7
TYPICAL VENT INSTALLATIONS - HORIZONTAL TERMINATION
| MIN | MAX | FIGURE | |
Allowable 3” vent connections (excluding fireplace and air terminal connections) | N/A | 1 |
| |
Rise per foot (recommended) | 1/4” | N/A |
| |
Rise per foot (allowable) | 0” | N/A |
| |
Horizontal run (If vent run does not include vertical rise) | 4” | 24” | 2a | |
Horizontal run (if vent run includes vertical rise) | 4” | 7 FT | 2b | |
Vertical run | 18”* | 7 FT | 2b, 2c | |
(* Immediately off the fireplace, if 7 FT maximum horizontal run is required) | ||||
|
|
|
See graph to determine the required vertical rise VT for the required horizontal rise HT.
10
9
8
7
6
REQUIRED
VERTICAL 5
RISE IN
FEET (VT) 4
3
2
1.5
1
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
HORIZONTAL VENT RUN PLUS OFFSET IN FEET (HT)
| MAXIMUM | 7 FT MAX. |
FIGURE 2a | HORIZONTAL |
|
4” MIN. |
|
|
24” MAX. | 18” |
|
| 4” |
|
| MIN. |
|
8” 
9 FT MAX.
MAXIMUM 
4” 
VERITICAL
MIN.
8” 
