dnvtr@lemm.eetoToday I Learned@lemmy.world•TIL about “passive houses,” building that are airtight and require barely any energy to heat or coolEnglish
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1 year agoGenuine question: if they’re airtight, how do oxygen and CO2 levels remain livable? Spacecraft and submersibles require oxygen supply and CO2 scrubbers to keep occupants alive.
I suppose what trips me up is that my brain sees the concepts of “airtight” and “ventilated” to be in conflict and I am seeking further clarification than what has already been provided.