(FatalError);
     }
 
-    forAll(bmesh_, patchi)
+    if (constraintTypes.size())
     {
-        set
-        (
-            patchi,
-            PatchField<Type>::New
+        forAll(bmesh_, patchi)
+        {
+            set
             (
-                patchFieldTypes[patchi],
-                bmesh_[patchi],
-                field
-            )
-        );
+                patchi,
+                PatchField<Type>::New
+                (
+                    patchFieldTypes[patchi],
+                    constraintTypes[patchi],
+                    bmesh_[patchi],
+                    field
+                )
+            );
+        }
+    }
+    else
+    {
+        forAll(bmesh_, patchi)
+        {
+            set
+            (
+                patchi,
+                PatchField<Type>::New
+                (
+                    patchFieldTypes[patchi],
+                    bmesh_[patchi],
+                    field
+                )
+            );
+        }
     }
 }
 
diff --git a/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricField.C b/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricField.C
index 8c17c3886b..b4960c341d 100644
--- a/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricField.C
+++ b/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricField.C
@@ -231,14 +231,15 @@ Foam::GeometricField<Type, PatchField, GeoMesh>::GeometricField
     const IOobject& io,
     const Mesh& mesh,
     const dimensionSet& ds,
-    const wordList& patchFieldTypes
+    const wordList& patchFieldTypes,
+    const wordList& actualPatchTypes
 )
 :
     DimensionedField<Type, GeoMesh>(io, mesh, ds),
     timeIndex_(this->time().timeIndex()),
     field0Ptr_(NULL),
     fieldPrevIterPtr_(NULL),
-    boundaryField_(mesh.boundary(), *this, patchFieldTypes)
+    boundaryField_(mesh.boundary(), *this, patchFieldTypes, actualPatchTypes)
 {
     if (debug)
     {
@@ -287,14 +288,15 @@ Foam::GeometricField<Type, PatchField, GeoMesh>::GeometricField
     const IOobject& io,
     const Mesh& mesh,
     const dimensioned<Type>& dt,
-    const wordList& patchFieldTypes
+    const wordList& patchFieldTypes,
+    const wordList& actualPatchTypes
 )
 :
     DimensionedField<Type, GeoMesh>(io, mesh, dt),
     timeIndex_(this->time().timeIndex()),
     field0Ptr_(NULL),
     fieldPrevIterPtr_(NULL),
-    boundaryField_(mesh.boundary(), *this, patchFieldTypes)
+    boundaryField_(mesh.boundary(), *this, patchFieldTypes, actualPatchTypes)
 {
     if (debug)
     {
@@ -653,14 +655,22 @@ Foam::GeometricField<Type, PatchField, GeoMesh>::GeometricField
 (
     const IOobject& io,
     const GeometricField<Type, PatchField, GeoMesh>& gf,
-    const wordList& patchFieldTypes
+    const wordList& patchFieldTypes,
+    const wordList& actualPatchTypes
+
 )
 :
     DimensionedField<Type, GeoMesh>(io, gf),
     timeIndex_(gf.timeIndex()),
     field0Ptr_(NULL),
     fieldPrevIterPtr_(NULL),
-    boundaryField_(this->mesh().boundary(), *this, patchFieldTypes)
+    boundaryField_
+    (
+        this->mesh().boundary(),
+        *this,
+        patchFieldTypes,
+        actualPatchTypes
+    )
 {
     if (debug)
     {
diff --git a/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricField.H b/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricField.H
index 7d529ab40f..fa8ec179e4 100644
--- a/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricField.H
+++ b/src/OpenFOAM/fields/GeometricFields/GeometricField/GeometricField.H
@@ -128,12 +128,14 @@ public:
 
             //- Construct from a BoundaryMesh,
             //  reference to the internal field
-            //  and a wordList of patch types
+            //  and a wordList of patch types and optional the actual patch
+            //  types (to override constraint patches)
             GeometricBoundaryField
             (
                 const BoundaryMesh&,
                 const DimensionedInternalField&,
-                const wordList&
+                const wordList& wantedPatchTypes,
+                const wordList& actualPatchTypes = wordList()
             );
 
             //- Construct from a BoundaryMesh,
@@ -283,7 +285,8 @@ public:
             const IOobject&,
             const Mesh&,
             const dimensionSet&,
-            const wordList& patchFieldTypes
+            const wordList& wantedPatchTypes,
+            const wordList& actualPatchTypes = wordList()
         );
 
         //- Constructor given IOobject, mesh, dimensioned<Type> and patch type.
@@ -301,7 +304,8 @@ public:
             const IOobject&,
             const Mesh&,
             const dimensioned<Type>&,
-            const wordList& patchFieldTypes
+            const wordList& wantedPatchTypes,
+            const wordList& actualPatchTypes = wordList()
         );
 
         //- Constructor from components
@@ -387,7 +391,8 @@ public:
         (
             const IOobject&,
             const GeometricField<Type, PatchField, GeoMesh>&,
-            const wordList& patchFieldTypes
+            const wordList& patchFieldTypes,
+            const wordList& actualPatchTypes = wordList()
         );
 
 
diff --git a/src/OpenFOAM/fields/pointPatchFields/pointPatchField/newPointPatchField.C b/src/OpenFOAM/fields/pointPatchFields/pointPatchField/newPointPatchField.C
index b14fbeac8f..749511b2cf 100644
--- a/src/OpenFOAM/fields/pointPatchFields/pointPatchField/newPointPatchField.C
+++ b/src/OpenFOAM/fields/pointPatchFields/pointPatchField/newPointPatchField.C
@@ -29,6 +29,7 @@ template<class Type>
 Foam::autoPtr<Foam::pointPatchField<Type> > Foam::pointPatchField<Type>::New
 (
     const word& patchFieldType,
+    const word& actualPatchType,
     const pointPatch& p,
     const DimensionedField<Type, pointMesh>& iF
 )
@@ -36,7 +37,8 @@ Foam::autoPtr<Foam::pointPatchField<Type> > Foam::pointPatchField<Type>::New
     if (debug)
     {
         Info<< "PointPatchField<Type>::"
-               "New(const word&, const pointPatch&, const Field<Type>&) : "
+               "New(const word&, const word&"
+                ", const pointPatch&, const Field<Type>&) : "
                "constructing pointPatchField<Type>"
             << endl;
     }
@@ -49,7 +51,7 @@ Foam::autoPtr<Foam::pointPatchField<Type> > Foam::pointPatchField<Type>::New
         FatalErrorIn
         (
             "PointPatchField<Type>::New"
-            "(const word&, const pointPatch&, const Field<Type>&)"
+            "(const word&, const word&, const pointPatch&, const Field<Type>&)"
         )   << "Unknown patchFieldType type "
             << patchFieldType
             << endl << endl
@@ -60,31 +62,48 @@ Foam::autoPtr<Foam::pointPatchField<Type> > Foam::pointPatchField<Type>::New
 
     autoPtr<pointPatchField<Type> > pfPtr(cstrIter()(p, iF));
 
-    if (pfPtr().constraintType() == p.constraintType())
+    if
+    (
+        actualPatchType == word::null
+     || actualPatchType != p.type()
+    )
     {
-        // Compatible (constraint-wise) with the patch type
-        return pfPtr;
-    }
-    else
-    {
-        // Use default constraint type
-        typename pointPatchConstructorTable::iterator patchTypeCstrIter =
-            pointPatchConstructorTablePtr_->find(p.type());
-
-        if (patchTypeCstrIter == pointPatchConstructorTablePtr_->end())
+        if (pfPtr().constraintType() != p.constraintType())
         {
-            FatalErrorIn
-            (
-                "PointPatchField<Type>::New"
-                "(const word&, const pointPatch&, const Field<Type>&)"
-            )   << "inconsistent patch and patchField types for \n"
-                << "    patch type " << p.type()
-                << " and patchField type " << patchFieldType
-                << exit(FatalError);
-        }
+            // Use default constraint type
+            typename pointPatchConstructorTable::iterator patchTypeCstrIter =
+                pointPatchConstructorTablePtr_->find(p.type());
 
-        return patchTypeCstrIter()(p, iF);
+            if (patchTypeCstrIter == pointPatchConstructorTablePtr_->end())
+            {
+                FatalErrorIn
+                (
+                    "PointPatchField<Type>::New"
+                    "(const word&, const word&"
+                    ", const pointPatch&, const Field<Type>&)"
+                )   << "inconsistent patch and patchField types for \n"
+                    << "    patch type " << p.type()
+                    << " and patchField type " << patchFieldType
+                    << exit(FatalError);
+            }
+
+            return patchTypeCstrIter()(p, iF);
+        }
     }
+
+    return pfPtr;
+}
+
+
+template<class Type>
+Foam::autoPtr<Foam::pointPatchField<Type> > Foam::pointPatchField<Type>::New
+(
+    const word& patchFieldType,
+    const pointPatch& p,
+    const DimensionedField<Type, pointMesh>& iF
+)
+{
+    return New(patchFieldType, word::null, p, iF);
 }
 
 
diff --git a/src/OpenFOAM/fields/pointPatchFields/pointPatchField/pointPatchField.H b/src/OpenFOAM/fields/pointPatchFields/pointPatchField/pointPatchField.H
index 98604bb4bf..869c536365 100644
--- a/src/OpenFOAM/fields/pointPatchFields/pointPatchField/pointPatchField.H
+++ b/src/OpenFOAM/fields/pointPatchFields/pointPatchField/pointPatchField.H
@@ -35,7 +35,7 @@ Description
 
 SourceFiles
     pointPatchField.C
-    newpointPatchField.C
+    newPointPatchField.C
 
 \*---------------------------------------------------------------------------*/
 
@@ -199,6 +199,18 @@ public:
             const DimensionedField<Type, pointMesh>&
         );
 
+        //- Return a pointer to a new patchField created on freestore given
+        //  patch and internal field
+        //  (does not set the patch field values).
+        //  Allows override of constraint type
+        static autoPtr<pointPatchField<Type> > New
+        (
+            const word&,
+            const word& actualPatchType,
+            const pointPatch&,
+            const DimensionedField<Type, pointMesh>&
+        );
+
         //- Return a pointer to a new patchField created on freestore from
         //  a given pointPatchField mapped onto a new patch
         static autoPtr<pointPatchField<Type> > New
diff --git a/src/finiteVolume/fields/fvPatchFields/fvPatchField/fvPatchField.H b/src/finiteVolume/fields/fvPatchFields/fvPatchField/fvPatchField.H
index 1a8720af06..b1df3530ee 100644
--- a/src/finiteVolume/fields/fvPatchFields/fvPatchField/fvPatchField.H
+++ b/src/finiteVolume/fields/fvPatchFields/fvPatchField/fvPatchField.H
@@ -226,6 +226,18 @@ public:
             const DimensionedField<Type, volMesh>&
         );
 
+        //- Return a pointer to a new patchField created on freestore given
+        //  patch and internal field
+        //  (does not set the patch field values).
+        //  Allows override of constraint type
+        static tmp<fvPatchField<Type> > New
+        (
+            const word&,
+            const word& actualPatchType,
+            const fvPatch&,
+            const DimensionedField<Type, volMesh>&
+        );
+
         //- Return a pointer to a new patchField created on freestore from
         //  a given fvPatchField mapped onto a new patch
         static tmp<fvPatchField<Type> > New
diff --git a/src/finiteVolume/fields/fvPatchFields/fvPatchField/newFvPatchField.C b/src/finiteVolume/fields/fvPatchFields/fvPatchField/newFvPatchField.C
index 8f89f202d9..86884666a9 100644
--- a/src/finiteVolume/fields/fvPatchFields/fvPatchField/newFvPatchField.C
+++ b/src/finiteVolume/fields/fvPatchFields/fvPatchField/newFvPatchField.C
@@ -29,14 +29,16 @@ template<class Type>
 Foam::tmp<Foam::fvPatchField<Type> > Foam::fvPatchField<Type>::New
 (
     const word& patchFieldType,
+    const word& actualPatchType,
     const fvPatch& p,
     const DimensionedField<Type, volMesh>& iF
 )
 {
     if (debug)
     {
-        Info<< "fvPatchField<Type>::New(const word&, const fvPatch&, "
-               "const DimensionedField<Type, volMesh>&) : patchFieldType="
+        Info<< "fvPatchField<Type>::New(const word&, const word&, "
+               "const fvPatch&, const DimensionedField<Type, volMesh>&) :"
+               " patchFieldType="
             << patchFieldType
             << endl;
     }
@@ -48,7 +50,7 @@ Foam::tmp<Foam::fvPatchField<Type> > Foam::fvPatchField<Type>::New
     {
         FatalErrorIn
         (
-            "fvPatchField<Type>::New(const word&, const fvPatch&, "
+            "fvPatchField<Type>::New(const word&, const word&, const fvPatch&, "
             "const DimensionedField<Type, volMesh>&)"
         )   << "Unknown patchTypefield type " << patchFieldType
             << endl << endl
@@ -57,12 +59,23 @@ Foam::tmp<Foam::fvPatchField<Type> > Foam::fvPatchField<Type>::New
             << exit(FatalError);
     }
 
-    typename patchConstructorTable::iterator patchTypeCstrIter =
-        patchConstructorTablePtr_->find(p.type());
-
-    if (patchTypeCstrIter != patchConstructorTablePtr_->end())
+    if
+    (
+        actualPatchType == word::null
+     || actualPatchType != p.type()
+    )
     {
-        return patchTypeCstrIter()(p, iF);
+        typename patchConstructorTable::iterator patchTypeCstrIter =
+            patchConstructorTablePtr_->find(p.type());
+
+        if (patchTypeCstrIter != patchConstructorTablePtr_->end())
+        {
+            return patchTypeCstrIter()(p, iF);
+        }
+        else
+        {
+            return cstrIter()(p, iF);
+        }
     }
     else
     {
@@ -71,6 +84,18 @@ Foam::tmp<Foam::fvPatchField<Type> > Foam::fvPatchField<Type>::New
 }
 
 
+template<class Type>
+Foam::tmp<Foam::fvPatchField<Type> > Foam::fvPatchField<Type>::New
+(
+    const word& patchFieldType,
+    const fvPatch& p,
+    const DimensionedField<Type, volMesh>& iF
+)
+{
+    return New(patchFieldType, word::null, p, iF);
+}
+
+
 template<class Type>
 Foam::tmp<Foam::fvPatchField<Type> > Foam::fvPatchField<Type>::New
 (
diff --git a/src/finiteVolume/fields/fvsPatchFields/fvsPatchField/fvsPatchField.H b/src/finiteVolume/fields/fvsPatchFields/fvsPatchField/fvsPatchField.H
index b98fdcd453..c400d78d20 100644
--- a/src/finiteVolume/fields/fvsPatchFields/fvsPatchField/fvsPatchField.H
+++ b/src/finiteVolume/fields/fvsPatchFields/fvsPatchField/fvsPatchField.H
@@ -216,6 +216,18 @@ public:
             const DimensionedField<Type, surfaceMesh>&
         );
 
+        //- Return a pointer to a new patchField created on freestore given
+        //  patch and internal field
+        //  (does not set the patch field values)
+        //  Allows override of constraint type
+        static tmp<fvsPatchField<Type> > New
+        (
+            const word&,
+            const word& actualPatchType, 
+            const fvPatch&,
+            const DimensionedField<Type, surfaceMesh>&
+        );
+
         //- Return a pointer to a new patchField created on freestore from
         //  a given fvsPatchField mapped onto a new patch
         static tmp<fvsPatchField<Type> > New
diff --git a/src/finiteVolume/fields/fvsPatchFields/fvsPatchField/newFvsPatchField.C b/src/finiteVolume/fields/fvsPatchFields/fvsPatchField/newFvsPatchField.C
index b33ee35043..b8ad302fdd 100644
--- a/src/finiteVolume/fields/fvsPatchFields/fvsPatchField/newFvsPatchField.C
+++ b/src/finiteVolume/fields/fvsPatchFields/fvsPatchField/newFvsPatchField.C
@@ -34,14 +34,15 @@ template<class Type>
 tmp<fvsPatchField<Type> > fvsPatchField<Type>::New
 (
     const word& patchFieldType,
+    const word& actualPatchType,
     const fvPatch& p,
     const DimensionedField<Type, surfaceMesh>& iF
 )
 {
     if (debug)
     {
-        Info<< "fvsPatchField<Type>::New(const word&, const fvPatch&, "
-               "const Field<Type>&) : "
+        Info<< "fvsPatchField<Type>::New(const word&, const word&"
+               ", const fvPatch&, const Field<Type>&) : "
                "constructing fvsPatchField<Type>"
             << endl;
     }
@@ -53,8 +54,8 @@ tmp<fvsPatchField<Type> > fvsPatchField<Type>::New
     {
         FatalErrorIn
         (
-            "fvsPatchField<Type>::New(const word&, const fvPatch&, "
-            "const Field<Type>&)"
+            "fvsPatchField<Type>::New(const word&, const word&, const fvPatch&"
+            ", const Field<Type>&)"
         )   << "Unknown patchTypefield type " << patchFieldType
             << endl << endl
             << "Valid patchField types are :" << endl
@@ -62,12 +63,23 @@ tmp<fvsPatchField<Type> > fvsPatchField<Type>::New
             << exit(FatalError);
     }
 
-    typename patchConstructorTable::iterator patchTypeCstrIter =
-        patchConstructorTablePtr_->find(p.type());
-
-    if (patchTypeCstrIter != patchConstructorTablePtr_->end())
+    if
+    (
+        actualPatchType == word::null
+     || actualPatchType != p.type()
+    )
     {
-        return patchTypeCstrIter()(p, iF);
+        typename patchConstructorTable::iterator patchTypeCstrIter =
+            patchConstructorTablePtr_->find(p.type());
+
+        if (patchTypeCstrIter != patchConstructorTablePtr_->end())
+        {
+            return patchTypeCstrIter()(p, iF);
+        }
+        else
+        {
+            return cstrIter()(p, iF);
+        }
     }
     else
     {
@@ -76,6 +88,18 @@ tmp<fvsPatchField<Type> > fvsPatchField<Type>::New
 }
 
 
+template<class Type>
+tmp<fvsPatchField<Type> > fvsPatchField<Type>::New
+(
+    const word& patchFieldType,
+    const fvPatch& p,
+    const DimensionedField<Type, surfaceMesh>& iF
+)
+{
+    return New(patchFieldType, word::null, p, iF);
+}
+
+
 template<class Type>
 tmp<fvsPatchField<Type> > fvsPatchField<Type>::New
 (
diff --git a/src/postProcessing/functionObjects/field/fieldValues/cellSource/cellSource.C b/src/postProcessing/functionObjects/field/fieldValues/cellSource/cellSource.C
index 9d65cefc57..97cd9393bd 100644
--- a/src/postProcessing/functionObjects/field/fieldValues/cellSource/cellSource.C
+++ b/src/postProcessing/functionObjects/field/fieldValues/cellSource/cellSource.C
@@ -80,10 +80,11 @@ void Foam::fieldValues::cellSource::setCellZoneCells()
     }
 
     cellId_.setSize(count);
+    nCells_ = returnReduce(cellId_.size(), sumOp<label>());
 
     if (debug)
     {
-        Info<< "Original cell zone size = " << cZone.size()
+        Pout<< "Original cell zone size = " << cZone.size()
             << ", new size = " << count << endl;
     }
 }
@@ -109,8 +110,8 @@ void Foam::fieldValues::cellSource::initialise(const dictionary& dict)
     }
 
     Info<< type() << " " << name_ << ":" << nl
-        << "    total cells  = " << cellId_.size() << nl
-        << "    total volume = " << sum(filterField(mesh().V()))
+        << "    total cells  = " << nCells_ << nl
+        << "    total volume = " << gSum(filterField(mesh().V()))
         << nl << endl;
 
     if (operation_ == opWeightedAverage)
@@ -144,7 +145,7 @@ void Foam::fieldValues::cellSource::writeFileHeader()
     {
         outputFilePtr_()
             << "# Source : " << sourceTypeNames_[source_] << " "
-            << sourceName_ <<  nl << "# Cells  : " << cellId_.size() << nl
+            << sourceName_ <<  nl << "# Cells  : " << nCells_ << nl
             << "# Time" << tab << "sum(V)";
 
         forAll(fields_, i)
@@ -172,6 +173,7 @@ Foam::fieldValues::cellSource::cellSource
     fieldValue(name, obr, dict, loadFromFiles),
     source_(sourceTypeNames_.read(dict.lookup("source"))),
     operation_(operationTypeNames_.read(dict.lookup("operation"))),
+    nCells_(0),
     cellId_()
 {
     read(dict);
diff --git a/src/postProcessing/functionObjects/field/fieldValues/cellSource/cellSource.H b/src/postProcessing/functionObjects/field/fieldValues/cellSource/cellSource.H
index 8108f7891c..c271a1c997 100644
--- a/src/postProcessing/functionObjects/field/fieldValues/cellSource/cellSource.H
+++ b/src/postProcessing/functionObjects/field/fieldValues/cellSource/cellSource.H
@@ -133,6 +133,9 @@ protected:
         //- Operation to apply to values
         operationType operation_;
 
+        //- Global number of cells
+        label nCells_;
+
         //- Local list of cell IDs
         labelList cellId_;
 
diff --git a/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSource.C b/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSource.C
index b6788e1af2..e19a80dc2a 100644
--- a/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSource.C
+++ b/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSource.C
@@ -78,7 +78,7 @@ void Foam::fieldValues::faceSource::setFaceZoneFaces()
 
     faceId_.setSize(fZone.size());
     facePatchId_.setSize(fZone.size());
-    flipMap_.setSize(fZone.size());
+    faceSign_.setSize(fZone.size());
 
     label count = 0;
     forAll(fZone, i)
@@ -134,11 +134,11 @@ void Foam::fieldValues::faceSource::setFaceZoneFaces()
         {
             if (fZone.flipMap()[i])
             {
-                flipMap_[count] = -1;
+                faceSign_[count] = -1;
             }
             else
             {
-                flipMap_[count] = 1;
+                faceSign_[count] = 1;
             }
             faceId_[count] = faceId;
             facePatchId_[count] = facePatchId;
@@ -148,11 +148,12 @@ void Foam::fieldValues::faceSource::setFaceZoneFaces()
 
     faceId_.setSize(count);
     facePatchId_.setSize(count);
-    flipMap_.setSize(count);
+    faceSign_.setSize(count);
+    nFaces_ = returnReduce(faceId_.size(), sumOp<label>());
 
     if (debug)
     {
-        Info<< "Original face zone size = " << fZone.size()
+        Pout<< "Original face zone size = " << fZone.size()
             << ", new size = " << count << endl;
     }
 }
@@ -187,13 +188,14 @@ void Foam::fieldValues::faceSource::setPatchFaces()
 
     faceId_.setSize(nFaces);
     facePatchId_.setSize(nFaces);
-    flipMap_.setSize(nFaces);
+    faceSign_.setSize(nFaces);
+    nFaces_ = returnReduce(faceId_.size(), sumOp<label>());
 
     forAll(faceId_, faceI)
     {
         faceId_[faceI] = faceI;
         facePatchId_[faceI] = patchId;
-        flipMap_[faceI] = 1;
+        faceSign_[faceI] = 1;
     }
 }
 
@@ -216,7 +218,7 @@ void Foam::fieldValues::faceSource::initialise(const dictionary& dict)
         }
         default:
         {
-            FatalErrorIn("faceSource::initiliase()")
+            FatalErrorIn("faceSource::initialise()")
                 << type() << " " << name_ << ": "
                 << sourceTypeNames_[source_] << "(" << sourceName_ << "):"
                 << nl << "    Unknown source type. Valid source types are:"
@@ -225,8 +227,10 @@ void Foam::fieldValues::faceSource::initialise(const dictionary& dict)
     }
 
     Info<< type() << " " << name_ << ":" << nl
-        << "    total faces  = " << faceId_.size() << nl
-        << "    total area   = " << sum(filterField(mesh().magSf())) << nl;
+        << "    total faces  = " << nFaces_
+        << nl
+        << "    total area   = " << gSum(filterField(mesh().magSf(), false))
+        << nl;
 
     if (operation_ == opWeightedAverage)
     {
@@ -260,7 +264,7 @@ void Foam::fieldValues::faceSource::writeFileHeader()
     {
         outputFilePtr_()
             << "# Source : " << sourceTypeNames_[source_] << " "
-            << sourceName_ <<  nl << "# Faces  : " << faceId_.size() << nl
+            << sourceName_ <<  nl << "# Faces  : " << nFaces_ << nl
             << "# Time" << tab << "sum(magSf)";
 
         forAll(fields_, i)
@@ -288,9 +292,10 @@ Foam::fieldValues::faceSource::faceSource
     fieldValue(name, obr, dict, loadFromFiles),
     source_(sourceTypeNames_.read(dict.lookup("source"))),
     operation_(operationTypeNames_.read(dict.lookup("operation"))),
+    nFaces_(0),
     faceId_(),
     facePatchId_(),
-    flipMap_(),
+    faceSign_(),
     weightFieldName_("undefinedWeightedFieldName")
 {
     read(dict);
@@ -326,7 +331,7 @@ void Foam::fieldValues::faceSource::write()
         {
             outputFilePtr_()
                 << obr_.time().value() << tab
-                << sum(filterField(mesh().magSf()));
+                << sum(filterField(mesh().magSf(), false));
         }
 
         forAll(fields_, i)
diff --git a/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSource.H b/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSource.H
index e80e1b31ea..dc3d092334 100644
--- a/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSource.H
+++ b/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSource.H
@@ -53,6 +53,15 @@ Description
       - areaAverage
       - areaIntegrate
       - weightedAverage
+      - min
+      - max
+
+    Notes:
+    - faces on empty patches get ignored
+    - if the field is a volField the faceZone can only consist of boundary
+    faces.
+    - all fields get oriented according to the faceZone (so you might e.g. see
+    negative pressure)
 
 SourceFiles
     faceSource.C
@@ -64,7 +73,6 @@ SourceFiles
 
 #include "NamedEnum.H"
 #include "fieldValue.H"
-#include "labelList.H"
 #include "surfaceFieldsFwd.H"
 #include "volFieldsFwd.H"
 
@@ -136,14 +144,17 @@ protected:
         //- Operation to apply to values
         operationType operation_;
 
+        //- Global number of faces
+        label nFaces_;
+
         //- Local list of face IDs
         labelList faceId_;
 
         //- Local list of patch ID per face
         labelList facePatchId_;
 
-        //- List of +1/-1 representing face flip map
-        labelList flipMap_;
+        //- List of +1/-1 representing face flip map (1 use as is, -1 negate)
+        labelList faceSign_;
 
         //- Weight field name - only used for opWeightedAverage mode
         word weightFieldName_;
@@ -209,7 +220,7 @@ public:
             inline const labelList& facePatch() const;
 
             //- Return the list of +1/-1 representing face flip map
-            inline const labelList& flipMap() const;
+            inline const labelList& faceSign() const;
 
 
         // Function object functions
@@ -228,14 +239,16 @@ public:
             template<class Type>
             tmp<Field<Type> > filterField
             (
-                const GeometricField<Type, fvsPatchField, surfaceMesh>& field
+                const GeometricField<Type, fvsPatchField, surfaceMesh>& field,
+                const bool applyOrientation
             ) const;
 
             //- Filter a volume field according to faceIds
             template<class Type>
             tmp<Field<Type> > filterField
             (
-                const GeometricField<Type, fvPatchField, volMesh>& field
+                const GeometricField<Type, fvPatchField, volMesh>& field,
+                const bool applyOrientation
             ) const;
 };
 
diff --git a/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSourceI.H b/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSourceI.H
index 18ab0766eb..2ef320febb 100644
--- a/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSourceI.H
+++ b/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSourceI.H
@@ -49,9 +49,9 @@ Foam::fieldValues::faceSource::facePatch() const
 
 
 inline const Foam::labelList&
-Foam::fieldValues::faceSource::flipMap() const
+Foam::fieldValues::faceSource::faceSign() const
 {
-    return flipMap_;
+    return faceSign_;
 }
 
 
diff --git a/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSourceTemplates.C b/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSourceTemplates.C
index 7c9ab9dbec..dfa293a082 100644
--- a/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSourceTemplates.C
+++ b/src/postProcessing/functionObjects/field/fieldValues/faceSource/faceSourceTemplates.C
@@ -60,14 +60,14 @@ Foam::tmp<Foam::Field<Type> > Foam::fieldValues::faceSource::setFieldValues
 
     if (obr_.foundObject<sf>(fieldName))
     {
-        return filterField(obr_.lookupObject<sf>(fieldName));
+        return filterField(obr_.lookupObject<sf>(fieldName), true);
     }
     else if (obr_.foundObject<vf>(fieldName))
     {
-        return filterField(obr_.lookupObject<vf>(fieldName));
+        return filterField(obr_.lookupObject<vf>(fieldName), true);
     }
 
-    return tmp<Field<Type> >(new Field<Type>(0.0));
+    return tmp<Field<Type> >(new Field<Type>(0));
 }
 
 
@@ -131,10 +131,13 @@ bool Foam::fieldValues::faceSource::writeValues(const word& fieldName)
 
     if (ok)
     {
+        // Get (correctly oriented) field
         Field<Type> values = combineFields(setFieldValues<Type>(fieldName));
 
-        scalarField magSf = combineFields(filterField(mesh().magSf()));
+        // Get unoriented magSf
+        scalarField magSf = combineFields(filterField(mesh().magSf(), false));
 
+        // Get (correctly oriented) weighting field
         scalarField weightField =
             combineFields(setFieldValues<scalar>(weightFieldName_));
 
@@ -177,7 +180,8 @@ bool Foam::fieldValues::faceSource::writeValues(const word& fieldName)
 template<class Type>
 Foam::tmp<Foam::Field<Type> > Foam::fieldValues::faceSource::filterField
 (
-    const GeometricField<Type, fvPatchField, volMesh>& field
+    const GeometricField<Type, fvPatchField, volMesh>& field,
+    const bool applyOrientation
 ) const
 {
     tmp<Field<Type> > tvalues(new Field<Type>(faceId_.size()));
@@ -205,8 +209,14 @@ Foam::tmp<Foam::Field<Type> > Foam::fieldValues::faceSource::filterField
                 << "    Unable to process internal faces for volume field "
                 << field.name() << nl << abort(FatalError);
         }
+    }
 
-        values[i] *= flipMap_[i];
+    if (applyOrientation)
+    {
+        forAll(values, i)
+        {
+            values[i] *= faceSign_[i];
+        }
     }
 
     return tvalues;
@@ -216,7 +226,8 @@ Foam::tmp<Foam::Field<Type> > Foam::fieldValues::faceSource::filterField
 template<class Type>
 Foam::tmp<Foam::Field<Type> > Foam::fieldValues::faceSource::filterField
 (
-    const GeometricField<Type, fvsPatchField, surfaceMesh>& field
+    const GeometricField<Type, fvsPatchField, surfaceMesh>& field,
+    const bool applyOrientation
 ) const
 {
     tmp<Field<Type> > tvalues(new Field<Type>(faceId_.size()));
@@ -234,8 +245,14 @@ Foam::tmp<Foam::Field<Type> > Foam::fieldValues::faceSource::filterField
         {
             values[i] = field[faceI];
         }
+    }
 
-        values[i] *= flipMap_[i];
+    if (applyOrientation)
+    {
+        forAll(values, i)
+        {
+            values[i] *= faceSign_[i];
+        }
     }
 
     return tvalues;