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Posted by Harold hydronicnetwork.net on February 22, 2004 at 07:21:40:
In Reply to: how do I operate a Heat Exchanger posted by Martin on February 22, 2004 at 04:54:54:
It is supposed to save fuel by taking the heat that is left in the flue after the furnace uses what it can. It is a bad idea, because it reduces the flue gas temperature that drives the flue gases up the chimney and can cause draft problems. It is an obsolete artifact left over from 40 years ago.
If the furnace is so badly constructed that it can not extract the heat to the home on its own, it should be replaced. As almost all today's oil furnaces are better than 84 percent efficient, there is no longer a place in this world for such an exchanger, as it can only make serious draft and condensation problems.
Remove it to be replaced by a good piece of sheetmetal vent.
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