Mark P Posted July 14, 2011 Report Posted July 14, 2011 the white powdery stuff that collects inside the bottom of furnaces. Click to Enlarge 60.08 KB
Robert Jones Posted July 14, 2011 Report Posted July 14, 2011 Is that the pic you really intended to post? Without seeing the pic, I would go with exhaust condensate.
Richard Moore Posted July 14, 2011 Report Posted July 14, 2011 Dried flue gas condensate. To get condensate, just add water. []
Marc Posted July 14, 2011 Report Posted July 14, 2011 Zinc Oxide? From the reaction of NOx compounds with the zinc in the galvanized flue? Marc
Brandon Whitmore Posted July 15, 2011 Report Posted July 15, 2011 White powdery residue/ substance. Exhaust particulate matter/ residue.
Mark P Posted July 15, 2011 Author Report Posted July 15, 2011 I uploaded the correct picture. Sorry for the confusion - only 2 more days till I go on vacation!
Jim Katen Posted July 15, 2011 Report Posted July 15, 2011 the white powdery stuff that collects inside the bottom of furnaces. I call it white powdery stuff.
plummen Posted August 25, 2011 Report Posted August 25, 2011 Burned up heat exchanger,or the coating inside heat exchanger burning off
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