Another automatic option for achieving these air quality goals is to use an HRV/ERV for continuous fresh air in the house, as they do in Passive House construct

Another automatic option for achieving these air quality goals is to use an HRV/ERV for continuous fresh air in the house, as they do in Passive House construction. Doing heat exchange between the outgoing and incoming air makes it a very energy efficient system. https://en.wikipedia.org/wiki/Heat_recovery_ventilation https://en.wikipedia.org/wiki/Heat_recovery_ventilation https://www.zehnderamerica.com/heat-recovery-ventilator/ https://www.zehnderamerica.com/heat-recovery-ventilator/