B U I L D I N G A N E N C L O S U R E
Converting a round port to a slot port.
Calculate the area of the round port(s) being used, then use the square root function of your calculator to get the interior dimensions of an equivalent suare port. The length (or depth) of the slot port will be the same as that of the round port.
To calculate area: ( Area is a two dimensional measurement ) Circle =3.14 x Radius x Radius
Circle Port 
4"
2" | 2" |
4" Port
2 x 2 x 3.14=12.6
1" 12.6 x 1=12.6
Slot Port
12.6"
Patent No: US D478,556 S
Patent No: US 6,601,645 B1
Patent No: US 6,656,000 B2
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