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TABLE 1.4: VENT/ AIR INTAKE FITTING EQUIVALENT LENGTH
VENT FITTING
80/125mm 90° CONCENTRIC ELBOW
80/125mm 90° SWEEP CONCENTRIC ELBOW
80/125mm 45° CONCENTRIC ELBOW
80/125mm 90° CONCENTRIC SUPPORT ELBOW
100/150mm 90° SWEEP CONCENTRIC ELBOW
100/150mm 45° CONCENTRIC ELBOW
100/150mm 90° CONCENTRIC SUPPORT ELBOW
TABLE 1.5: SUMMARY OF VERTICAL VENTING OPTIONS
VENT OPTION #
CLASSIFICATION USED IN THIS
MANUAL
ILLUSTRATED IN FIGURE
VENT PIPE PENETRATION
THROUGH STRUCTURE
AIR INTAKE PIPE STRUCTURE
THROUGH STRUCTURE
VENT PIPE SIZE
AIR INTAKE PIPE SIZE
BWC150
BWC225
BWC150
BWC225
BWC150
BWC225
BWC150
BWC225
VENT TERMINAL
AIR INTAKE TERMINAL
VENT MATERIAL
AIR INTAKE MATERIAL
8
VERTICAL
CONCENTRIC
1.7
ROOF
ROOF
80/125 mm CONCENTRIC
47
47
2
2
CROWN #230532
CONCENTRIC TERMINAL
(TABLE 1.6a)
CROWN 80/125 mm VENT
COMPONENTS SHOWN IN
TABLE 1.6a
7
EQUIVALENT LENGTH (ft)
8.5
5.5
3.0
8.5
8.0
3.0
10.0
9
VERTICAL
CONCENTRIC
1.7
ROOF
ROOF
100/150 mm CONCENTRIC
45
45
2
2
CROWN #230570
CONCENTRIC TERMINAL
(TABLE 1.6b)
CROWN 100/150 mm VENT
COMPONENTS SHOWN IN
TABLE 1.6b
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