You wouldn't survive in Scotland then! Even in the height of our summers the average temperature inside our house rarely exceeds 19C unless the central heating is put on to assist, and in the winters we struggle to reach 19C even with the heating turned on! (We live in a 120 year old house with high ceilings etc). As it happens, I can't stand central heating, it blocks my sinuses. So I make do with the passive heat I get from my amps, plasma TV, computers, etc and sit with a blanket over my legs!