[throw0101a]

> I'm all for cleaner air and I don't doubt that the already well-established negative effects of high CO2 or VOC concentrations on us, but can we at least keep any discussion to non-anecdotal, strong scientific evidence?

They're so well established that there are industry guidelines, ASHRAE 62.1 and 62.2:

* https://www.ashrae.org/technical-resources/bookstore/standar...

Pull/return air from places like bathrooms and kitchens, and supply air to (e.g.) bedrooms, and in between temper the filtered, fresh air you bring in from the outside with an HRV/ERV:

* http://www.mnshi.umn.edu/kb/scale/hrverv.html

Renovating this into an older building which has less room for equipment could be a challenge though.