32
18-CE03D1-1F-EN
Horizontal Venting
3” Venting requirements
Important:
To determine if your application requires 3” venting, see
the Maximum Vent Length Table.
Important:
Horizontal venting application must use the 2” x 3” offset
reducing coupling. Vertical venting applications do not
require the reducing coupling to be offset.
When the vent pipe is exposed to temperatures below
freezing, e.g., when it passes through unheated spaces, etc.,
the pipe must be insulated with 1/2 inch (12.7 mm) thick
Armaflex-type insulation or equal.
If the space is heated sufficiently to prevent freezing, then the
insulation will not be required. If domestic water pipes are not
protected from freezing then the space meets the condition of
a heated space.
Note:
If your furnace comes with a factory supplied 2" X 3" offset
reducing coupling it is used for 3" vent pipe installation. Make
sure the marking "TOP" is located on the top side of the pipe in
horizontal venting applications. The straight side of the
coupling must be on bottom for proper drainage of condensate.
Note:
For Canadian applications, BAYREDUCE 2” x 3” offset reducing
coupling meets ULC-S636 requirements. Make sure the
marking "TOP" is located on the top side of the pipe. The
straight side of the coupling must be on bottom for proper
drainage of condensate in horizontal venting.
FIELD SUPPLIED
2” COUPLING
LABEL
SAYS
“TOP”
2" TO 3" COUPLING
CPL00938
BAYREDUCE may be
used in Canadian
applications to meet
ULC-S636
CPL00938 IS FACTORY
SUPPLIED ONLY WITH THE
120,000 BTUH UPFLOW
FURNACE MODELS
FIELD SUPPLIED
2” COUPLING
2" TO 3" COUPLING
CPL00938 IS FACTORY
SUPPLIED ONLY WITH THE
120,000 BTUH UPFLOW
FURNACE MODELS
CPL00938
BAYREDUCE may be
used in Canadian
applications to meet
ULC-S636
