7
S O T 27 45 -5
S= SLAT FLASHING
F= FLAT FLASHING
O= TYPE; STANDARD
H= HIGH WIND
A= ARCTIC ROOF JACK
T= TRANSIT
MODE
TYPE
MIN. ADJ.
LENGTH
MAX. ADJ.LENGTH
5 = 5” FLUE DIA.
Table 5. Roof Jack Assemblies
a. Regardless of the location, the return air
opening into the closet shall not be less than
specifi ed in the appliance’s listing.
b. Means shall be provided to prevent inadvertent
closure by a fl at object placed over the return
air opening when it is located in the fl oor of
the closet (versus the vertical front or side
wall).
c. The cross-sectional area of the return duct
system leading into the closet, when located
in the fl oor or ceiling shall not be less than
235 square inches (or 390 square inches for
5 ton ready M1 Furnaces).
d. The total free area of openings in the fl oor or
ceiling registers serving the return air duct
system must be at least 235 sq. in. At least
one register should be located where it is not
likely to be covered by carpeting, boxes and
other objects.
e. Materials located in the return duct system
must have a fl ame spread classifi cation of
200 or less. This includes a closet door if the
furnace is in a closet.
f. Noncombustible pans having 1” upturned
fl anges are located beneath openings in a
fl oor duct system.
g. Wiring materials located in the return duct
system shall conform to Articles 300-22 of
the National Electrical Code (ANSI C1/NFPA-
70).
S
S
AW
T
27 47 - 2
AW= ALL WEATHER
FLASHING
PITCH/12" RISE
0=FLAT
2=2.5/12
4=4/12
MIN. ADJ.
LENGTH
F=
S=
FLAT FLASHING
SLANT FLASHING
TYPE:
BLANK=NON-TRANSIT
T= TRANSIT MODE
MAX. ADJ.
LENGTH
FLUE STEEL TYPE
A= ALUMINIZED
S=STAINLESS
All Weather Roof Jack Assemblies
Figure 6. Roof Jack Assemblies
ROOF JACK
SLANT DECK
FLASHING
PITCHED
ROOF
CEILING
CEILING
CAVITY
ROOF
OPENING
"X" (SEE TABLE 1)
Flue Pipe
Combustion
Air Pipe
56" or 76"
Furnace
"A"
"B"
Figure 7. Example of Flat Jack
with Flashing
Figure 8. Example of 2½/12 Slant Jack with
Flashing
MODEL NUMBER
APPROX. ADJ. LENGTHS BELOW
FLASHING
FO 1323-5
13’ - 23’
FO2343-5
23’ - 43’
SO1835-5
18’ - 35’
SO2447-5
24’ - 47’
SO3263-5
32’ - 63’
SO4895-5
48’ - 95’
SOT2442-5
24’ - 42’
SOT2745-5
27’ - 45’
SOT4581-5
45’ - 81’
SOT2846-5
28’ - 46’
MODEL NUMBER
APPROX. LENGTH
BELOW FLASHING
(F,S)AW(T)1523-(0,2,4)(A,S)
15” - 23”
(F,S)AW(T)2135-(0,2,4)(A,S)
21” - 35”
(F,S)AW(T)2747-(0,2,4)(A,S)
27” - 47”
(F,S)AW(T)3563-(0,2,4)(A,S)
35” - 63”
(F,S)AW(T)5195-(0,2,4)(A,S)
51” - 95”
