I'm in the middle of building a PassivHaus. The building itself is mostly done and we're working on the interior. There are still a few gaps that haven't been plugged and the heat exchangers have not yet been installed. I'm above 800m elevation, snowstorms every weekend. It's cold here. My house also actually faces West instead of South, so I'm not getting much heat from the sun. This was a surprise to use because the previous house on the same site had the same orientation and was scorching during the evenings, it's amazing what a pair of Low-E triple paned windows can do.
Despite all that, the builders manage to work inside the building with a single kerosene stove[0]. And the building stays comfortable for several hours even after the stove has been turned off.
Despite all that, the builders manage to work inside the building with a single kerosene stove[0]. And the building stays comfortable for several hours even after the stove has been turned off.
[0]: https://nimmi.jp/kurashi-stove/