All Weather Roof Jack Assemblies, S O T, 27 45

a. Regardless of the location, the return air opening into the closet shall not be less than specified in the appliance’s listing.

b. Means shall be provided to prevent inadvert-

ent closure by a flat object placed over the

return air opening when it is located in the floor

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

f. Noncombustible pans having 1" upturned flanges are located beneath openings in a floor 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).

ROOF JACK

in the floor 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 floor or

ceiling registers serving the return air duct

PITCHED ROOF

SLANT DECK

FLASHING

"X" (SEE TABLE 1)

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 flame spread classification of

200 or less. This includes a closet door if the

furnace is in a closet.

	Approx. Length
Model Number	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"

	CEILING
	CAVITY
	"A"	ROOF
		OPENING
	CEILING	Flue Pipe
	CEILING	Combustion
	"B"	Combustion
		Air Pipe

Furnace

56" or 76"

Figure 6. Roof Jack Assemblies

(F,S)AW(T)3563-(0,2,4)(A,S)	35" - 63"
(F,S)AW(T)5195-(0,2,4)(A,S)	51" - 95"

27 47 - 2

FLUE STEEL TYPE

A= ALUMINIZED

F= FLAT FLASHING

S=STAINLESS

MIN. ADJ.

FLASHING

S= SLANT FLASHING

TYPE:

LENGTH

PITCH/12" RISE

AW= ALL WEATHER

BLANK=NON-TRANSIT

MAX. ADJ.

0=FLAT

T= TRANSIT MODE

LENGTH

2=2.5/12

4=4/12