from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a mechanical system in a building that provides fresh air
Sorry, no etymologies found.
From there it was a short jump across a twenty-meter drop to the top of the conjoined air recycling and composting ventilation system that served the sprawling apartment complex below.
Like everything else on the ship, the Barsoom’s ventilation system is overbuilt and redundant.
The local ventilation system was still functioning or they would have already suffocated, but if vital fans or ducts were destroyed, the air could turn unbreathable rapidly.