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I Forge Iron

Gas Forge


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Well if you don't let the exhaust out you can't put more fuel and air in. If you are knife forging you tend to run it more reducing too to cut back on scaling and decarburization and that makes for a more *visible* plume of hot gasses out the door.

You can tweak it for a neutral burn which is more efficient---but beware, just because you can't see the exhaust doesn't mean it isn't there and trying to kill you if you don't ventillate your shop!

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