I hear all you say!
We have double-glazing everywhere, but have to fix bad drafts/leaks in the bathroom window (which has the mitigating virtue of reducing condensation at the moment).
In general we're a still a long way from sealing everything tight, but I am definitely thinking of some heat-exchanged fresh air if we get close...
I am aiming for body heat and solar gain to cover most space heating needs eventually.
Rgds
Damon[ Parent ]
Ventilation.
Wind induced ventilation, no motors, in / out vents form a heat exchanger. Humidity is not preserved. To preserve humidity is called entropy ventilation. More costly.
Have fun, Scott.[ Parent ]