Horizontal Terminal Clearance Requirements (continued):
•Vent terminal must be at least 6 feet from an inside corner.
•Under certain conditions, water in the flue gas may condense, and possibly freeze, on objects around the vent terminal including on the structure itself. If these objects are subject to damage by flue gas condensate, they should be moved or protected.
•If possible, install the vent and air intake terminals on a wall away from the prevailing wind. Reliable operation of this boiler cannot be guaranteed if these terminals are subjected to winds in excess of 40 mph.
•Air intake terminal must not terminate in areas that might contain combustion air contaminates, such as near swimming pools. See Section IV for more information on possible contaminates.
TABLE 7.1: SUMMARY OF HORIZONTAL VENTING OPTIONS
VENT OPTION #
CLASSIFICATION USED IN THIS MANUAL
ILLUSTRATED IN FIGURE
VENT PIPE PENETRATION
THROUGH STRUCTURE
AIR INTAKE PIPE PENETRATION THROUGH STRUCTURE
VENT PIPE SIZE
AIR INTAKE PIPE SIZE
LENGTH | VENT |
| BWC070 |
| BWC090 | ||
|
|
| |
MAXIMUM | INLET |
| BWC120 |
| BWC120 | ||
|
|
| BWC070 |
|
|
| BWC090 |
LENGTH | VENT |
| BWC070 |
| BWC090 | ||
|
|
| |
MINIMUM | INLET |
| BWC120 |
| BWC070 | ||
|
|
| |
|
|
| BWC090 |
|
|
| BWC120 |
VENT TERMINAL |
| ||
| |||
AIR INTAKE TERMINAL | |||
VENT MATERIAL
AIR INTAKE MATERIAL
1 | 2 | 3 | |
HORIZONTAL | HORIZONTAL | HORIZONTAL | |
CONCENTRIC | TWIN PIPE | CONCENTRIC | |
7.2 | 7.3 | 7.2 | |
WALL | WALL | WALL | |
WALL | WALL | WALL | |
60/100 mm | 3” | 80/125 mm | |
CONCENTRIC | 3” | CONCENTRIC | |
32ft | 55ft | 55ft | |
32ft | 55ft | 55ft | |
18ft | 55ft | 55ft | |
32ft | 55ft | 55ft | |
32ft | 55ft | 55ft | |
18ft | 55ft | 55ft | |
10in | 2ft | 2ft | |
10in | 2ft | 2ft | |
10in | 2ft | 2ft | |
10in | 2ft | 2ft | |
10in | 2ft | 2ft | |
10in | 2ft | 2ft | |
| CROWN | Crown 230531 | |
| #230511 | ||
60/100 mm | CONCENTRIC | ||
| |||
CONCENTRIC | 3” 90 ELBOW | or 230540 | |
| SNORKEL | ||
CROWN | APPROVED |
| |
STAINLESS | CROWN | ||
60/100mm | |||
STEEL VENT | 80/125mm VENT | ||
VENT | |||
SYSTEM | COMPONENTS | ||
COMPONENTS | |||
SHOWN IN | SHOWN IN | ||
SHOWN IN | |||
TABLE 7.5 | TABLE 7.4b | ||
TABLE 7.4a | |||
GALVANIZED |
| ||
(Note #1) |
| ||
OR PVC |
| ||
|
| ||
|
|
|
Note #1: In Vent Option #1, the 80/125mm concentric straight section (PN 230515) shown in Table 7.4a may be used between the boiler and the first 80/125 x 60/100 reducing elbow. If this is done, the overall maximum vent length is still restricted to that shown for Vent Option #1 in Table 7.1 above.
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