32
Category I - Installation of Vent/Air Piping
-
The vent connector should be installed in a
manner without any dips or sags and should
slope upward toward the vent or chimney at
least 1/4 inch per 1 foot.
-
The location of the appliance should be located
as close to the vent or chimney to maintain the
vent connector length as short as possible.
The maximum horizontal length allowable
should not exceed 75% of the height of the vent
or chimney assuming no offsets in the vertical
vent.
-
The entire length of a vent connector shall be
readily accessible for inspection, cleaning and
replacement.
-
The diameter of the vent connector should not
be upsized more than two sizes greater than the
flue outlet diameter.
The minimum recommended vent connector
given in Table 4 is only a general guideline. The
vent system must be designed and installed in
compliance with all applicable codes. Failure to
properly size and install the vent system could
result in severe personal injury, death or substan-
tial property damage.
WARNING
BEST PRACTICE
There are certain applications for the MODULAT-
ING DELTA in which upsizing the vent connector
to 5 inches will not result in sufficient maximum
capacity requirements. In these applications the
installer, after consultation with Triangle Tube
Engineering, may upsize the vent connector to 6
inches provided the vent connector and vent
system are Type B.
Common Venting - Category I
A Category I vented MODULATING DELTA (PG-150 &
PG-199) may be vented into a common vent system
using the guidelines and sizing Tables of the National
Fuel Gas Code NFPA 54 ANSI Z223.1 latest edition.
A Category I vented MODULATING DELTA (PG-150 &
PG-199) may also be vented into a common multi story
vent using the guidelines and sizing Tables of the
National Fuel Gas Code NFPA 54 ANSI Z223.1 latest
edition.
NOTICE
MODULATING
Min. Recommended
DELTA
Vent Connector
Model
Diameter
PG-150
4 inches
PG-199
5 inches
TABLE 4: Vent Connector Diameter
