Heat exchanger sooting in 90%
multi-poise condensing furnaces can begin to form from
several sources. The two most
common are improper setup and maintenance, and high
sulfur levels in the fuel. The
intent of the following information is to address the operational
changes of the furnace based on
high sulfur levels as well as furnace setup and mainte-
nance. The sources of high
sulfur will also be addressed.
