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Posted by Harold Kestenholz - hydronic.net on January 21, 2002 at 11:22:08:
In Reply to: What would make the furnace keep surging?? posted by Larry P on January 21, 2002 at 08:50:56:
Gross incomplete combustion upon entry of the fuel into the furnace (fire chamber), then mixing of the remaining unburned fuel with secondary combustion air will cause a puffing explosion within the furnace combustion chamber that can eventually knock masonry walls down or bulge sheetmetal walls.
Surging within a boiler pressure vessel is another question.
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