.TransiEnt.Components.Heat.ElectricAirHeater.ElectricAirHeater_L4.HeatTransferExternal .TransiEnt.Components.Heat.ElectricAirHeater.ElectricAirHeater_L4.HeatTransferExternalmodel HeatTransferExternal = ClaRa.Basics.ControlVolumes.Fundamentals.HeatTransport.Generic_HT.Constant_L4;