UTICA BOILERS CCB-150 Instruction Manual page 18

Combustion Air and Venting Pipe
Table 2 – Combustion Air and Vent Pipe Fittings Category I (Chimney Vent)
Item
Vent Pipe & Fittings
Combustion Air
Table 3 – Combustion Air and Vent Pipe Fittings
Type Item
Direct Vent Vent
Air intake
Category III Vent
Equivalent Length of Venting Components:
5 ft. equivalent for a 3" 90° elbow.
2 ½ ft. equivalent for a 3" 45° elbow.
Material
Type B Vent
Masonry Chimney – must
conform to proper sizing and
materials
Stainless Steel, PVC, CPVC, PP,
Aluminum
Diameter Min Length
3" 5 ft
3" 5 ft
3" 5 ft
Standards
UL 441, ULC S605
National Fuel Gas Code, ANSI
Z223.1 / NFPA 54
ANSI / ASTM D2564, ANSI /
ASTM F493, UL 1738 /
ULC636-08
Max Length Material
65 ft AL294C Stainless
Steel, Aluminum
65 ft Stainless Steel,
PVC, CPVC, PP,
Aluminum
65 ft AL294C Stainless
Steel, Aluminum
Standards
UL1738, ULC S636
UL1738, ULC
S636