> And air quality concerns. You need to ventilate your home with outside air year round. Look up HRV/ERVs. You'll have better air quality by building a tight

> And air quality concerns. You need to ventilate your home with outside air year round. Look up HRV/ERVs. You'll have better air quality by building a tight envelope and using mechanical ventilation because all the air from the outside will flow through filters. It then gets tempered by the exhausted stale air before being circulated. A leaky house and ventilation through windows was fine in the 1920s, but we've better ways now. (And operable windows won't go away: they're mandated for fire egress. So you can crack one open if you wish.)