Evaluation of the economic feasibility of using common materials in the external wall of a standard building in the Region of Tehran

In this study, a standard building has been simulated with carrier software. Energy saving and economic issues, arising from insulation, were discussed. By modeling the sample space ASHRAE Standard No. 600 in Tehran weather, the heating and cooling load of the building annual consumption is calculated by using proposed external wall materials. Besides, the amount of Heating and cooling energy savings, achieved with this insulation, was obtained. Wall insulation costs including labor, transportation and other expenses were also calculated. Finally, the break-even time to the spending costs were calculated and for insulation of external walls found to be about 1.5 years after investment. Also for the most frugal insulation, Western Wall with Heblex suggested insulation, the payback period is 13 months which is reasonable.