A portable heating system, comprising: - an air inlet (2,3); - a combustion chamber for combustion of fuel; - a burner connected to said air inlet, said burner comprising a fuel inlet for introducing fuel to said burner, - a combustion blower for blowing air from the air inlet into said combustion chamber thereby allowing for production of heat by combustion of said fuel and - an outlet for releasing exhaust from the combustion chamber; - a heat exchanger (6,7), interfacing the combustion chamber and exchanging heat with a heat transporting media, wherein said heat exchanger is having: - a first side, arranged in such a way as to absorb heat from the combustion chamber and - a second side for releasing heat into the heat transporting media wherein the heat exchanger further comprises: - at least one thermoelectric module arranged in-between the first side and second side of said heat exchanger (6,7) for producing electrical effect; - a rechargeable battery for absorbing the electrical power generated by the at least one thermoelectrical module; Characterized in that the PHS further comprises a control that is configured to monitor the electrical effect generated by the at least one thermoelectric module and configured to regulate the current draw from the at least one thermoelectric module to a level within a preset range of current draw corresponding to a preset range of thermal conductivity of the at least one thermoelectrical module by distribution of the generated electrical effect into selected electrical power consumers arranged with the PHS. - an air inlet (2,3); - a combustion chamber for combustion of fuel; - a burner connected to said air inlet, said burner comprising a fuel inlet for introducing fuel to said burner, - a combustion blower for blowing air from the air inlet into said combustion chamber thereby allowing for production of heat by combustion of said fuel and - an outlet for releasing exhaust from the combustion chamber; - a heat exchanger (6,7), interfacing the combustion chamber and exchanging heat with a heat transporting media, wherein said heat exchanger is having: - a first side, arranged in such a way as to absorb heat from the combustion chamber and - a second side for releasing heat into the heat transporting media wherein the heat exchanger further comprises: - at least one thermoelectric module arranged in-between the first side and second side of said heat exchanger (6,7) for producing electrical effect; - a rechargeable battery for absorbing the electrical power generated by the at least one thermoelectrical module; Characterized in that the PHS further comprises a control that is configured to monitor the electrical effect generated by the at least one thermoelectric module and configured to regulate the current draw from the at least one thermoelectric module to a level within a preset range of current draw corresponding to a preset range of thermal conductivity of the at least one thermoelectrical module by distribution of the generated electrical effect into selected electrical power consumers arranged with the PHS. - a first side, arranged in such a way as to absorb heat from the combustion chamber and - a second side for releasing heat into the heat transporting media wherein the heat exchanger further comprises: - at least one thermoelectric module arranged in-between the first side and second side of said heat exchanger (6,7) for producing electrical effect; - a rechargeable battery for absorbing the electrical power generated by the at least one thermoelectrical module; Characterized in that the PHS further comprises a control that is configured to monitor the electrical effect generated by the at least one thermoelectric module and configured to regulate the current draw from the at least one thermoelectric module to a level within a preset range of current draw corresponding to a preset range of thermal conductivity of the at least one thermoelectrical module by distribution of the generated electrical effect into selected electrical power consumers arranged with the PHS.