This is an optional step in the navigator and is linked to the HVAC system of the Design model only. User can select Title 24 compliant or non-compliant HVAC system(s), through “HVAC System Design Wizard,” by clicking on the “Create new HVAC System(s) from Design model” in the navigator. Furthermore, the user can edit/customize the imported system by clicking the “Edit existing HVAC file for Design model” in the navigator.