Top panel: outflow momentum boost divided by the AGN radiation momentum rate (L_bol/c) as a function of v_50, wing. The dashed line marks the expectations for a momentum conserving outflow (Ṗ_OF/Ṗ_rad = 1). Middle panel: wind mass outflow rate as a function of the AGN bolometric luminosity. Bottom panel: total outflow kinetic power vs. AGN bolometric luminosity. The grey points represent the data collected by Fiore et al. (2017); the dashed line represents the relation Ė_kin = 0.5% L_bol, above which an energy-driven outflow can substantially heat or blow the galactic gas out. The open symbols correspond to sources without detected extended outflow.