Filter
Top Products
2
3
TABLE 1.1: SUMMARY OF HORIZONTAL VENTING OPTIONS
VENT OPTION # 1 2 3 4
CLASSIFICATION USED IN THIS
MANUAL
HORIZONTAL
TWIN PIPE
HORIZONTAL
TWIN PIPE
HORIZONTAL
TWIN PIPE
HORIZONTAL
TWIN PIPE
ILLUSTRATED IN FIGURE 1.2 1.3 1.4 1.4
VENT PIPE PENETRATION
THROUGH STRUCTURE
WALL WALL WALL WALL
AIR INTAKE PIPE PENETRATION
THROUGH STRUCTURE
WALL WALL WALL WALL
VENT PIPE SIZE
3” 3”
3” 4”
AIR INTAKE PIPE SIZE
3” 3”
4” 4”
MAXIMUM LENGTH
VENT
BWC070 100ft 100ft
BWC090 100ft 100ft
BWC120 100ft 100ft
BWC151 100ft 100ft
BWC150
55ft
BWC225
55ft
INLET
BWC070 100ft 100ft
BWC090 100ft 100ft
BWC120 100ft 100ft
BWC151 100ft 100ft
BWC150
60ft
BWC225
60ft
MINIMUM LENGTH
VENT
BWC070 2ft 2ft
BWC090 2ft 2ft
BWC120 2ft 2ft
BWC151 2ft 2ft
BWC150
2ft
BWC225
2ft
INLET
BWC070 2ft 2ft
BWC090 2ft 2ft
BWC120 2ft 2ft
BWC151 2ft 2ft
BWC150 2ft
BWC225 2ft
VENT TERMINAL TEE (Note #1)
CROWN
PN 230873
CONCENTRIC
TERMINAL
TEE (Note #1) TEE (Note #1)
AIR INTAKE TERMINAL TEE (Note #1) TEE (Note #1) TEE (Note #1)
VENT MATERIAL
CPVC + PVC
(Note #2)
CPVC + PVC
(Note #2)
CPVC + PVC
(Note #2)
CPVC + PVC
(Note #2)
AIR INTAKE MATERIAL PVC PVC PVC PVC
Note #1: TEEs may be offset on snorkels as shown in Figure 1.10
Note #2: First 30” and Elbow connected to boiler must be CPVC. Downstream vent pipe can be PVC, except as noted in text.