normanwisdom wrote:

The simple tried and tested energy-saving traditional option would be
to leave the windows open a bit, and have a bit of background heating
on if poss. If not poss than open the windows a bit more.

Tried that myself in the early days, but the house got too cold and I'm
not keen on pumping expensive warm air through the windows especially as
windows tend to be up where the warmest air is.
:¬(

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