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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 extrapickles on Tuesday January 22, 2019 @04:51AM (#18967196)
Heat recovery ventilation can bring in fresh air with about half the heat loss, but it needs regular maintenance.

You can also look at whole house dehumidifiers to take the water out of the air to help reduce the mold problem.

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