It's this one: https://www.badundenergie.at/standorte/ausstellung-detail/ausstellung/17/Bad-Energie-Ihr-Baederparadies-Klagenfurt-Sued/
I changed it to bathroom furnishing, though they seem to have HVAC stuff too. And changed the shop to a node, as the website indicates the shop may only be in the western part of the building.