Experimental Study Performance R-22 AC Split Retrofitted With Propane Imam Ridwan Tanaka, Berkah Fajar, Tony Suryo Utomo, Eflita Yohana and Mustaqim MATEC Web of Conferences, 159 (2018) 02021 Published online: 30 March 2018 DOI: 10.1051/matecconf/201815902021