Rheem 97MDV060 Series Installation Instructions Manual page 41

GENERAL VENTING REQUIREMENTS AND
MULTIVENTING OF DIRECT-VENT FURNACES
Figures 27 & 28: NOTE: WHEN VENTING MULTIPLE FURNACES IN CLOSE PROXIMITY, EACH FURNACE MUST
BE INDIVIDUALLY VENTED – NO COMMON VENTING IS PERMITTED. See Figures 27 & 28 for positioning of the
naces and the third and etc. Figure 27, (Detail A) below shows the necessary detail for the roof penetration on a stan-
terminations. When more than two furnaces are to be vented, there must be at least 4 feet between the first two fur-
TWO-PIPE VENTING
THROUGH ROOF
dard direct-vent vertical termination.
FIGURE 27
TWO FURNACE VENTING
TWO-PIPE VENTING
COMBUSTION
THROUGH ROOF
TWO PIPE VENTING THROUGH ROOF
AIR INTAKE
2" PVC
TERMINATIONS MORE THAN
24" ABOVE ROOF PENETRA-
SEE DETAIL
TION REQUIRE ADDITIONAL
"A"
SUPPORT.
COMBUSTION
AIR INTAKE
2" PVC
SEE DETAIL
"A"
TWO-PIPE VENTING
THROUGH WALL
TWO PIPE VENTING THROUGH WALL
TWO-PIPE VENTING
THROUGH WALL
12"/31cm MIN. ABOVE
A GRADE OR HIGHEST
8"/20cm ANTICIPATED SNOW LEVEL.
CANADA: MUST CONFORM TO
MIN.
CSA B149.1-10, SECT. 8.14
DIRECT VENT VERTICAL TERMINATION DETAIL
12"/31cm MIN. ABOVE
GRADE OR HIGHEST
ANTICIPATED SNOW LEVEL.
8"/20cm
CANADA: MUST CONFORM TO
MIN.
48" MAX. 45" MAX. CSA B149.1-10, SECT. 8.14
(122 cm) (114 cm)
3" MIN.
*
(8 cm)
*3" (8cm) minimum only if no snow accumulation is anticipated.
3"/8cm
MAX.
NOTE: IF 3 Ø
VENTING IS
USED, BOTH
PIPES (INTAKE
AND EX-
TERMINATIONS
HAUST) MUST
MUST BE GREATER
BE REDUCED
THAN 8" APART.
TO 2 Ø
3" (8cm) MIN.
BEFORE
12" (32cm) MAX.
PENETRATING
ROOF.
See
A
ST-A1194-22
ST-A1194-21
DETAIL A
12" (31cm) U.S.
36" MAX. CANADA: TERMINATIONS
(91 cm) MUST CONFORM TO
CSA B149.1-10, SECT. 8.14
NOTE: IF 3 Ø
VENTING IS USED,
BOTH PIPES (INTAKE
AND EXHAUST) MUST
BE REDUCED TO 2 Ø
BEFORE PENETRATING
ROOF.
ST-A1194-18
DETAIL A
GUIDELINES
FIGURE 28
TWO FURNACE VENTING WITH CONCENTRIC VENTING
CONCENTRIC VENTING THROUGH ROOF
A
SEE
SEE
MINIMUM 12"/31cm IN
U.S. ABOVE AVERAGE
SNOW ACCUMULATION.
MAXIMUM OF 24"/61cm
ABOVE ROOF.*
MINIMUM 12"/31cm IN
U.S. ABOVE AVERAGE
SNOW ACCUMULATION.
MAXIMUM OF 24"/61cm
ABOVE ROOF.*
CONCENTRIC VENTING THROUGH WALL
6' (1.8m) MINIMUM
10' (3m) RECOMMENDED
MINIMUM 12"/31cm
ABOVE GRADE IN U.S.
6' (1.8m) MINIMUM
10' (3m) RECOMMENDED
MINIMUM 12"/31cm
ABOVE GRADE IN U.S.
A
SEE
*
CANADA: TERMINATION MUST CONFORM TO CSA B149.1-10,
A
SECT 8.14.
SEE
A
2 FURNACES
➀ Terminations must be greater than 8" apart.
Terminations must be less than 24" apart or greater than
36" apart.
3rd OR MORE FURNACES
Each additional termination must be greater than 48" from
the previous termination.
A
*
*
ST-A1194-22
41