diff --git a/src/finiteVolume/fields/fvPatchFields/derived/mappedField/mappedFieldFvPatchField.C b/src/finiteVolume/fields/fvPatchFields/derived/mappedField/mappedFieldFvPatchField.C
index 19aeaa4a5a1b2d4d78a5db22ba9778e02863b1d7..ae597b4bfccd5b97ef7a2cda69a9623c62b4d16f 100644
--- a/src/finiteVolume/fields/fvPatchFields/derived/mappedField/mappedFieldFvPatchField.C
+++ b/src/finiteVolume/fields/fvPatchFields/derived/mappedField/mappedFieldFvPatchField.C
@@ -227,7 +227,6 @@ void mappedFieldFvPatchField<Type>::updateCoeffs()
 
             const fieldType& nbrField = sampleField();
 
-            const mapDistribute& distMap = mappedPatchBase::map();
             newValues = nbrField.boundaryField()[nbrPatchID];
             this->distribute(newValues);
 
diff --git a/src/lagrangian/intermediate/submodels/Kinematic/SurfaceFilmModel/SurfaceFilmModel/SurfaceFilmModel.C b/src/lagrangian/intermediate/submodels/Kinematic/SurfaceFilmModel/SurfaceFilmModel/SurfaceFilmModel.C
index 36dca28f6a4fcc09a01204b36abd82060d122f76..d080a624a2f68ca809fbcac43d5bdeaa1716ab1b 100644
--- a/src/lagrangian/intermediate/submodels/Kinematic/SurfaceFilmModel/SurfaceFilmModel/SurfaceFilmModel.C
+++ b/src/lagrangian/intermediate/submodels/Kinematic/SurfaceFilmModel/SurfaceFilmModel/SurfaceFilmModel.C
@@ -114,8 +114,8 @@ bool Foam::SurfaceFilmModel<CloudType>::transferParcel
         "bool Foam::SurfaceFilmModel<CloudType>::transferParcel"
         "("
             "parcelType&, "
-            "const label, "
-            "const bool&"
+            "const polyPatch&, "
+            "bool&"
         ")"
     );
 
@@ -156,11 +156,9 @@ void Foam::SurfaceFilmModel<CloudType>::inject(TrackData& td)
         const label filmPatchI = filmPatches[i];
         const label primaryPatchI = primaryPatches[i];
 
-        const mappedPatchBase& mapPatch = filmModel.mappedPatches()[filmPatchI];
-
         const labelList& injectorCellsPatch = pbm[primaryPatchI].faceCells();
 
-        cacheFilmFields(filmPatchI, primaryPatchI, mapPatch, filmModel);
+        cacheFilmFields(filmPatchI, primaryPatchI, filmModel);
 
         const vectorField& Cf = mesh.C().boundaryField()[primaryPatchI];
         const vectorField& Sf = mesh.Sf().boundaryField()[primaryPatchI];
@@ -172,13 +170,11 @@ void Foam::SurfaceFilmModel<CloudType>::inject(TrackData& td)
             {
                 const label cellI = injectorCellsPatch[j];
 
-                // The position is at the cell centre, which could be
-                // in any tet of the decomposed cell, so arbitrarily
-                // choose the first face of the cell as the tetFace
-                // and the first point on the face after the base
-                // point as the tetPt.  The tracking will
-                // pick the cell consistent with the motion in the
-                // first tracking step.
+                // The position could bein any tet of the decomposed cell,
+                // so arbitrarily choose the first face of the cell as the
+                // tetFace and the first point on the face after the base
+                // point as the tetPt.  The tracking will pick the cell
+                // consistent with the motion in the first tracking step.
                 const label tetFaceI = this->owner().mesh().cells()[cellI][0];
                 const label tetPtI = 1;
 
@@ -208,14 +204,22 @@ void Foam::SurfaceFilmModel<CloudType>::inject(TrackData& td)
 
                 setParcelProperties(*pPtr, j);
 
-                // Check new parcel properties
-//                td.cloud().checkParcelProperties(*pPtr, 0.0, true);
-                td.cloud().checkParcelProperties(*pPtr, 0.0, false);
-
-                // Add the new parcel to the cloud
-                td.cloud().addParticle(pPtr);
-
-                nParcelsInjected_++;
+                if (pPtr->nParticle() > 0.001)
+                {
+                    // Check new parcel properties
+    //                td.cloud().checkParcelProperties(*pPtr, 0.0, true);
+                    td.cloud().checkParcelProperties(*pPtr, 0.0, false);
+
+                    // Add the new parcel to the cloud
+                    td.cloud().addParticle(pPtr);
+
+                    nParcelsInjected_++;
+                }
+                else
+                {
+                    // TODO: cache mass and re-distribute?
+                    delete pPtr;
+                }
             }
         }
     }
@@ -227,26 +231,25 @@ void Foam::SurfaceFilmModel<CloudType>::cacheFilmFields
 (
     const label filmPatchI,
     const label primaryPatchI,
-    const mappedPatchBase& mapPatch,
     const regionModels::surfaceFilmModels::surfaceFilmModel& filmModel
 )
 {
     massParcelPatch_ = filmModel.cloudMassTrans().boundaryField()[filmPatchI];
-    mapPatch.distribute(massParcelPatch_);
+    filmModel.toPrimary(filmPatchI, massParcelPatch_);
 
     diameterParcelPatch_ =
         filmModel.cloudDiameterTrans().boundaryField()[filmPatchI];
-    mapPatch.distribute(diameterParcelPatch_);
+    filmModel.toPrimary(filmPatchI, diameterParcelPatch_);
 
     UFilmPatch_ = filmModel.Us().boundaryField()[filmPatchI];
-    mapPatch.distribute(UFilmPatch_);
+    filmModel.toPrimary(filmPatchI, UFilmPatch_);
 
     rhoFilmPatch_ = filmModel.rho().boundaryField()[filmPatchI];
-    mapPatch.distribute(rhoFilmPatch_);
+    filmModel.toPrimary(filmPatchI, rhoFilmPatch_);
 
     deltaFilmPatch_[primaryPatchI] =
         filmModel.delta().boundaryField()[filmPatchI];
-    mapPatch.distribute(deltaFilmPatch_[primaryPatchI]);
+    filmModel.toPrimary(filmPatchI, deltaFilmPatch_[primaryPatchI]);
 }
 
 
diff --git a/src/lagrangian/intermediate/submodels/Kinematic/SurfaceFilmModel/SurfaceFilmModel/SurfaceFilmModel.H b/src/lagrangian/intermediate/submodels/Kinematic/SurfaceFilmModel/SurfaceFilmModel/SurfaceFilmModel.H
index ae35db7ec57e9babb1e9a5d22f2442605efd9f0c..967e748f56c8385483aca4dd3c2f4f280fa42da6 100644
--- a/src/lagrangian/intermediate/submodels/Kinematic/SurfaceFilmModel/SurfaceFilmModel/SurfaceFilmModel.H
+++ b/src/lagrangian/intermediate/submodels/Kinematic/SurfaceFilmModel/SurfaceFilmModel/SurfaceFilmModel.H
@@ -116,7 +116,6 @@ protected:
         (
             const label filmPatchI,
             const label primaryPatchI,
-            const mappedPatchBase& mapPatch,
             const regionModels::surfaceFilmModels::surfaceFilmModel& filmModel
         );
 
diff --git a/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.C b/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.C
index c6f4b4054a84ce8434935a81a179c3495890079c..6a6c60db3984390169d526e356537dd40f29575a 100644
--- a/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.C
+++ b/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.C
@@ -643,7 +643,6 @@ void Foam::ThermoSurfaceFilm<CloudType>::cacheFilmFields
 (
     const label filmPatchI,
     const label primaryPatchI,
-    const mappedPatchBase& mapPatch,
     const regionModels::surfaceFilmModels::surfaceFilmModel& filmModel
 )
 {
@@ -651,15 +650,14 @@ void Foam::ThermoSurfaceFilm<CloudType>::cacheFilmFields
     (
         filmPatchI,
         primaryPatchI,
-        mapPatch,
         filmModel
     );
 
     TFilmPatch_ = filmModel.Ts().boundaryField()[filmPatchI];
-    mapPatch.distribute(TFilmPatch_);
+    filmModel.toPrimary(filmPatchI, TFilmPatch_);
 
     CpFilmPatch_ = filmModel.Cp().boundaryField()[filmPatchI];
-    mapPatch.distribute(CpFilmPatch_);
+    filmModel.toPrimary(filmPatchI, CpFilmPatch_);
 }
 
 
diff --git a/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.H b/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.H
index 66bd1395682b2b38de27006916ed5ab74e42604a..bddbfcc66e9f28034472ff045a00e984850fc896 100644
--- a/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.H
+++ b/src/lagrangian/intermediate/submodels/Thermodynamic/SurfaceFilmModel/ThermoSurfaceFilm/ThermoSurfaceFilm.H
@@ -227,7 +227,6 @@ protected:
             (
                 const label filmPatchI,
                 const label primaryPatchI,
-                const mappedPatchBase& distMap,
                 const regionModels::surfaceFilmModels::surfaceFilmModel&
                     filmModel
             );
diff --git a/src/regionModels/regionCoupling/derivedFvPatchFields/filmPyrolysisTemperatureCoupled/filmPyrolysisTemperatureCoupledFvPatchScalarField.C b/src/regionModels/regionCoupling/derivedFvPatchFields/filmPyrolysisTemperatureCoupled/filmPyrolysisTemperatureCoupledFvPatchScalarField.C
index 8351d49d2da3ecc1cc8b04df86ad661bffffff0b..b0f8d1629a919d008f1267e6dcb99cc5562aef3b 100644
--- a/src/regionModels/regionCoupling/derivedFvPatchFields/filmPyrolysisTemperatureCoupled/filmPyrolysisTemperatureCoupledFvPatchScalarField.C
+++ b/src/regionModels/regionCoupling/derivedFvPatchFields/filmPyrolysisTemperatureCoupled/filmPyrolysisTemperatureCoupledFvPatchScalarField.C
@@ -151,13 +151,11 @@ void Foam::filmPyrolysisTemperatureCoupledFvPatchScalarField::updateCoeffs()
 
     const label filmPatchI = filmModel.regionPatchID(patchI);
 
-    const mappedPatchBase& filmMap = filmModel.mappedPatches()[filmPatchI];
-
     scalarField deltaFilm = filmModel.delta().boundaryField()[filmPatchI];
-    filmMap.distribute(deltaFilm);
+    filmModel.toPrimary(filmPatchI, deltaFilm);
 
     scalarField TFilm = filmModel.Ts().boundaryField()[filmPatchI];
-    filmMap.distribute(TFilm);
+    filmModel.toPrimary(filmPatchI, TFilm);
 
 
     // Retrieve pyrolysis model
@@ -166,10 +164,8 @@ void Foam::filmPyrolysisTemperatureCoupledFvPatchScalarField::updateCoeffs()
 
     const label pyrPatchI = pyrModel.regionPatchID(patchI);
 
-    const mappedPatchBase& pyrMap = pyrModel.mappedPatches()[pyrPatchI];
-
     scalarField TPyr = pyrModel.T().boundaryField()[pyrPatchI];
-    pyrMap.distribute(TPyr);
+    pyrModel.toPrimary(pyrPatchI, TPyr);
 
 
     forAll(deltaFilm, i)
diff --git a/src/regionModels/regionCoupling/derivedFvPatchFields/filmPyrolysisVelocityCoupled/filmPyrolysisVelocityCoupledFvPatchVectorField.C b/src/regionModels/regionCoupling/derivedFvPatchFields/filmPyrolysisVelocityCoupled/filmPyrolysisVelocityCoupledFvPatchVectorField.C
index a516534fa81d8b88fa72f28159f6175a893169ed..29b3e345868bcc112d33535b76bb42e1f89448f6 100644
--- a/src/regionModels/regionCoupling/derivedFvPatchFields/filmPyrolysisVelocityCoupled/filmPyrolysisVelocityCoupledFvPatchVectorField.C
+++ b/src/regionModels/regionCoupling/derivedFvPatchFields/filmPyrolysisVelocityCoupled/filmPyrolysisVelocityCoupledFvPatchVectorField.C
@@ -154,13 +154,11 @@ void Foam::filmPyrolysisVelocityCoupledFvPatchVectorField::updateCoeffs()
 
     const label filmPatchI = filmModel.regionPatchID(patchI);
 
-    const mappedPatchBase& filmMap = filmModel.mappedPatches()[filmPatchI];
-
     scalarField deltaFilm = filmModel.delta().boundaryField()[filmPatchI];
-    filmMap.distribute(deltaFilm);
+    filmModel.toPrimary(filmPatchI, deltaFilm);
 
     vectorField UFilm = filmModel.Us().boundaryField()[filmPatchI];
-    filmMap.distribute(UFilm);
+    filmModel.toPrimary(filmPatchI, UFilm);
 
 
     // Retrieve pyrolysis model
@@ -172,10 +170,8 @@ void Foam::filmPyrolysisVelocityCoupledFvPatchVectorField::updateCoeffs()
 
     const label pyrPatchI = pyrModel.regionPatchID(patchI);
 
-    const mappedPatchBase& pyrMap = pyrModel.mappedPatches()[pyrPatchI];
-
     scalarField phiPyr = pyrModel.phiGas().boundaryField()[pyrPatchI];
-    pyrMap.distribute(phiPyr);
+    pyrModel.toPrimary(pyrPatchI, phiPyr);
 
 
     const surfaceScalarField& phi =
diff --git a/src/regionModels/regionModel/regionModel/regionModel.C b/src/regionModels/regionModel/regionModel/regionModel.C
index 1d74a9c6465fd62809fb415218797839a51b5f6d..f7f630147eb734424cf6ea8cab833d636df100c6 100644
--- a/src/regionModels/regionModel/regionModel/regionModel.C
+++ b/src/regionModels/regionModel/regionModel/regionModel.C
@@ -93,8 +93,6 @@ void Foam::regionModels::regionModel::initialise()
     DynamicList<label> primaryPatchIDs;
     DynamicList<label> intCoupledPatchIDs;
     const polyBoundaryMesh& rbm = regionMesh().boundaryMesh();
-    const polyBoundaryMesh& pbm = primaryMesh().boundaryMesh();
-    mappedPatches_.setSize(rbm.size());
 
     forAll(rbm, patchI)
     {
@@ -116,19 +114,6 @@ void Foam::regionModels::regionModel::initialise()
 
             const label primaryPatchI = mapPatch.samplePolyPatch().index();
             primaryPatchIDs.append(primaryPatchI);
-
-            mappedPatches_.set
-            (
-                patchI,
-                new mappedPatchBase
-                (
-                    pbm[primaryPatchI],
-                    regionMesh().name(),
-                    mapPatch.mode(),
-                    regionPatch.name(),
-                    vector::zero
-                )
-            );
         }
     }
 
@@ -212,8 +197,7 @@ Foam::regionModels::regionModel::regionModel(const fvMesh& mesh)
     regionMeshPtr_(NULL),
     coeffs_(dictionary::null),
     primaryPatchIDs_(),
-    intCoupledPatchIDs_(),
-    mappedPatches_()
+    intCoupledPatchIDs_()
 {}
 
 
@@ -244,8 +228,7 @@ Foam::regionModels::regionModel::regionModel
     regionMeshPtr_(NULL),
     coeffs_(subOrEmptyDict(modelName + "Coeffs")),
     primaryPatchIDs_(),
-    intCoupledPatchIDs_(),
-    mappedPatches_()
+    intCoupledPatchIDs_()
 {
     if (active_)
     {
@@ -290,8 +273,7 @@ Foam::regionModels::regionModel::regionModel
     regionMeshPtr_(NULL),
     coeffs_(dict.subOrEmptyDict(modelName + "Coeffs")),
     primaryPatchIDs_(),
-    intCoupledPatchIDs_(),
-    mappedPatches_()
+    intCoupledPatchIDs_()
 {
     if (active_)
     {
diff --git a/src/regionModels/regionModel/regionModel/regionModel.H b/src/regionModels/regionModel/regionModel/regionModel.H
index bc9fb54a335335be346beefd7807d3784dd7090a..2af98421d108216d76b5606f0ff7d3bf4abc28cc 100644
--- a/src/regionModels/regionModel/regionModel/regionModel.H
+++ b/src/regionModels/regionModel/regionModel/regionModel.H
@@ -117,9 +117,6 @@ protected:
             //- List of patch IDs internally coupled with the primary region
             labelList intCoupledPatchIDs_;
 
-            //- List of patch map info
-            PtrList<mappedPatchBase> mappedPatches_;
-
 
     // Protected member functions
 
@@ -212,13 +209,29 @@ public:
                 //  primary region
                 inline const labelList& intCoupledPatchIDs() const;
 
-                //- Return the list of patch map info
-                inline const PtrList<mappedPatchBase>& mappedPatches() const;
-
                 //- Return region ID corresponding to primaryPatchID
                 inline label regionPatchID(const label primaryPatchID) const;
 
 
+        // Helper
+
+            //- Convert a local region field to the primary region
+            template<class Type>
+            void toPrimary
+            (
+                const label regionPatchI,
+                List<Type>& regionField
+            ) const;
+
+            //- Convert a primary region field to the local region
+            template<class Type>
+            void toRegion
+            (
+                const label regionPatchI,
+                List<Type>& primaryFieldField
+            ) const;
+
+
         // Evolution
 
             //- Pre-evolve region
@@ -249,6 +262,12 @@ public:
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
+#ifdef NoRepository
+    #include "regionModelTemplates.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
 #endif
 
 // ************************************************************************* //
diff --git a/src/regionModels/regionModel/regionModel/regionModelI.H b/src/regionModels/regionModel/regionModel/regionModelI.H
index 197e663d503e2a5dd72eaab257018a5184cebe99..a0e43403f7021bed6682847a1d1d82337304ca5f 100644
--- a/src/regionModels/regionModel/regionModel/regionModelI.H
+++ b/src/regionModels/regionModel/regionModel/regionModelI.H
@@ -132,13 +132,6 @@ Foam::regionModels::regionModel::intCoupledPatchIDs() const
 }
 
 
-inline const Foam::PtrList<Foam::mappedPatchBase>&
-Foam::regionModels::regionModel::mappedPatches() const
-{
-    return mappedPatches_;
-}
-
-
 inline Foam::label Foam::regionModels::regionModel::regionPatchID
 (
     const label primaryPatchID
diff --git a/src/regionModels/regionModel/regionModel/regionModelTemplates.C b/src/regionModels/regionModel/regionModel/regionModelTemplates.C
new file mode 100644
index 0000000000000000000000000000000000000000..977da7dd8167df5a3b5acf703cc09f434602c5b6
--- /dev/null
+++ b/src/regionModels/regionModel/regionModel/regionModelTemplates.C
@@ -0,0 +1,80 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+template<class Type>
+void Foam::regionModels::regionModel::toPrimary
+(
+    const label regionPatchI,
+    List<Type>& regionField
+) const
+{
+    forAll(intCoupledPatchIDs_, i)
+    {
+        if (intCoupledPatchIDs_[i] == regionPatchI)
+        {
+            const mappedPatchBase& mpb =
+                refCast<const mappedPatchBase>
+                (
+                    regionMesh().boundaryMesh()[regionPatchI]
+                );
+            mpb.reverseDistribute(regionField);
+            return;
+        }
+    }
+
+    FatalErrorIn("const void toPrimary(const label, List<Type>&) const")
+        << "Region patch ID " << regionPatchI << " not found in region mesh"
+        << abort(FatalError);
+}
+
+
+template<class Type>
+void Foam::regionModels::regionModel::toRegion
+(
+    const label regionPatchI,
+    List<Type>& primaryField
+) const
+{
+    forAll(intCoupledPatchIDs_, i)
+    {
+        if (intCoupledPatchIDs_[i] == regionPatchI)
+        {
+            const mappedPatchBase& mpb =
+                refCast<const mappedPatchBase>
+                (
+                    regionMesh().boundaryMesh()[regionPatchI]
+                );
+            mpb.distribute(primaryField);
+            return;
+        }
+    }
+
+    FatalErrorIn("const void toRegion(const label, List<Type>&) const")
+        << "Region patch ID " << regionPatchI << " not found in region mesh"
+        << abort(FatalError);
+}
+
+
+// ************************************************************************* //
diff --git a/src/regionModels/surfaceFilmModels/derivedFvPatchFields/wallFunctions/alphatFilmWallFunction/alphatFilmWallFunctionFvPatchScalarField.C b/src/regionModels/surfaceFilmModels/derivedFvPatchFields/wallFunctions/alphatFilmWallFunction/alphatFilmWallFunctionFvPatchScalarField.C
index 8b8ef3be1fbbb1001e5188696705ad0ce5de078f..fd3be5ac38564d18c5fb6e02478b04c3d0d65822 100644
--- a/src/regionModels/surfaceFilmModels/derivedFvPatchFields/wallFunctions/alphatFilmWallFunction/alphatFilmWallFunctionFvPatchScalarField.C
+++ b/src/regionModels/surfaceFilmModels/derivedFvPatchFields/wallFunctions/alphatFilmWallFunction/alphatFilmWallFunctionFvPatchScalarField.C
@@ -158,11 +158,9 @@ void alphatFilmWallFunctionFvPatchScalarField::updateCoeffs()
 
     const label filmPatchI = filmModel.regionPatchID(patchI);
 
-    const mappedPatchBase& filmMap = filmModel.mappedPatches()[filmPatchI];
-
     tmp<volScalarField> mDotFilm(filmModel.primaryMassTrans());
     scalarField mDotFilmp = mDotFilm().boundaryField()[filmPatchI];
-    filmMap.distribute(mDotFilmp);
+    filmModel.toPrimary(filmPatchI, mDotFilmp);
 
     // Retrieve RAS turbulence model
     const RASModel& rasModel = db().lookupObject<RASModel>("RASProperties");
diff --git a/src/regionModels/surfaceFilmModels/derivedFvPatchFields/wallFunctions/mutkFilmWallFunction/mutkFilmWallFunctionFvPatchScalarField.C b/src/regionModels/surfaceFilmModels/derivedFvPatchFields/wallFunctions/mutkFilmWallFunction/mutkFilmWallFunctionFvPatchScalarField.C
index 8cd0aaf5aa455cf2374442535a03457fc8ef16b9..7374f80e034b2191b6dceeb2500308642c87d1a8 100644
--- a/src/regionModels/surfaceFilmModels/derivedFvPatchFields/wallFunctions/mutkFilmWallFunction/mutkFilmWallFunctionFvPatchScalarField.C
+++ b/src/regionModels/surfaceFilmModels/derivedFvPatchFields/wallFunctions/mutkFilmWallFunction/mutkFilmWallFunctionFvPatchScalarField.C
@@ -70,11 +70,9 @@ tmp<scalarField> mutkFilmWallFunctionFvPatchScalarField::calcUTau
 
     const label filmPatchI = filmModel.regionPatchID(patchI);
 
-    const mappedPatchBase& filmMap = filmModel.mappedPatches()[filmPatchI];
-
     tmp<volScalarField> mDotFilm(filmModel.primaryMassTrans());
     scalarField mDotFilmp = mDotFilm().boundaryField()[filmPatchI];
-    filmMap.distribute(mDotFilmp);
+    filmModel.toPrimary(filmPatchI, mDotFilmp);
 
 
     // Retrieve RAS turbulence model
diff --git a/src/regionModels/surfaceFilmModels/thermoSingleLayer/thermoSingleLayer.C b/src/regionModels/surfaceFilmModels/thermoSingleLayer/thermoSingleLayer.C
index c6c373500f5848da211c4df8f04527ca2d4cdbb5..c405d98fa9fc20206f80cf1ad33f7cca8289f4f8 100644
--- a/src/regionModels/surfaceFilmModels/thermoSingleLayer/thermoSingleLayer.C
+++ b/src/regionModels/surfaceFilmModels/thermoSingleLayer/thermoSingleLayer.C
@@ -705,12 +705,11 @@ tmp<DimensionedField<scalar, volMesh> > thermoSingleLayer::Srho() const
     forAll(intCoupledPatchIDs(), i)
     {
         const label filmPatchI = intCoupledPatchIDs()[i];
-        const mappedPatchBase& filmMap = mappedPatches_[filmPatchI];
 
         scalarField patchMass =
             primaryMassPCTrans_.boundaryField()[filmPatchI];
 
-        filmMap.distribute(patchMass);
+        toPrimary(filmPatchI, patchMass);
 
         const label primaryPatchI = primaryPatchIDs()[i];
         const unallocLabelList& cells =
@@ -761,12 +760,11 @@ tmp<DimensionedField<scalar, volMesh> > thermoSingleLayer::Srho
         forAll(intCoupledPatchIDs_, i)
         {
             const label filmPatchI = intCoupledPatchIDs_[i];
-            const mappedPatchBase& filmMap = mappedPatches_[filmPatchI];
 
             scalarField patchMass =
                 primaryMassPCTrans_.boundaryField()[filmPatchI];
 
-            filmMap.distribute(patchMass);
+            toPrimary(filmPatchI, patchMass);
 
             const label primaryPatchI = primaryPatchIDs()[i];
             const unallocLabelList& cells =
@@ -812,12 +810,11 @@ tmp<DimensionedField<scalar, volMesh> > thermoSingleLayer::Sh() const
     forAll(intCoupledPatchIDs_, i)
     {
         const label filmPatchI = intCoupledPatchIDs_[i];
-        const mappedPatchBase& filmMap = mappedPatches_[filmPatchI];
 
         scalarField patchEnergy =
             primaryEnergyPCTrans_.boundaryField()[filmPatchI];
 
-        filmMap.distribute(patchEnergy);
+        toPrimary(filmPatchI, patchEnergy);
 
         const label primaryPatchI = primaryPatchIDs()[i];
         const unallocLabelList& cells =