35
Ve
ntin
g
DIRECT VENT (cont.)
GENERAL VENTING REQUIREMENTS AND
GUIDELINES
OPTION 2: STANDARD HORIZONTAL DIRECT-VENT TERMINATION
OPTION 3: VARIANT OF STANDARD HORIZONTAL DIRECT-VENT TERMINATION
ST-A1194-18-XO
FIGURES O, Q &
DETAIL C
OPTION B ONLY
NOTE:
1. A TRAP MUST BE INSTALLED IN
THIS OPTION TO PREVENT
WATER FROM ENTERING THE
FURNACE THROUGH THE COM-
BUSTION AIR PIPE. ORDER KITS
RXGY-D05 FOR 2” PIPE OR RXGY-
D06 FOR 3” PIPE AND INSTALL
PER INSTRUCTIONS IN KIT.
2. PIPING EXTERNAL TO THE
STRUCTURE MUST BE INSU-
LATED FOR LOCAL CLI-
MATES.
3. WALL PENETRATIONS
AND VENT TERMINA-
TIONS MUST BE WITH
2”
PIPE. A MAXIMUM
OF 18” OF 2”
PIPE
IS PERMITTED INSIDE
(BEFORE THE PENE-
TRATION) WHEN
USING 3”
VENT.
EXHAUST COUPLING
REQUIRED
WIND VANE FROM
FURNACE PARTS
BAG
DETAIL APPLIES TO BOTH TERMINATIONS
SHOWN
INTAKE
12”
(31
cm
) F
rom
W
all
6” (
15.5
cm
) M
in. F
rom
W
all
18”
M
ax.
(46
cm
)
3” M
in. (
8cm
)
A
B
CHOOSE
EITHER
OR
1) SUPPORT HORIZONTAL PIPE EVERY FOUR FEET.
2) WHEN 3” PIPE IS USED REDUCE TO 2” BEFORE
PENETRATING OUTSIDE WALL.
3) WHEN USING 3” Ø VENT AND NECKING DOWN TO
2” Ø AS REQUIRED, 18” (46cm) MAX. 2” DIA. PIPE MAY BE USED INSIDE THE WALL.
4) INCREASE THE 12” (31cm) MIN. (U.S.) ABOVE GRADE TO KEEP
TERMINAL OPENINGS ABOVE ANTICIPATED LEVEL OF SNOW ACCUMULATION
WHERE APPLICABLE. CANADA: TERMINATIONS MUST CONFORM TO CSA B149.10, SECT. 8.14.
5) DETAIL “B” INSTALL WIND DEFLECTOR VANE IN 2” PVC COUPLING IN VERTICLE
POSITION USING PVC SOLVENT.
6) THE COMBUSTION AIR TERMINATION MUST BE IN THE SAME PRESSURE ZONE AS
THE EXHAUST TERMINATION.
7) NO SCREENS MAY BE USED TO COVER COMBUSTION AIR OR EXHAUST.
8) NO T’S CAN BE INSTALLED AT THE TERMINATION.
9) WALL PENETRATION AND VENT TERMINATIONS MUST BE WITH 2”
Ø
PIPE.
SEE DETAIL A
COUPLINGS: REQUIRED
ON EXTERIOR, OPTIONAL
ON INTERIOR
SEE DETAIL B
FOR DIMENSION
BETWEEN INTAKE
AND EXHAUST
9
ST-A1194-18-XO
FIGURE K &
DETAILS B & C
U.S. MIN. 12” (31cm) ABOVE
GRADE OR ANTICIPATED AVG.
SNOW ACCUMULATION.
CANADA: TERMINATION MUST CONFORM
TO CSA B149.1-10, SECT. 8.14
DETAIL APPLIES TO BOTH TERMINATIONS
SHOWN
B
NOTE:
This detail
applies to the ter-
mination and NOT
the penetration
through the wall.
NOTE:
This detail
applies to the ter-
mination and
NOT the penetra-
tion through the
wall.
EXHAUST: COUPLING
REQUIRED
INTAKE
12” (3
1cm
) Fro
m W
alll
NOTE:
1) A TRAP IN THE COMBUSTION AIR PIPE
IS NOT REQUIRED FOR THIS OPTION.
2) PIPING EXTERNAL TO THE STRUCTURE
MUST BE INSULATED AS REQUIRED FOR
LOCAL CLIMATE.
5” M
ax. (1
5cm
)
3” M
in. (8
cm)
EXHAUST COUPLING
REQUIRED
INTAKE
U.S. MIN. 12” (31cm) ABOVE
GRADE OR ANTICIPATED AVG.
SNOW ACCUMULATION
CANADA: TERMINATION MUST
CONFORM TO CSA
B149.1-10, SECT. 8.14
12”
(31
cm
) F
rom
W
all
5” M
ax.
(13
cm
)
3” M
in. (
8cm
)
OPTION A ONLY
NOTE:
1) A TRAP IN THE COMBUSTION AIR PIPE IS NOT REQUIRED FOR THIS OPTION.
2) PIPING EXTERNAL TO THE STRUCTURE MUST BE INSULATED AS REQUIRED
FOR LOCAL CLIMATE
3) WALL PENETRATIONS AND VENT TERMINATIONS MUST BE WITH 2”
PIPE.
WHEN USING 3”
VENT AND NECKING DOWN TO 2”
AS REQUIRED, A MAX-
IMUM OF 18” OF 2”
PIPE IS PERMITTED INSIDE (BEFORE THE PENETRA-
TION) WHEN USING 3”
VENT.
5” Max. (13cm)
3” Min. (8cm)
FIGURE 19
VARIANT OF STANDARD HORIZONTAL DIRECT-VENT TERMINATION
FIGURE 18
STANDARD HORIZONTAL DIRECT VENTING
