return air

noun

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 vents to regulate indoor air pressure, filter out dust, and maintain even temperatures.

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Meanings

nounreturn air (uncountable)
  1. uncountableThe 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 vents to regulate indoor air pressure, filter out dust, and maintain even temperatures.
Cite this entry
APA

return air. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/return%20air

MLA

“return air.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/return%20air. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “return air,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/return%20air.

Source: return air on Wiktionary, CC BY-SA 4.0.