extractor fan

noun

noun

A type of fan designed to remove moisture from a room, or dust or fumes from certain environments.

Injector testing under pressure has never presented any difficulty. It is carried out in a small, dust-free cubicle fitted with an extractor fan and the meter calibration is checked annually.1962 October, M. J. Wilson, “Three years of dieselisation at Devons Road depot”, in Modern Railways, page 264:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.