> I remember that it took at least a couple of days to come up to a stable temperature

Funny, the doc says 2-3 hours.

That would be with coke, the modern AGAs are electric and definitely took more than a day before they were at temperature

	▲	Wistar 3 days ago \| parent [-]
		My friend’s Aga was natural gas. I remember him saying it cost very little to run (early 1990s). I doubt that is still true today.