VENT INSTALLATION
VERTICAL (THROUGH-THE-ROOF)
APPLICATIONS
This gas fireplace has been approved for,
•Vertical installations up to 40' (12m) in height. Up to a 10' (3m) horizontal vent run can be installed within the vent system using a maximum of two 90° elbows. See Figure 18.
NOTE: Horizontal sections of this vent system require a minimum of 3" clearances to combustibles at the top of the flue and 1" clearance at the sides and bottom until the flue penetrates the outside wall. A minimum 1" clearance all around the flue is acceptable at this point of penetration.
Vertical sections of this vent system require a minimum of 1" clearance to combustibles on all sides of the pipe.
•Up to two 45° elbows may be used within the horizontal run. For each 45° elbow used on the horizontal plane, the maximum horizontal length must be reduced by 18" (450mm).
Example: Maximum horizontal length No elbows = 10’ (3m)
1x45° elbows = 8.5’ (2.6m) 2x45° elbows = 7’ (2.1m)
•A minimum of an 8' (2.5m) vertical rise is required.
•Two sets of 45°elbows offsets may be used within the vertical sections. From 0 to a maximum of 8' (2.5 m) of vent pipe can be used between elbows. See Figure 19.
•The maximum angular variation allowed in the system is 270°. See Figure 19.
•The minimum height of the vent above the highest point of penetration through the roof is 2' (610mm).
Example: | Elbow 1 | = | 90° |
| Elbow 2 | = | 45° |
| Elbow 3 | = | 45° |
| Elbow 4 | = | 90° |
Total Angular Variation | = | 270° | |
40' Maximum Height
12' Minimum Height
10'
Maximum
24" Min.
Support Straps
Every 3'
Figure 18 - Support Straps for
Horizontal Runs
| 1 |
| 2 |
| 3 |
24" Min. | 4 |
|
Figure 19 - Maximum Elbow Usage
20 | 73D0024 |
