Lennox Hearth LBC-4324 Framing Specifications, Framing Dimensions for Ceiling, Flue Type

Note: The framed depth, 25-1/2" (648 mm) from a framed wall, must always be measured from a finished surface. If a wall covering such as drywall is to be attached to the rear wall, then the framed depth must be measured from the drywall surface. It is important that this dimension be exact.

If the appliance is to be elevated above floor level, a solid continuous platform must be constructed.

The header may rest on the top metal spacers, but must not be notched to fit around them.

Consult all local codes.

FRAMING SPECIFICATIONS

Header

Framing Dimensions

	Fireplace Opening Width
	38	43
A	48-1/8"	52-7/8"
	(1222 mm)	(1343 mm)
B	50"	50"
	(1270 mm)	(1270 mm)
C	26-1/4"	31"
	(667 mm)	(787 mm)
D	13-1/8"	15-1/2"
	(334 mm)	(394 mm)
E	77-1/4"	82"
	(1962 mm)	(2083 mm)
F	38-5/8"	41"
	(981 mm)	(1041 mm)
G	25-1/2"	25-1/2"
	(648 mm)	(648 mm)
J	11"	11"
	(279 mm)	(279 mm)
K	54-5/8"	58"
	(1388 mm)	(1473 mm)

Back Wall of Chase/Enclosure

Including Finishing Materials

FOAK-4 Combustionif any Air Kit

D K

F

C

A

E

Rough

Corner InstallationFraming Face

(Unfinished Shown)

Figure 13

FOAK-4 Combustion	Back Wall of Chase/Enclosure
Air Kit	Including Finishing Materials
	if any

G

J

A

Rough Framing Face

(Unfinished Shown) Outside Chase

B

A

Fireplace Framing

Figure 11

FOAK	Back Wall of Chase/Enclosure
Combustion	Including Finising Materials if any
Air Kit

Figure 14

Note: All framing dimensions calculated for 1/2" dry wall at the fireplace face. If sheathing the chase or finishing with other thickness materials, calculations will need to be made.

Framing Dimensions for Ceiling			B
Flue Type	A	B
FTF10 Vertical	19"	19"	A
	(483 mm)	(483 mm)	Ceiling Framing
FTF10	19"	29"	Figure 15
Offset 30°	(483 mm)	(737 mm)
Framing Dimensions for Roof

A

Inside Chase

G

Rough

Framing Face

(Unfinished

Shown)

Pitch	C	D*
0/12	19"	19"
	(483 mm)	(483 mm)
6/12	19"	22"
	(483 mm)	(559 mm)	D	C

Figure 12

12/12	19"	27"	Roof Framing
	(483 mm)	(686 mm)
			Figure 16
* Perpendicular to roof ridge
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.			7