Heat transfer coefficients in nucleate pool boiling were measured on a horizontal copper surface for refrigerants, HFC-134a, HFC-32, and HFC-125, their binary and ternary mixtures under saturated conditons at 0.9Mpa.Compared to pure components, both binary and ternary mixtures showed lower heat transfer coefficients. This deterioration was more pronounced as heat flux was increased. Experimental data were compared with some empirical and semi-empirical correlations available in literature. For binary mixture, the accuracy of the correlations varied considerably with mixtures and the heat flux. Experimental data for HFC-32/134a/125 were also compared with available correlated equation obtained by Theme. For ternary mixture, the boiling range of binary mixture comportant effects on boiling heat transfer coefficieats.