When the Moist Air version of the predefined Heat and Moisture Transport () interface is added (found under the Heat Transfer branch () of the Model Wizard or Add Physics windows), it combines the Heat Transfer in Moist Air and the Moisture Transport in Air interfaces to model coupled heat and moisture transport in moist air, by modeling moisture transport by vapor diffusion and convection, and heat transfer by conduction and convection with moisture-dependent thermodynamics properties.

As a predefined multiphysics coupling, Heat Transfer in Moist Air and Moisture Transport in Air interfaces are added to the Model Builder. In addition, a Multiphysics node is added, which automatically includes the Heat and Moisture multiphysics coupling feature.

The Heat Transfer in Moist Air interface provides features for modeling heat transfer by conduction, convection, and radiation. The Moist Air model, active by default in all domains, provides in addition the functionality for moisture content dependency of thermodynamics properties.

The Moisture Transport in Air interface provides features for modeling moisture transfer by vapor convection and diffusion. A Moist Air model is active by default on all domains.

The Heat and Moisture multiphysics coupling is also available when there is at least one of each of the following interfaces with the specified model activated: