Abstract: A heating system for heating a building includes a solar energy collector. The collector is constructed from a plurality of glass panels. A first group of glass panels are mounted in an inverted pyramid with mirror surfaces to reflect solar energy to the base of the pyramid. A second group of transparent panels form an upright pyramid which is joined with the first pyramid at the base. A collector coil containing a circulating liquid is mounted at the junction of the bases of the two pyramids to collect solar energy which passes through the transparent upper pyramid and which is also reflected from the inverted pyramid. Water or other fluid is circulated through the collector coil and stored in an insulated storage tank. Thermostatic control is used to control the circulation of the heating fluid in accordance with the temperature. The heating fluid is pumped from the storage tank to various use devices such as baseboard radiators, water heaters and other devices which require heat.