A system and method for regulating the temperature of a building interior, the building including at least one thermal mass for receiving and holding heat, distribution vents and an air return, the method including receiving and holding heat in the at least one thermal mass, enabling an air flow from the at least one thermal mass using the distribution vents, and returning the air flow to the at least one thermal mass via the air return, wherein the air flow tends to maintain a generally constant temperature in the building.
