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A comment on The experiment that proved airborne disease transmission. Parent comment

Re:The experiment that proved airborne disease transmission by treis on Saturday October 03, 2020 @10:11PM (#24676100)
>Just vent it out in the open air and not on people

Terrible for energy efficiency

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Re:The experiment that proved airborne disease transmission by jaggederest on Sunday October 04, 2020 @06:47AM (#24677905)
That's what an ERV or HRV is for: https://en.wikipedia.org/wiki/Energy_recovery_ventilation https://en.wikipedia.org/wiki/Heat_recovery_ventilation

Et voilà, now it's no longer terrible for efficiency since you're recovering 70-90% of the energy. For fixed-plate exchangers there's no cross-contamination, either.

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