Specification

TECHNICAL DATA SHEET
February 2011
Product
Concentric Vent
General
The Concentric Vent allows both the intake for combustion air and
the exhaust vent to pass through a standard roof or sidewall. This is
an alternative to the standard two pipe intake/vent shown in the
basic furnace installation instructions.
Two Concentric Vent products are available: CVENT-2 is for use
with 2” intake/vent systems and CVENT-3 is for use with 3” intake/
vent systems.
Refer to the furnace installation instructions for intake/vent pipe
sizing information.
NOTE: The Concentric Vent reduces the allowable intake/vent
piping length by 5 feet from that listed in the basic furnace
installation instructions.
WARNING
Do not use the Concentric Vent kit for anything other than a
Category IV furnace. Failure to follow this warning could result in
fire, personal injury or death.
WARNING
Do not operate the furnace until the installation and assembly
of the Concentric Vent and all piping are completed. Failure to
follow this warning could result in product damage or improper
operation, personal injury or death.
Each concentric vent kit contains the following items:
(1) Combustion Air Inlet Cap
(1) Air Inlet Pipe
(1) Vent Pipe
(1) Intake/Vent Concentric “Y”
(1) Installation Instructions on box
Pipe and
fittings are
required to
complete
installation
(user
supplied). The combustion air and vent pipe fittings must conform ANSI and ASTM standards D1785, F891,
D2665, D2241, D2661, or F628. Pipe cement and primer must conform to ASTM standards D2564 or
D2235.
In Canada, construct all combustion air and vent pipes for this
unit of CSA or ULC certified Schedule 40 PVC, PVC-DWV, or
ABS-DWV pipe and pipe cement.
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Concentric Vent
MODEL INTAKE/VENT NOM.
PIPE SIZE
OVERALL ASSEM’D
LENGTH1
INTAKE PIPE OUTSIDE
DIAMETER
AIR INLET PIPE
LENGTH2
CVENT-2 2” 34-3/4” 3-1/2” 27-1/4”
CVENT-3 3” 39-3/4” 4-1/2” 31-7/8”
Assembled Terminal
“Y” Concentric Fitting
3” or 4” diameter
air inlet pipe
2” or 2-1/2”
diameter vent pipe
Combustion
air inlet cap