E. Vent Diagrams
To replace the first starter elbow with two 45° elbows, refer to Figure 7.3. All other 90° elbows can be replaced with two 45° elbows.
General Rules:
•A maximum of three 90° elbows (or six 45° elbows) may be used in any vent configuration. Some elbows may be installed horizontally. See Figure 7.6.
•Elbows may be placed back to back anywhere in the system as long as the first 90° elbow is a starter elbow except as shown in Figure 7.3.
•When penetrating a combustible wall, a wall shield firestop must be installed.
•When penetrating a combustible ceiling, a ceiling firestop must be installed.
•Horizontal runs of vent do not require vertical rise; horizontal runs may be level.
Note: The Multi-Sided series fireplaces can adapt
to SLP series vent pipe, if desired.
When venting off the top of the unit, attach a
After the 48 inch vertical section, the venting table rules must be followed. The first 48 inch vertical section is NOT counted as part of the vertical components in the table. It is still counted as part of the overall maximum run. All venting table rules for the vent run must still be followed.
Example: DVP pipe 3 ft. min. vertical = 11 ft. max. horizontal SLP pipe 7 ft. min. vertical = 11 ft. max. horizontal
1. Top Vent - Horizontal Termination - (continued)
Top
Installation requirements to replace the first 90° elbow with two 45° elbows:
4 ft min.
(1.22 m)
Note: Reference Figure 7.14 for special instructions for use of 45º elbow on rear vent appliances.
16 ft max.
(4.87 m)
Figure 7.3 Minimum Installation Requirements for Two 45°
Heat & Glo • | 27 |
