Heating Performance Study on a Passive Solar HeaterMuhammad Y. Naz, Shaharin A. Sulaiman, Tahir Mahmood, Muhammad I. Hussain, Abdul Ghaffar, Yasir Jamil and Muddasser InayatMATEC Web Conf., 131 (2017) 02012DOI: https://doi.org/10.1051/matecconf/201713102012