A fresh air exchanger in an HVAC system. The fresh external air coming in is [wa... | Hacker News

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throwawayboise on Feb 20, 2021 | parent | context | favorite | on: Why Birds Don’t Get Cold Feet

A fresh air exchanger in an HVAC system. The fresh external air coming in is [warmed|cooled] by the interior air being exhausted.

fy20 on Feb 20, 2021 [–]

Also know as a heat recovery ventilator. If you are building a new house, read up on these, as you probably want one.

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