Do you have a source for those figures? Given the very low energy usage of a passivhaus, 50 years worth of energy sounds like a good deal. But perhaps it would

Do you have a source for those figures? Given the very low energy usage of a passivhaus, 50 years worth of energy sounds like a good deal. But perhaps it would be more useful to compare like for like. How many kWh do we need to erect a passivhaus and operate is, vs a non-passivhaus? I was also under the impression that many passivhaus implementations made heavy use of wood, and thus end up sequestering carbon for the lifetime of the building, but I don't know if that's mandated by the standard or just a preference of some builders.