air duct

American  

noun

1. an enclosure, usually of sheet metal, that conducts heated or conditioned air.

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Etymology

Origin of air duct

First recorded in 1865–70

Example Sentences

The same is true for keeping air ducts clean.

From MarketWatch

When hydrogen had built up in the unit 3 building, it had backed up into unit 4, too, and been sparked into an explosion in the air ducts on the building’s fourth floor.

From Literature

Most attributed the improvement in smell to the passage of time, cleaning surfaces and air ducts, replacing furnace filters, and removing carpet, textiles and furniture from the home.

From Salon

An air duct cleaning addresses all aspects of your system that air crosses over and can improve air quality and efficiency.

From Seattle Times

He recounted how lightning struck a pond near their Wilmington home, struck a wire and entered their residence through air ducts.

From Washington Times