Ask Boiler or System Questions. Leave CommentsArea of Round Duct
To determine the sq inches (area) of a duct or circle, use the following formula
Area = Pi(r2)
Example.... Area = (radius x radius) x 3.14
4" pipe the radius is 2" = (2 x 2) x 3.14 = 12.5 sq inches
|
Duct Size |
Area Sq Inches |
|
4" |
12.5 |
|
5" |
19.6 |
|
6" |
28.3 |
|
7" |
38.5 |
|
8" |
50.2 |
|
9" |
63.6 |
|
10" |
78.5 |
|
12" |
113.0 |
|
14" |
153.9 |
|
16" |
201.0 |
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