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In Tombesi et al., we reported the first direct evidence for a quasar accretion disk wind driving a massive (> 100 M⊙ yr− 1) molecular outflow. The target was F11119+ 3257, an ultraluminous infrared galaxy (ULIRG) with unambiguous type 1 quasar optical broad emission lines. The energetics of the accretion disk wind and molecular outflow were found to be consistent with the predictions of quasar feedback models where the molecular outflow is driven by a hot energy-conserving bubble inflated by the inner quasar accretion disk wind. However, this conclusion was uncertain because the mass outflow rate, momentum flux, and mechanical power of the outflowing molecular gas were estimated from the optically thick OH 119 μm transition profile observed with Herschel. Here, we independently confirm the presence of the molecular outflow in F11119+ 3257, based on the detection of∼±1000 km s− 1 blue-and redshifted …