I'm doing something different this weekend - hitting the books instead of hitting the blogs. I'm reading a splendid edition of "Pompeii and Herculaneum - Cities of Vesuvius" by Michael Grant. It was first published in 1971 - 40 years ago.
From page 91:
"In the absence of fireplaces, charcoal-burning braziers were employed to heat the houses at Pompeii and Herculaneum. Heating presented a severe problem. For it can be perishingly cold at these places, with a strong wind from the north-east; one wonders, looking at houses of such a kind, whether the winter climate must not have been at least a little warmer in antiquity".
Better mark this bloke down as a denier.