I don't understand those people who won't put the heating on in summer. There are bloody loads of them about. People for whom it is against the law to heat their houses between May and October. I reckon I'm well and truly in the minority going by the rule that if it's cold you just crank the heating up. Even if it IS the end of July and you should, by rights, be wafting round in a bikini. We live in Britain and the weather is generally a bit crap.
Anyway. It's been flipping freezing this week. The heating is ON.