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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 dzhiurgis on Monday January 21, 2019 @09:16PM (#18965500)
How are these different from HRV - Heat recovery ventilation?
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Re:On whether changes in bedroom CO2 levels affect sleep qua... by nkurz on Monday January 21, 2019 @10:09PM (#18965703)
HRV's exchange only heat. ERV's (where E stands for energy or enthalpy) also exchange moisture. One is not strictly bette than the other, it depends on your house and your climate: https://www.greenbuildingadvisor.com/article/hrv-or-erv
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