Info on fuel sources in archaic setting for novel?

Question:

Info on fuel sources in archaic setting for novel?

I'm not at all sure how to categorize this question, so I'll post it in multiple places and hope someone has some experience in the matter.

Comparatively speaking, what sort of temperature (general feel, not specific numbers), amount of flame (not just glowing embers), length and efficiency of burn, and amount/appearance of ash can be expected when burning blocks of peat, lengths of hardwood, and chunks of anthracite coal? I'm trying to gather info for novel-writing in lower-technology settings, so I'm more interested in sensory input and daily usage (smell, warmth, appearance, practical efficiency) than in scientific figures, though I'll be thankful for any info at all.... :-)

Best Answer - Chosen by Asker:

As for wood, it kind of depends on what you are burning. Pine burns fast and hot, hardwoods burn slower. Softwoods leave more ash. Hedge pops and throws off embers when it burns. Oak is a pretty good wood in a fireplace. Flame depends on airflow, but generally it flames more when it just gets going good, then produces glowing red embers that flame just a bit. For peat and coal, maybe these will help:

http://geology.about.com/od/coal/a/aacoa...
http://www.motherearthnews.com/homestead...