Venting over the range exhaust

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slownsteady said:
Are you calculating area in the cabinet or cubic in. in the pipe?
Your installation could have as much to do with the 90s as with the pipe diameter, and you didn't tell us the size of the unit, so YMMV.
Click to expand...

What do want to know about the size of my unit?:confused:

Size does matter and yes mine would calculate as 13 ft with the 90*s
32.5 sq. inches is what you have with the micro wave over the stove so changing to 4" cuts the sq. inches to almost a third. Anytime it is straight forward and easy, go with 6"
 
as long as you have the 32.6 sq inch. it does not have to be round. it can be rectangle.or square
2x16=32

4x8=32


we use 3x14 inside wall cavities often when space is critical
 
Somehow I got the impression that the exit from the OTR was round - probably from the video :confused:. if it is rectangular, then it's my bad. But I still stand by my point about the book being the authority on what size to use.

Neal: I hope your unit is not rectangular, but other than that, it's none of my bizness:hide:
 
jeeezzzzz...ever hear of a transition ?

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