air exchanger

noun

Definition of air exchanger 

: a ventilation and climate control system or device that exchanges air inside a building with fresh air from outside the building and that typically transfers heat between the outgoing and incoming air in order to reduce the energy required to maintain the building's indoor temperature An air exchanger is often added to the ductwork of tightly built houses that have only minimal ventilation.Ultimate Guide to Home Repair and Improvement, 2006

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First Known Use of air exchanger

1876, in the meaning defined above

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The first known use of air exchanger was in 1876

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