In this work, experimental values of gas solubility of hydrofluorocarbons (CHF 3 , CH 2 F 2 and CH 3 F) in three room-temperature ionic liquids (RTILs) were determined within the temperature range 288K to 308K and at atmospheric pressure. The RTILs used were trihexyltetradecylphosphonium chloride ([P 6,6,6,14 ][Cl]), tributyl(methyl)phosphonium methylsulfate ([P 4,4,4,1 ][C 1 SO 4 ]), and tributyl(ethyl)phosphonium diethylphosphate ([P 4,4,4,2 ][(C 2 ) 2 PO 4 ]). The data gathered have been modelled using two approaches: the Cubic plus Association equation of state (CPA EoS) and the regular-solution theory (RST). The experimental measurements were then discussed critically and the modelling results compared.