[summner]

Sounds weirdly out of date.

In Poland in early 90ies your story could sound likely. Since then most places using central heating will bill you for "calories" consumed.

Since then a lot of investment went into insulation and replacing windows. I barely know anyone who doesn't have "new" windows, even in less affluent household, window replacement and insulation is a highly prioritized expense.

Actually it has caused some problems with too much humidity in the buildings.

I would assume baltic states are mostly similar since you folks are not swimming in free energy afaik too. So your case sounds like a bit weird outlier.