Abstract: A built-in solar combination heating and cooling system for a building, particularly a residence, having a sub-floor below grade, walls, one or more ceilings, and a peaked roof comprises a first heat exchange means and a second heat exchange means, where the first heat exchange means absorbs heat from the southerly surface of the roof, and the second heat exchange means exchanges heat from or to the walls, floors, and ceiling of the building, as well as the region below grade surrounding the building. During the heating mode of operation, the path of air is from the outside into the roof-mounted first heat exchange means, then into the second heat exchange means, and into the building through a blower mounted below grade inside the building.