Oil draft burnover?

[garrettw]

What is it and what's it measured in? I was asked this in an interview today and had no clue. I answered his other questions correctly and he like me so I got the job and start when I am out of school, but would still like to know the answer. Tried looking it up but found nothing.

[hearthman]

You mean the overfire draft. Generally 0.01-0.02 wci negative pressure. Measured through the inspection port into the combustion chamber. Some units run on a positive overfire pressure. See mfr.
HTH

[beenthere]

Draft over the fire.
Draft over the burner.

Same thing, Hearthman said.

[oil lp man]

Originally posted by garrettw
What is it and what's it measured in? I was asked this in an interview today and had no clue. I answered his other questions correctly and he like me so I got the job and start when I am out of school, but would still like to know the answer. Tried looking it up but found nothing.
It's when the flame shoots out at yer face from the inspection door after the homeowner tells you he only hit the reset button once!!!
LOL