Slant/Fin VHG-100-CH Installation And Service Manual page 70

Multiple vent/air terminations
1. When terminating multiple boilers, terminate each vent/air connection as described in this manual.
All vent pipes and air inlets must terminate at the same height to avoid possibility of severe
personal injury, death, or substantial property damage.
WARNING
2. Place wall penetrations to obtain minimum clearance of 12 inches (305 mm) between the inside edge of the
exhaust vent and the inside edge of the air intake elbow, as shown in figure 9.18 for U.S. installations.
For Canadian installations, provide clearances required by CSA B149.1 Installation Code.
3. The air inlet of the boiler is part of a direct vent connection. It is not classified as a forced air intake with regard
to spacing from adjacent boiler vents.
Two pipe multiple boilers vent terminations.
Figure 9.3
Concentric Sidewall termination installation:
70
E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
Note: Keep air intake at min. 12" above grade or snow
line. Provide vent and air intake with bird screen.
Figure 9.18
Wall termination – concentric vent
Description and usage: concentric combustion air and
exhaust vent pipe termination. Both combustion air and
exhaust vent pipes must attach to the termination kit. The
termination kit must terminate outside the structure and
must be installed as shown. The required combustion vent
pipe materials are listed in Table 9.5 of this manual.
Concentric sidewall termination clearances:
Sidewall termination installation
- Determine the best location for the termination kit
- Reference paragraph 9.13.2 of this manual for general
termination considerations.
Figure 9.19