Abstract: Structural wall panels and methods and systems for controlling the interior temperature of a building are provided. The structural wall panels advantageously include a fluid conduit disposed within an interior concrete layer of the structural wall panel where the conduit is adapted to convey a thermal transfer fluid through the interior concrete layer. A thermal insulation layer is provided between the first concrete layer and a second concrete layer, which can be disposed on an exterior surface of the wall. The thermal transfer fluid can be heated and/or cooled to regulate the temperature of the interior concrete layer and thereby control the temperature of the interior of the building. The first concrete layer can have a high thermal mass to increase the efficiency of the system.