DIRECT VENT (cont.)
GENERAL VENTING REQUIREMENTS AND
GUIDELINES
Venting
61
FIGURE 26
TYPICAL HORIZONTAL VENTED 2 PIPE TERMINALS
ST-A1194-18-XO
FIGURES M, L, &
DETAILS B & C.
OPTION 4: ALTERNATE HORIZONTAL DIRECT-VENT TERMINATION
OPTION 5
: VARIANT OF ALTERNATE HORIZONTAL DIRECT-VENT TERMINATION
REDUCER / ADAPTER
2
EQUIV. VENT LENGTH
1
DETAIL A
COMBUSTION AIR TERMINATION
2” PVC
COUPLING
VANE
D
FIGURE 27
VARIANT OF ALTERNATE HORIZONTAL DIRECT-VENT TERMINATION
U.S. MIN. 12” (31cm)
ABOVE GRADE OR
ANTICIPATED AVG.
SNOW ACCUMULATION
CANADA: TERMINATION
MUST CONFORM TO CSA
B149.1-10, SECT. 8.14
60” Max. (152cm)
6” (15.5cm) Min. From Wall
18” Max. (46cm)
3” Min. (8cm)
NOTE:
1) FOR EXHAUST / INTAKE PENETRATION
DIMENSIONAL RELATIONSHIP SEE
DETAIL C
NOTE:
A TRAP MUST BE IN-
STALLED IN THIS OPTION
TO PREVENT WATER FROM
ENTERING THE FURNACE
THROUGH THE COMBUS-
TION AIR PIPE. ORDER KITS
RXGY-005 FOR 2” PIPE OR
RXGY-D6 FOR 3” PIPE AND
INSTALL PER INSTRUC-
TIONS IN KIT.
U.S. MIN. 12” (31cm)
ABOVE GRADE OR
ANTICIPATED AVG.
SNOW ACCUMULATION
CANADA: TERMINATION
MUST CONFORM TO CSA
B149.1-10, SECT. 8.14
WIND VANE FROM
FURNACE PARTS BAG
EXHAUST
INTAKE
12” (31cm) From Wall
5” Max. (46cm)
3” Min. (8cm)
U.S. MIN. 12” (31cm)
ABOVE GRADE OR
ANTICIPATED AVG.
SNOW ACCUMULATION
CANADA: TERMINATION
MUST CONFORM TO CSA
B149.1-10, SECT. 8.14
U.S. MIN. 12” (31cm)
ABOVE GRADE OR
ANTICIPATED AVG.
SNOW ACCUMULATION
CANADA: TERMINATION
MUST CONFORM TO CSA
B149.1-10, SECT. 8.14
60” Max. (152cm)
12” (31cm)
EXHAUST
INTAKE
A
B
5” Max. (46cm)
3” Min. (8cm)
EXHAUST
INTAKE
12” (31cm)
60” Max. (152cm)
OR
CHOOSE
EITHER
DETAIL APPLIES TO BOTH TERMINATIONS
SHOWN
ST-A1194-18-XO
FIGURES N & P &
DETAIL C
SEE DETAIL A
COUPLINGS: REQUIRED ON EXTERIOR,
OPTIONAL ON INTERIOR.
SEE DETAIL B FOR
DIMENSIONS BETWEEN
INTAKE & EXHAUST
EQUIV. VENT LENGTH
1
DETAIL B
EXHAUST / INTAKE RELATIONSHIP
4” (10cm) MIN.
12”(31cm) MAX.
OPTIONAL
INTAKE
INTAKE
EXHAUST
D
3 IN (8cm) MIN.
5 IN (13cm) MAX.
NOTES:
1) SUPPORT HORIZONTAL PIPE EVERY FOUR FEET.
2) WHEN 3” PIPE IS USED REDUCE TO 2” BEFORE PENETRATING OUTSIDE WALL.
3) 18” (46cm) MAX. 2” DIA. PIPE MAY BE USED INSIDE WALL.
4) INCREASE THE 12” (31cm) MIN. ABOVE GRADE (U.S.) TO KEEP TERMINAL OPENINGS
ABOVE ANTICIPATED LEVEL OF SNOW ACCUMULATION WHERE APPLICABLE.
CANADA: REFER TO B149.1, SECT. 8.14.
5) DETAIL“A” 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) PIPING EXTERNAL TO THE STRUCTURE MUST BE INSULATED AS REQUIRED FOR
LOCAL CLIMATE.
OPTION B 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 FOR LOCAL CLIMATES.
OPTION A ONLY
NOTE: 1. A TRAP MUST BE INSTALLED IN THIS OPTION
TO PREVENT WATER FROM ENTERING THE
FURNACE THROUGH THE COMBUSTION AIR
PIPE. ORDER KITS RXGY-D05 FOR 2” PIPE OR
RXGY-D06 FOR 3” PIPE AND INSTALL PER IN-
STRUCTIONS IN KIT.
2. PIPING EXTERNAL TO THE STRUCTURE
MUST BE INSULATED FOR LOCAL CLIMATES
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