.ClaRa.Components.HeatExchangers.RegenerativeAirPreheater_L4.HeatTransferFreshAir .ClaRa.Components.HeatExchangers.RegenerativeAirPreheater_L4.HeatTransferFreshAirmodel HeatTransferFreshAir = ClaRa.Basics.ControlVolumes.Fundamentals.HeatTransport.Gas_HT.Convection.Convection_regenerativeAirPreheater_L4;