Abstract: A solar heating system for a building is disclosed. The solar heating system includes a solar collector and conduits leading from the solar collector to a plurality of heat sinks. The conduits contain an antifreeze solution for carrying the heat from the solar collector to the heat sinks. One of the heat sinks is a hot water stock tank which is heated by coils of the conduit containing the antifreeze solution. Therefore, the hot water in the stock tank is only indirectly heated by solar energy. Other heat sinks include hot air space heaters in each room and a heat accumulation tank through which air may be passed for heating the air which is circulated to the rooms of the building. The building and the hot water stock tank are both well insulated.