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Posted by Dee on July 04, 2007 at 18:25:41:
If your boiler typically runs at 170 degrees or any temperature higher than 125, then you need to have a mixing valve for the potable water that is going through the heat exchanger to get it to anti-scalding ??? If this is the case, isn't this a waste of energy? How much does this effect your effiecency? I relealize this may be a charted answer. For instance if you boiler runs at 140 vs 180 or so on.
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