[hx87]

> It's amazing if Finland has solved poverty to the level that every household can afford to set aside the space for a sauna and costs of running it.

If you live in an apartment building, not every unit has a sauna--there is one shared across several units. If you live in a detached house, having a small sauna doesn't take up much space, and since it's so small and only used for an hour a day (if that), it's cheap to heat.

> In the UK heat poverty is a widespread problem due to the costs of heating fuels.

Based on my experiences in the UK, it's not heating fuel costs that's the problem, it's the sheer ubiquity of poorly insulated and air-sealed brick (and in Scotland, stone) houses with leaky single-pane sash windows.