LX Series Direct Vent Gas Fireplace | VENTING INSTALLATION |
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side. This prevents loose insulation from falling into the required clearance space. Figure 30. Otherwise, install firestop below the framed hole. The firestop should be installed with no less than three nails per side. Figure 35.
Nails
FP1969
Firestop
Figure 30 -
If area above is a room, install firestop above framed hole as shown
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4.Connect a section of pipe and extend up through the hole.
NOTE: If an offset is needed to avoid obstructions, you must support the vent pipe every three (3) feet. Use wall straps for this purpose. Refer to Figures 27 & 29. Whenever possible, use 45° elbows instead of 90° elbows. The 45° elbow offers less restriction to the flow of the flue gases and intake air.
5.Place the flashing over the pipe section(s) extending through the roof. Secure the base of the flashing to the roof and framing with roofing nails. Be sure roofing material overlaps the top edge of the flashing. There must be a 1" clearance from the vent pipe to combustible materials.
6.Continue to add pipe sections until the height of the vent cap meets the minimum requirements below.
NOTE: You must increase vent height for steep roof pitches. Nearby trees, adjoining roof lines, steep pitched roofs, and other similar factors may cause poor draft or
NOTE: If the vent pipe passes through any occupied areas above the first floor, including storage spaces and closets, you must enclose pipe. You may frame and sheetrock the enclosure with standard construction material. Make sure to meet the minimum allowable clearances to combustibles. Do not fill any of the required clearance spaces with insulation.
| FP1970 |
Nails | Firestop |
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Figure 31 -
If area above is not a room, install firestop below framed hole as shown
2. | Assemble the desired lengths of pipe and elbows nec- |
| essary to reach from the burner system flue up through |
| the firestop. Be sure pipe and elbow connections are |
| fully |
3. | Cut a hole in the roof using the locating hole as a center |
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| 2 ft. Min. |
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Min. |
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| Discharge |
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Termination |
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| Opening |
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Vent |
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Storm |
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Collar |
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| FP1971 | |
Flashing |
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| 1” Minimum Clearance to | |||||||||
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| Combustibles |
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point. (Cover any exposed open vent pipes before cut- |
ting hole in roof). The 9Z\x" x 9Z\x" (241 x 241 mm) hole |
must be measured on the horizontal. Actual length may |
be larger depending on the pitch of the roof. There must |
be a 1" minimum clearance from the vent pipe to com- |
bustible materials. (Insulation should be considered a |
combustible material) Frame the opening as shown on |
Page 17, Figure 15. |
Concentric
Vent Pipe
Figure 32 -
Minimum Chimney
Clearance
Roof Pitch | H (feet) |
Flat to 6/12 | 1.0 |
Over 6/12 to 7/12 | 1.25 |
Over 7/12 to 8/12 | 1.5 |
Over 8/12 to 9/12 | 2.0 |
Over 9/12 to 10/12 | 2.5 |
Over 10/12 to 11/12 | 3.25 |
Over 11/12 to 12/12 | 4.0 |
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*H - Minimum height from roof to lowest discharge opening of vent
22 | 51D0528 |
