I think I remember reading that MAPP gas is something like 10 or 15% hotter than Propane which is about 15 or 20% hotter than Propylene.
But my memory is not what it once was.
All of them should burn just as clean as long as the tanks are given an hour to settle after being moved / sloshed around.
HotHeads will always require that the bead stay as far back from the torch face as possible to keep from collecting unburnt fuel and soot.
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The Zombie Apocalypse is Upon Us.
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