diff --git a/src/thermophysicalModels/specie/thermo/hRefConst/hRefConstThermo.C b/src/thermophysicalModels/specie/thermo/hRefConst/hRefConstThermo.C
new file mode 100644
index 000000000..fe83f1794
--- /dev/null
+++ b/src/thermophysicalModels/specie/thermo/hRefConst/hRefConstThermo.C
@@ -0,0 +1,97 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 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/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "hRefConstThermo.H"
+#include "IOstreams.H"
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+template<class EquationOfState>
+Foam::hRefConstThermo<EquationOfState>::hRefConstThermo(Istream& is)
+:
+    EquationOfState(is),
+    Cp_(readScalar(is)),
+    Hf_(readScalar(is)),
+    Tref_(readScalar(is)),
+    Href_(readScalar(is))
+{
+    is.check("hRefConstThermo::hRefConstThermo(Istream& is)");
+
+    Cp_ *= this->W();
+    Hf_ *= this->W();
+    Href_ *= this->W();
+}
+
+
+template<class EquationOfState>
+Foam::hRefConstThermo<EquationOfState>::hRefConstThermo(const dictionary& dict)
+:
+    EquationOfState(dict),
+    Cp_(readScalar(dict.subDict("thermodynamics").lookup("Cp"))),
+    Hf_(readScalar(dict.subDict("thermodynamics").lookup("Hf"))),
+    Tref_(readScalar(dict.subDict("thermodynamics").lookup("Tref"))),
+    Href_(readScalar(dict.subDict("thermodynamics").lookup("Href")))
+{
+    Cp_ *= this->W();
+    Hf_ *= this->W();
+    Href_ *= this->W();
+}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class EquationOfState>
+void Foam::hRefConstThermo<EquationOfState>::write(Ostream& os) const
+{
+    EquationOfState::write(os);
+
+    dictionary dict("thermodynamics");
+    dict.add("Cp", Cp_/this->W());
+    dict.add("Hf", Hf_/this->W());
+    dict.add("Tref", Tref_);
+    dict.add("Href", Href_/this->W());
+    os  << indent << dict.dictName() << dict;
+}
+
+
+// * * * * * * * * * * * * * * * Ostream Operator  * * * * * * * * * * * * * //
+
+template<class EquationOfState>
+Foam::Ostream& Foam::operator<<
+(
+    Ostream& os,
+    const hRefConstThermo<EquationOfState>& ct
+)
+{
+    os  << static_cast<const EquationOfState&>(ct) << tab
+        << ct.Cp_/ct.W() << tab << ct.Hf_/ct.W() << tab
+        << ct.Tref_ << tab << ct.Href_/ct.W();
+
+    os.check("Ostream& operator<<(Ostream& os, const hRefConstThermo& ct)");
+    return os;
+}
+
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/specie/thermo/hRefConst/hRefConstThermo.H b/src/thermophysicalModels/specie/thermo/hRefConst/hRefConstThermo.H
new file mode 100644
index 000000000..9a62231d9
--- /dev/null
+++ b/src/thermophysicalModels/specie/thermo/hRefConst/hRefConstThermo.H
@@ -0,0 +1,233 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 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/>.
+
+Class
+    Foam::hRefConstThermo
+
+Description
+    Constant properties thermodynamics package
+    templated into the EquationOfState.
+
+SourceFiles
+    hRefConstThermoI.H
+    hRefConstThermo.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef hRefConstThermo_H
+#define hRefConstThermo_H
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// Forward declaration of friend functions and operators
+
+template<class EquationOfState> class hRefConstThermo;
+
+template<class EquationOfState>
+inline hRefConstThermo<EquationOfState> operator+
+(
+    const hRefConstThermo<EquationOfState>&,
+    const hRefConstThermo<EquationOfState>&
+);
+
+template<class EquationOfState>
+inline hRefConstThermo<EquationOfState> operator-
+(
+    const hRefConstThermo<EquationOfState>&,
+    const hRefConstThermo<EquationOfState>&
+);
+
+template<class EquationOfState>
+inline hRefConstThermo<EquationOfState> operator*
+(
+    const scalar,
+    const hRefConstThermo<EquationOfState>&
+);
+
+template<class EquationOfState>
+inline hRefConstThermo<EquationOfState> operator==
+(
+    const hRefConstThermo<EquationOfState>&,
+    const hRefConstThermo<EquationOfState>&
+);
+
+template<class EquationOfState>
+Ostream& operator<<
+(
+    Ostream&,
+    const hRefConstThermo<EquationOfState>&
+);
+
+
+/*---------------------------------------------------------------------------*\
+                           Class hRefConstThermo Declaration
+\*---------------------------------------------------------------------------*/
+
+template<class EquationOfState>
+class hRefConstThermo
+:
+    public EquationOfState
+{
+    // Private data
+
+        scalar Cp_;
+        scalar Hf_;
+        scalar Tref_;
+        scalar Href_;
+
+
+    // Private Member Functions
+
+        //- Construct from components
+        inline hRefConstThermo
+        (
+            const EquationOfState& st,
+            const scalar cp,
+            const scalar hf,
+            const scalar tref,
+            const scalar href
+        );
+
+
+public:
+
+    // Constructors
+
+        //- Construct from Istream
+        hRefConstThermo(Istream&);
+
+        //- Construct from dictionary
+        hRefConstThermo(const dictionary& dict);
+
+        //- Construct as named copy
+        inline hRefConstThermo(const word&, const hRefConstThermo&);
+
+        //- Construct and return a clone
+        inline autoPtr<hRefConstThermo> clone() const;
+
+        //- Selector from Istream
+        inline static autoPtr<hRefConstThermo> New(Istream& is);
+
+        //- Selector from dictionary
+        inline static autoPtr<hRefConstThermo> New(const dictionary& dict);
+
+
+    // Member Functions
+
+        //- Return the instantiated type name
+        static word typeName()
+        {
+            return "hRefConst<" + EquationOfState::typeName() + '>';
+        }
+
+        //- Limit the temperature to be in the range Tlow_ to Thigh_
+        inline scalar limit(const scalar T) const;
+
+
+        // Fundamental properties
+
+            //- Heat capacity at constant pressure [J/(kmol K)]
+            inline scalar cp(const scalar p, const scalar T) const;
+
+            //- Absolute Enthalpy [J/kmol]
+            inline scalar ha(const scalar p, const scalar T) const;
+
+            //- Sensible enthalpy [J/kmol]
+            inline scalar hs(const scalar p, const scalar T) const;
+
+            //- Chemical enthalpy [J/kmol]
+            inline scalar hc() const;
+
+            //- Entropy [J/(kmol K)]
+            inline scalar s(const scalar p, const scalar T) const;
+
+
+        // I-O
+
+            //- Write to Ostream
+            void write(Ostream& os) const;
+
+
+    // Member operators
+
+        inline void operator+=(const hRefConstThermo&);
+        inline void operator-=(const hRefConstThermo&);
+
+
+    // Friend operators
+
+        friend hRefConstThermo operator+ <EquationOfState>
+        (
+            const hRefConstThermo&,
+            const hRefConstThermo&
+        );
+
+        friend hRefConstThermo operator- <EquationOfState>
+        (
+            const hRefConstThermo&,
+            const hRefConstThermo&
+        );
+
+        friend hRefConstThermo operator* <EquationOfState>
+        (
+            const scalar,
+            const hRefConstThermo&
+        );
+
+        friend hRefConstThermo operator== <EquationOfState>
+        (
+            const hRefConstThermo&,
+            const hRefConstThermo&
+        );
+
+
+    // IOstream Operators
+
+        friend Ostream& operator<< <EquationOfState>
+        (
+            Ostream&,
+            const hRefConstThermo&
+        );
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#include "hRefConstThermoI.H"
+
+#ifdef NoRepository
+#   include "hRefConstThermo.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/thermophysicalModels/specie/thermo/hRefConst/hRefConstThermoI.H b/src/thermophysicalModels/specie/thermo/hRefConst/hRefConstThermoI.H
new file mode 100644
index 000000000..c6a699540
--- /dev/null
+++ b/src/thermophysicalModels/specie/thermo/hRefConst/hRefConstThermoI.H
@@ -0,0 +1,277 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 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/>.
+
+\*---------------------------------------------------------------------------*/
+
+// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
+
+template<class EquationOfState>
+inline Foam::hRefConstThermo<EquationOfState>::hRefConstThermo
+(
+    const EquationOfState& st,
+    const scalar cp,
+    const scalar hf,
+    const scalar tref,
+    const scalar href
+)
+:
+    EquationOfState(st),
+    Cp_(cp),
+    Hf_(hf),
+    Tref_(tref),
+    Href_(href)
+{}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+template<class EquationOfState>
+inline Foam::hRefConstThermo<EquationOfState>::hRefConstThermo
+(
+    const word& name,
+    const hRefConstThermo& ct
+)
+:
+    EquationOfState(name, ct),
+    Cp_(ct.Cp_),
+    Hf_(ct.Hf_),
+    Tref_(ct.Tref_),
+    Href_(ct.Href_)
+{}
+
+
+template<class EquationOfState>
+inline Foam::autoPtr<Foam::hRefConstThermo<EquationOfState> >
+Foam::hRefConstThermo<EquationOfState>::clone() const
+{
+    return autoPtr<hRefConstThermo<EquationOfState> >
+    (
+        new hRefConstThermo<EquationOfState>(*this)
+    );
+}
+
+
+template<class EquationOfState>
+inline Foam::autoPtr<Foam::hRefConstThermo<EquationOfState> >
+Foam::hRefConstThermo<EquationOfState>::New(Istream& is)
+{
+    return autoPtr<hRefConstThermo<EquationOfState> >
+    (
+        new hRefConstThermo<EquationOfState>(is)
+    );
+}
+
+
+template<class EquationOfState>
+inline Foam::autoPtr<Foam::hRefConstThermo<EquationOfState> >
+Foam::hRefConstThermo<EquationOfState>::New(const dictionary& dict)
+{
+    return autoPtr<hRefConstThermo<EquationOfState> >
+    (
+        new hRefConstThermo<EquationOfState>(dict)
+    );
+}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class EquationOfState>
+inline Foam::scalar Foam::hRefConstThermo<EquationOfState>::limit
+(
+    const scalar T
+) const
+{
+    return T;
+}
+
+
+template<class EquationOfState>
+inline Foam::scalar Foam::hRefConstThermo<EquationOfState>::cp
+(
+    const scalar p,
+    const scalar T
+) const
+{
+    return Cp_;
+}
+
+
+template<class EquationOfState>
+inline Foam::scalar Foam::hRefConstThermo<EquationOfState>::ha
+(
+    const scalar p, const scalar T
+) const
+{
+    return Cp_*(T-Tref_) + Href_ + Hf_;
+}
+
+
+template<class EquationOfState>
+inline Foam::scalar Foam::hRefConstThermo<EquationOfState>::hs
+(
+    const scalar p, const scalar T
+) const
+{
+    return Cp_*(T-Tref_) + Href_ ;
+}
+
+
+template<class EquationOfState>
+inline Foam::scalar Foam::hRefConstThermo<EquationOfState>::hc() const
+{
+    return Hf_;
+}
+
+
+template<class EquationOfState>
+inline Foam::scalar Foam::hRefConstThermo<EquationOfState>::s
+(
+    const scalar p, const scalar T
+) const
+{
+    return Cp_*log(T/Tstd) + EquationOfState::s(p, T);
+}
+
+
+// * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
+
+template<class EquationOfState>
+inline void Foam::hRefConstThermo<EquationOfState>::operator+=
+(
+    const hRefConstThermo<EquationOfState>& ct
+)
+{
+    scalar molr1 = this->nMoles();
+
+    EquationOfState::operator+=(ct);
+
+    molr1 /= this->nMoles();
+    scalar molr2 = ct.nMoles()/this->nMoles();
+
+    Cp_ = molr1*Cp_ + molr2*ct.Cp_;
+    Hf_ = molr1*Hf_ + molr2*ct.Hf_;
+}
+
+
+template<class EquationOfState>
+inline void Foam::hRefConstThermo<EquationOfState>::operator-=
+(
+    const hRefConstThermo<EquationOfState>& ct
+)
+{
+    scalar molr1 = this->nMoles();
+
+    EquationOfState::operator-=(ct);
+
+    molr1 /= this->nMoles();
+    scalar molr2 = ct.nMoles()/this->nMoles();
+
+    Cp_ = molr1*Cp_ - molr2*ct.Cp_;
+    Hf_ = molr1*Hf_ - molr2*ct.Hf_;
+}
+
+
+// * * * * * * * * * * * * * * * Friend Operators  * * * * * * * * * * * * * //
+
+template<class EquationOfState>
+inline Foam::hRefConstThermo<EquationOfState> Foam::operator+
+(
+    const hRefConstThermo<EquationOfState>& ct1,
+    const hRefConstThermo<EquationOfState>& ct2
+)
+{
+    EquationOfState eofs
+    (
+        static_cast<const EquationOfState&>(ct1)
+      + static_cast<const EquationOfState&>(ct2)
+    );
+
+    return hRefConstThermo<EquationOfState>
+    (
+        eofs,
+        ct1.nMoles()/eofs.nMoles()*ct1.Cp_
+      + ct2.nMoles()/eofs.nMoles()*ct2.Cp_,
+        ct1.nMoles()/eofs.nMoles()*ct1.Hf_
+      + ct2.nMoles()/eofs.nMoles()*ct2.Hf_,
+        ct1.nMoles()/eofs.nMoles()*ct1.Tref_
+      + ct2.nMoles()/eofs.nMoles()*ct2.Tref_,
+        ct1.nMoles()/eofs.nMoles()*ct1.Href_
+      + ct2.nMoles()/eofs.nMoles()*ct2.Href_
+    );
+}
+
+
+template<class EquationOfState>
+inline Foam::hRefConstThermo<EquationOfState> Foam::operator-
+(
+    const hRefConstThermo<EquationOfState>& ct1,
+    const hRefConstThermo<EquationOfState>& ct2
+)
+{
+    EquationOfState eofs
+    (
+        static_cast<const EquationOfState&>(ct1)
+      - static_cast<const EquationOfState&>(ct2)
+    );
+
+    return hRefConstThermo<EquationOfState>
+    (
+        eofs,
+        ct1.nMoles()/eofs.nMoles()*ct1.Cp_
+      - ct2.nMoles()/eofs.nMoles()*ct2.Cp_,
+        ct1.nMoles()/eofs.nMoles()*ct1.Hf_
+      - ct2.nMoles()/eofs.nMoles()*ct2.Hf_
+    );
+}
+
+
+template<class EquationOfState>
+inline Foam::hRefConstThermo<EquationOfState> Foam::operator*
+(
+    const scalar s,
+    const hRefConstThermo<EquationOfState>& ct
+)
+{
+    return hRefConstThermo<EquationOfState>
+    (
+        s*static_cast<const EquationOfState&>(ct),
+        ct.Cp_,
+        ct.Hf_,
+        ct.Tref_,
+        ct.Href_
+    );
+}
+
+
+template<class EquationOfState>
+inline Foam::hRefConstThermo<EquationOfState> Foam::operator==
+(
+    const hRefConstThermo<EquationOfState>& ct1,
+    const hRefConstThermo<EquationOfState>& ct2
+)
+{
+    return ct2 - ct1;
+}
+
+
+// ************************************************************************* //