Instinct Venting Manual

Vent Termination
12" [30.5 cm]
(18” [45.7 cm] Canada)
Above the Highest
Anticipated Snow Level
12" Min.
[30.5 cm]
22
CHAPTER 3
CHAPTER 3 - CATEGORY IV (INDOOR AIR) INSTALLATION OF VENT/AIR PIPING
3.1.4 Category IV - Multiple Boiler Installation -
Through the Roof
1. On installations of multiple INSTINCT boilers, termi-
nate each vent pipe as described in this manual.
2. Each vent termination must be a minimum 12” [30.5
cm] from the adjacent termination for installations
in the U.S. as shown in Fig. 17 below. For installa-
tions in Canada, provide clearances as required by
CAN/CSA B149.1.
3.2. Category IV - Horizontal - Sidewall
• The installation must conform to the re-
quirements of the authority having juris-
diction or, in the absence of such require-
ments, to the National Fuel Gas Code,
ANSI Z223.1/ NFPA 54, and/or Natural Gas
and Propane Installation Code, CAN/CSA
B149.1.
• For sidewall vented installations in the
Commonwealth of Massachusetts, the in-
staller must comply with the additional re-
quirements outlined in page 29.
A gas vent extending through a sidewall must
not terminate near an adjacent wall or below
any building extensions such as roof eaves,
balconies or decks. Failure to comply with the
required clearances in this manual can result in
substantial property damage, serious injury, or
death.
The information and diagrams outlining the
fittings and method of terminating the vent/
combustion air are directly related to PVC/
CPVC vent systems. When utilizing an AL29-
4C® vent system, there may be some variations.
Consult the appropriate vent manufacturer for
recommendations and clarifications.
3.2.1 Determine Termination Location
Locate the vent and combustion air termination using
the following guidelines:
1. The total length of the vent piping must not exceed
the limits given in Table 2 on page 4.
Do not include the 90º elbows used to termi-
nate the vent exterior of the building when de-
termining the total length of pipe.
NOTICE
WARNING
NOTICE
NOTICE
Fig. 17 - Category IV- Vertical Termination of Multiple INSTINCT
Boilers