Isochoric P−V−T−x measurements were performed for the difluoromethane (R32) + 1,1,1,2,3,3-hexafluoropropane (R236ea) and pentafluoroethane (R125) + 1,1,1,2,3,3-hexafluoropropane (R236ea) systems within the 254−364 K temperature range and within the 111−1994 kPa pressure range. Measurements for the R32 + R236ea system were taken for 6 different compositions and 10 expansion series, resulting in 188 data points, 101 of which were within the VLE boundary and 87 of which were in the superheated vapor region. Measurements for the R125 + R236ea system were taken for 4 different compositions and 10 expansion series, for a total of 213 data points, 133 of which were within the VLE boundary and 80 of which were in the superheated vapor region. In all, 346 data points are presented. The VLE parameters were derived from experimental data using a flash method and the Carnahan−Starling−De Santis equation of state (CSD EOS). The dew point parameters were obtained by the interpolation of the P−T isochoric sequence. Data...