Abstract: A heat storage and delivery apparatus includes a cabinet containing a plurality of heat storage rods which absorbs and stores heat when heated air is directed over the surfaces thereof. A delivery passage and a return passage within the cabinet are adapted to be connected to a heat generator, preferably a solar collector, to permit heated air to be circulated over the heat storage rods. A charging blower and a delivery blower control the flow of air between the solar collector and cabinet, and between the cabinet and the area to be heated. An air distributor effectively distributes air from the charging blower over the heat storage rods. Heat responsive controls operate the charging and delivery blowers in response to changes in temperature in the cabinet, the area to be treated and the solar collector.