Potential of HVAC and solar technologies for hospital retrofit to reduce heating energy consumptionOctavian G. Pop, Ancuta C. Abrudan, Dan S. Adace, Adrian G. Pocola and Mugur C. BalanE3S Web Conf., 32 (2018) 01016DOI: https://doi.org/10.1051/e3sconf/20183201016