ventING installation | Designer Series Gas Fireplaces |
Below Grade Installations
When it is not possible to meet the required vent terminal clearances of 12" above grade level, a snorkel kit is recommended. It allows installation depth down to 7" (178 mm) below grade level. The 7" (178 mm) is measured from the center of the horizontal vent pipe as it penetrates through the wall.
Ensure that sidewall venting clearances are observed. If venting system is installed below ground, we recommend a window well with adequate and proper drainage to be installed around the termination area.
If installing a snorkel, a minimum 24" vertical rise is necessary. The maximum horizontal run with the 24” vertical pipe is 36". This measurement is taken from the collar of the fireplace (or transition elbow) to the face of the exterior wall. Refer to the Sidewall Venting Graph for extended horizontal run if the vertical exceeds 24".
1.Establish vent hole through the wall. Refer to Page 18, Figure 17
2.Remove soil to a depth of approximately 16" below base of snorkel. Install drain pipe. Install window well (not supplied). Refill hole with 12" of coarse gravel leaving a clearance of approxi- mately 4" below snorkel. Figure 28
3.Install vent system.
4.Ensure a watertight seal is made around the vent pipe coming through the wall.
5.Slide the snorkel into the vent pipes and secure to the wall.
6.Level the soil so as to maintain a 4" clearance below snor- kel. Figure 28
WARNING
•Do not back fill around snorkel.
•A clearance of at least 4” must be maintained between the snorkel and the soil.
If the foundation is recessed, use recess brackets (not supplied) for securing lower portion of the snorkel. Fasten brackets to wall first, then secure to snorkel with self drilling #8 x 1/2" sheet metal screws. It will be necessary to extend vent pipes out as far as the protruding wall face. Figure 28
| Screws |
Firestop |
|
| Minimum |
| 4" Clearance |
| Ground |
24" | Window Well |
| |
Minimum | Gravel |
| |
| Drain |
| Foundation Wall |
Foundation
Recess
Watertight Seal Around Pipe
Snorkel
Wall Screws
Sheet Metal |
Screws |
FP1965 |
Figure 28 -
Below Grade Installation
FP1966
Figure 29 -
Snorkel Installation, Recessed Foundation
42D0200 | 21 |
