alt Hacker NewsBut any modern house is too airtight and essentially requires ERV.
Which brings us to next interesting problem - you would think that ERV should be built-in into modern cooling/heating systems, but it’s no the case.
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defineERV • yesterday at 6:51 PM
ERV = Energy Recovery Ventilator
Yes, it's one of the cheapest way to reduce your energy needs and have clean air, plus it's fairly low tech system