This paper presents experimental study of supported mixed convection of two-dimensional wall jet over various thermal activation lengths of vertical TABS. It was found out that supported mixed convection upward the jet over vertical TABS is not influenced by thermally inactivated vertical TABS downwards of the wall jet. Practical consequences of this founding were after that tested using TRNSYS simulation tool in energy simulation study for contemporary modern office room having vertical TABS. Results show that office room can be sufficiently cooled by mixed convection even for TABS designs where only upper half of room wall is thermally activated by environmental high temperature cooling sources. (C) 2014 Elsevier B.V. All rights reserved.