.ClaRa.Components.HeatExchangers.RegenerativeAirPreheaterPrimaryAndSecondaryAir_L4.PressureLoss .ClaRa.Components.HeatExchangers.RegenerativeAirPreheaterPrimaryAndSecondaryAir_L4.PressureLossmodel PressureLoss = ClaRa.Basics.ControlVolumes.Fundamentals.PressureLoss.Generic_PL.LinearPressureLoss_L4;