Improving the energy efficiency and operation of a listed 1960‘s school building by Prof. Fred Angerer.After a detailed initial survey the following measures were implemented;Replacement of the north facade, the cellar windows and main entrance lobby with triple glazed steel windows; replacement of the whole lighting system and of the sun-shading (due to over heating); insulation to the cellar ceiling in the two basement levels, as well as the roof; fire-protection linings in the canteen and replacement of the fire alarm system.