In an energy model, each surface mu

In an energy model, each surface must have a construction assigned. The construction determines the heat transfer through that surface. A construction set can be applied to an entire building, a story, a space type, or an individual space. Usually a majority of the exterior walls in a building will share the same construction. You can assign the exterior wall construction on the building level and that construction will be applied to all exterior walls. This will be the default construction, but you can still edit surfaces and subsurfaces that differ from the defaults.