[fiat_fandango]

Fortunately systems for bringing in "fresh" air without dumping heat (by means of a heat exchanger) now exist which basically removes the issue of indoor air quality / Co2 and VOC buildup in highly insulated homes. However, circulation is essential.

The biggest issue that still arises in highly insulated homes is moisture buildup. Even with ample air circulation, modern building techniques at large have accepted having a home that "breathes" is more important to prevent dangerous / destructive mold from growing in enclosed airspaces / under siding etc.

Also, "high performance" homes in most of the country, especially the east coast are at least 1.8x to 2.5x as expensive as the average builder home. This is simply not accessible even to relatively financially equipped home buyers.

That said, my current apt is incredibly well insulated and in comparison to my parent's home it's wild how much more efficient my dwelling is. At times in the winter I barely use my heat pump for days at a time to keep my home comfortable.