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TABLE 7.9: SUMMARY OF VERTICAL VENTING OPTIONS
VENT OPTION # 5 6
CLASSIFICATION USED IN THIS
MANUAL
VERTICAL
TWIN PIPE
VERTICAL
CONCENTRIC
ILLUSTRATED IN FIGURE
7.10 7.11
VENT PIPE PENETRATION
THROUGH STRUCTURE
ROOF ROOF
AIR INTAKE PIPE STRUCTURE
THROUGH STRUCTURE
ROOF ROOF
VENT PIPE SIZE
3”
80/125 mm CONCENTRIC
AIR INTAKE PIPE SIZE 3”
MAXIMUM LENGTH
VENT
BWC070
49.5ft 49.5ft
BWC090
49.5ft 49.5ft
BWC120
49.5ft 49.5ft
INLET
BWC070
49.5ft 49.5ft
BWC090
49.5ft 49.5ft
BWC120
49.5ft 49.5ft
MINIMUM LENGTH
VENT
BWC070
2ft 2ft
BWC090
2ft 2ft
BWC120
2ft 2ft
INLET
BWC070
2ft 2ft
BWC090
2ft 2ft
BWC120
2ft 2ft
VENT TERMINAL
STRAIGHT TERMINAL
BY VENT SYSTEM MFR.
(TABLE 7.5)
CROWN #230532
CONCENTRIC TERMINAL
(TABLE 7.4b)
AIR INTAKE TERMINAL
3” 180° ELBOW
(FIGURE 7.10)
VENT MATERIAL
APPROVED STAINLESS
STEEL VENT SYSTEM
CROWN 80/125 mm VENT
COMPONENTS SHOWN IN
TABLE 7.4b
AIR INTAKE MATERIAL GALVANIZED OR PVC
TABLE 7.8: VENT/ AIR INTAKE FITTING EQUIVALENT LENGTH
VENT FITTING EQUIVALENT LENGTH (ft)
60/100mm 90° CONCENTRIC ELBOW 4.5
60/100mm 45° CONCENTRIC ELBOW 4.0
80/125mm 90° CONCENTRIC ELBOW 8.5
80/125mm 90° SWEEP CONCENTRIC ELBOW
5.5
80/125mm 45° CONCENTRIC ELBOW 3.0
80/125mm 90° CONCENTRIC SUPPORT ELBOW
8.5
3” SINGLE WALL 90° ELBOW
5.5
3” SINGLE WALL 45° ELBOW
4.0