HVAC Duct

Penetration Item (Size and Type)

Sleeve
O = Optional
R = Required

Point Contact

Assembly Thickness

F Rating

Nelson Product

UL System

Nelson FS Drawing

12” X 12” 24 GA  3¾,5 1,2 LBS3 W-L-7104 FS-0609
18” X 67” 24 GA  X 3¾,5 1,2 ES1399 W-L-7084 FS-0401
20” X 20” 24 GA  X 3¾,5 1,2 FSC3 W-L-7083 FS-0400
24” X 30" 24 GA, 1½ FIBERGLASS  3¾,5 1,2 ES1399 W-L-7085 FS-0402
40” X 20", 24 GA  3¾,5 1,2 LBS3 W-L-7105 FS-0610