return air
The mechanism in an HVAC system that pulls stale, unconditioned air out of a spaces…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.
Meaning
1 senses(uncountable)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.
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable