Cuppatea - I know exactly where you're coming from. I miss the convenience of a central heated house and double glazing. The house we live in isn't too bad if its a nice sunny day.
I don't run any electric heaters unless I have too usually for overseas guests

I run the dehumidifiers in the bedroom. If I'm cold and its after 7.30pm I stick a jumper on before then I'll light a fire that does heat most of the house.
Since living over here I haven't had as many colds etc.. which is great and I put it down to the fact that I'm not constantly moving from really a hot environments to a cold one.