5
The following table shows the relationship between the
maximum width of the ellipse (seen between the two arrows in
the picture on page 4 and is the actual opening) and its relation-
ship to the total venting area of the 4 holes. You see that the rela-
tionship is not a one to one basis. One open hole on the Weber is
about 0.60 square inches, and 0.58 is very near one open hole or a
setting of 5/16”. We have found that choking the upper vent to
3/16” will allow a burn to proceed. A common pencil has a di-
ameter of .30”; 5/16” is 0.31 square inch. Once you discover
how damping works in your kettle you can whittle a stick or find
various pencils of varying widths to set your vents.5/16” is your
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