Embedment of phase change materials (PCMs) in buildings elements is a technique to lower the heating and cooling demands. In the present study, a frame of entrance doors filled with the PCMs was simulated for a sunny summer day condition of Rafsanjan city in Iran. It was assumed that the frame is subjected to the indoor and outdoor temperature and solar radiation. The simulation was carried out through 2-D finite element method taking into account heat and mass transfer in the PCM. A parametric study was conducted to investigate the type of PCMs, the volume PCMs as well as their positions in the frame. The results were compared with a common frame filled with air. The obtained findings showed that RT-25 is more effective than capric acid, paraffin and P116. Maximum reduction of heat flux was observed to be 37.72% for the frame filled with RT-25 when its outside walls were in contact with the PCM. The results also reveal that the incorporation of the PCM is effective for passive thermal storage.