On Wed, 26 Jun 2019 20:31:29 +0200
Axel Berger  wrote:

> NY wrote:
> > if you actually lived/slept in that flat.
>
> The room I sleep in gets below zero in winter. But admittedly, when I
> wake up I go to where it's warmer and close the door behind me, so my

 Ugh nasty, I took some pains to arrange that my house is warm
throughout after growing up in places like that. The funny thing is that
when you insulate and ventilate[1] well enough[2] to achieve that you use
less fuel than having some bits warm and some freezing.

[1] ie. via an air/air heat exchanger.
[2] Granted this is hard (up to impossible) to do as a retrofit

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