| F | Sektion F — Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen | MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING | |
 | F24 | Heizung; Herde; Lüftung | HEATING; RANGES; VENTILATING |
| F24T | Erdwärmekollektoren; Erdwärmesysteme [2018.01] | GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS [2018.01] |