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[Abridged] Enormous observational efforts have been made to constrain theenergetics of AGN feedback by mapping the kinematics of the ionized gas on kpcscale. We study how the observed kinematics and inferred energetics areaffected by beam smearing of a bright unresolved NLR due to seeing. We analyseIFU spectroscopy of a sample of twelve QSOs initially presented by Liu et al.(2014). The PSF for the observations is directly obtained from the lightdistribution of the broad Hb line component. We are able to compare the ionizedgas kinematics and derived energetics of the total, spatially extended, andunresolved [OIII] emission. We find that the spatially resolved [OIII] linewidth on kpc scales is significantly narrower than the one before PSFdeblending. The ENLRs appear offset from the QSO position or more elongatedwhich can be interpreted in favour of a conical outflow on large scales while aspherical geometry cannot be excluded for the unresolved NLR. We find that thekinetic power at 5kpc distance from the spherical model by Liu et al. (2013) isreduced by two magnitudes for a conical outflow and one magnitude for theunresolved NLR after PSF deblending. This reduced kinetic power corresponds to0.01-0.1% of the bolometric AGN luminosity. This is smaller than the 5-10%feedback efficiency required by some simulations to reproduce the massivegalaxy population. The injected momentum fluxes are close or below the simpleradiation-pressure limit Lbol/c for the conical outflow model for the NLR andENLR when beam smearing is considered. IFU spectroscopy is a powerful tool toinvestigate the energetics of AGN outflows, but the impact of beam smearing hasto be taken into account. For the majority of observations in the literature,this has not been addressed carefully so that the incidence and energetics ofpresumed kpc-scale AGN-driven outflows still remain an unsolved issue.

Large-scale outflows in luminous QSOs revisited: The impact of beam smearing on AGN feedback efficiencies