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A comment on On whether changes in bedroom CO2 levels affect sleep quality. Parent comment

Re:On whether changes in bedroom CO2 levels affect sleep qua... by throw0101a on Tuesday January 22, 2019 @01:53PM (#18971122)
You're not wrong, but one can mitigate energy loss with an HRV (or ERV) and get fresh air in a controlled manner:

* https://en.wikipedia.org/wiki/Heat_recovery_ventilation

With the added bonus that the air can be filtered as well, instead of coming in as-in through leakage.

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