| Wandtechnik | fire protection method, e.g. erection of a fire protection wall |
| Wärmebildkamera | thermal imaging camera |
| Warneinrichtung | warning device |
| Warneinrichtungsprüfung- | warning device test |
| Warnsignalprüfung | warning signal test |
| Wartung | maintenance |
| Wartungsintervall | maintenance interval |
| Wäschetrockner | linen drier (in workshops for respiratory protective equipment) |
| Waschmaschine | washing machine (in workshops for respiratory protective equipment) |
| Wassertrupp | water squad |
| Wegeunfall | commuting accident |
| Wehrführer | fire chief |
| weiße Blutkörperchen | white blood cells |
| Weiterreißfestigkeit | resistance to tear propagation |
| wesentlicher Bestandteil Persönlicher Schutzausrüstung | essential part of personal protective equipment |
| Widerstand gegen Entflammung | resistance against inflammability (chemical protective suit) |
| Widerstand gegen Flammeinwirkung | resistance against flames |
| Widerstand gegen Penetration | resistance against penetration |
| Widerstand gegen die Permeation | resistance against permeation |
| wiederverwendbare Chemikalienschutzanzüge | reusable chemical protection suits |
