One of the bedrooms, not sure if the bed is in the original position but not how close it is to the fireplace on the bottom right.
But those bedroom fireplaces were never used, were they? Except maybe if you were being nursed in bed for some time.
I was brought up in a house with coal fires, and built after gas and electricity were also available for heating. But there was no gas in the bedrooms, and we never had electric heaters unless ill in bed. At least not to start with, in the 50s - things got a bit more sybaritic in the 60s.
So maybe there was ice on the inside of the windows occasionally, so what? Mind you, I'm not in the least nostalgic for that. And as for chilblains ...