The Heat Transfer in Moist Air () interface is automatically added when the Moist Air version of the predefined multiphysics interface Heat and Moisture Transport is added. A Moist Air model is active by default on all domains.

It is used to model heat transfer in moist air by convection and diffusion, by using thermodynamics properties defined as a function of the quantity of vapor in the moist air.

When this physics interface is added, the following default nodes are added in the Model Builder: Moist Air, Thermal Insulation, and Initial Values. Then, from the Physics toolbar, add other nodes that implement, for example, boundary conditions. You can also right-click Heat Transfer in Moist Air to select physics features from the context menu.