2-Dimensional and 3-Dimensional Temperature Distribution in the simplified chamber are simulated by Fluent Code. Fluent Code is general purpose computer program for modeling of fluid flow, heat transfer and chemical reaction. The forced convection is generated by heater and fan. In this investigation, the Navior-stoke`s equation and standard k-ε model for turbulent heat transfer eq`n is used. In the test site, the simulated temperature Distribution is good agreement with experimental ones.