Abstract
In this study , a solar collector has been costructed by using prous media (emery) as absorbeing and storing surface. The solar collector is inclined of ( ) of the horizon. Heat is absorbed from the solar collector by forced convection of air. The solar collector was applied on building with dimensions (10 x 7 x 2.5 m ).The solar collector has been studied in the active system. This has shown that it is of a medium performance that it gives the highest rate of solar heat fraction ( SHF) about (0.52), which is a less value than what is neede, so the solar collector needs a high auxiliary heater to keep the hall temperature at (18 oC).