I changed limit switch with factory replacement 250 Degree unit. Within a few days I had another trip...
Checked the flue - no blockage
Could not find specifications for XE80 unit (tonage/cfm) to check against existing duct work sizing. I got the math skills...just don't got the data.
Ditto for normal gas consuptions rates to clock the meter.
A source for this data would be helpful.