24
18-CD37D1-2-EN
Installer’s Guide
VENTING THROUGH THE ROOF
When penetrating roof with a 2" PVC vent pipe, a 2" electrical
conduit flashing may be used for a weather tight seal.
Lubricate flexible seal on flashing before PVC pipe is pushed
through the seal. (Field Supplied)
NOTE: No vent cap as shown in Figure 37 is the preferred
method for vertical vent termination in extremely cold
climates.
In extreme climate conditions, insulate the exposed pipe
above the roof line with Armaflex type insulation.
VENT FITTING MATERIAL – STAINLESS STEEL
Gas and liquid tight single wall metal vent fitting, designed for
resistance to corrosive flue condensate such as Type 29-4C
MUST be used throughout.
These fittings and fitting accessories are to be field supplied.
DIRECTION OF STAINLESS STEEL FITTING
All stainless steel fitting must be installed with male end
towards the Furnace.
All horizontal stainless steel sections must be positioned with
the seam on top.
All long horizontal sections must be supported to prevent
sagging.
All pipe joints must be fastened and sealed to prevent escape
of combustion products into the building.
Figure 40
TYPE 29-4C STAINLESS STEEL VENTING
THROUGH UNUSED CHIMNEY
Figure 41. VENTING ROUTED THROUGH A MASONRY CHIMNEY
PVC PLASTIC VENTING
THROUGH UNUSED CHIMNEY
SUPPORT THE SINGLE
WALL FLUE PIPE AND
CENTER IT IN THE
CHIMNEY OPENING WITH
ANGLES AS SHOWN OR
ANOTHER EQUIVALENT
MANNER.
NOTE:
HORIZONTAL VENTING
TO VERTICAL VENTING
6 IN. MIN.
STAINLESS
STEEL
VENT CAP
(OPTIONAL)
SEE CAUTION
FLUE PIPE
COUPLING
AS REQUIRED
FLUE PIPE
COUPLING TO SUPPORT
PIPE FROM ANGLES
OR OTHER SUITABLE
SUPPORT METHOD
SUPPORT THE SINGLE WALL
STAINLESS STEEL GAS
VENTING AND CENTER IT IN
THE CHIMNEY OPENING WITH
ANGLES AS SHOWN OR
ANOTHER EQUIVALENT
MANNER.
NOTE:
HORIZONTAL VENTING
TO VERTICAL VENTING
6 IN. MIN.
SEE CAUTION
STAINLESS
STEEL
VENT CAP
(OPTIONAL)
IMPORTANT –
The single wall flue pipe joints must be sealed.
The 90° elbow connection to vertical pipe must be sealed
to prevent condensate leakage to base of masonry
chimney.
IMPORTANT –
Refer to Section 12.6.8 of NFPA 54 / ANSI 223.1 2012
when routing vent piping through a chimney.
IMPORTANT –
Refer to Section 12.6.8 of NFPA 54 / ANSI 223.1 2012
when routing vent piping through a chimney.
IMPORTANT
–
The single wall flue pipe joints must be sealed.
The 90° elbow connection to vertical pipe must be sealed to
prevent condensate leakage to base of masonry chimney.
