return air

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. The mechanism in an [[HVAC]] system that pulls [[stale]], [[unconditioned]] air out of a spaces and cycles it back to the [[furnace]] or [[air conditioner]] to be reheated or cooled; it works in a continuous loop with the [[supply vent]]s to regulate indoor air pressure, filter out dust, and maintain even temperatures.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.