No thermostat -- we heat primarily with a 30 year old Fisher Grampa Bear woodstove.

Do have an oil-filled electric radiator to sometimes use to warm up the bathroom (haven't used it for the past two winters) and, while we HAVE an oil furnace, we don't have ductwork installed (yet -- the house was built in the late '70s and isn't finished yet), but we run it with the cellar door open (opens to the central part of the house) when necessary.

We have major climate changes from room to room and floor to floor, actually.

Linn