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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 gregmac on Tuesday January 22, 2019 @03:02AM (#18966757)
Heat recovery ventilators [1] are reasonably common in Canada. Most (all?) EnergyStar homes [2] have one, and they includes most if not all the houses I've looked at (or friends have bought) in the past decade or so.

I lived in a house built around 1985 that had one, which was R-2000 [3], so they're at least that old.

[1] https://en.m.wikipedia.org/wiki/Heat_recovery_ventilation

[2] https://www.nrcan.gc.ca/energy/efficiency/housing/new-homes/...

[3] https://www.nrcan.gc.ca/energy/efficiency/homes/20575

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Re:On whether changes in bedroom CO2 levels affect sleep qua... by gregmac on Tuesday January 22, 2019 @08:28AM (#18968075)
Oops, I meant houses that were built in the last ~decade are mostly EnergyStar.
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