I was reading my furnace manual and I came across this. It says
for my upflow furnace, a Carrier 30 y.o. oil burner (no boiler), model
"Upflow models are equipped with steel dustpan to hep prevent
distribution of soot and dirt particles through the duct system. "
I though if soot was coming through the ducts, it mean there was a hole
in the firewall. If the fire is on the other side of the firewall, how
can soot be in the ducts? And what kind of dirt particles are they
Less important: What would the "dustpan" look like or where would it
be? I thought I knew all the parts by now.
It also says a few lines earlier, "No-drip nozzle adapter provides
positive fuel cutout to prevent fuel odor and soot problems in the
house." No mention of ducts here, but still. Are they only
referring to combustion gases escaping through the observation port or
the barometric damper? Or do they have the ducts in mind?