Note: The framed depth, 25 ⁵⁄₈" (651 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.

Consult all local codes.

FRAMING SPECIFICATIONS

Header

B

A

Fireplace Framing

Figure 10

Back Wall of Chase/Enclosure

Outside

Including Finising Materials if any

Air Kit

Framing Dimensions

Back Wall of

Optional

Outside

 

 

Chase/Enclosure

Drainage Line

Air Kit

Fireplace Opening Width

Including Finishing

 

 

 

Materials if any

 

 

 

 

LSO-43

D

 

 

 

 

 

K

 

 

 

A

52 ⁷⁄₈" (1343 mm)

 

 

 

F

 

 

 

 

B

50" (1270 mm)

C

 

 

 

 

 

 

 

 

C

31 ³⁄₄" (806 mm)

A

 

 

 

E

 

 

 

 

 

 

 

 

Rough

D

15 ⁷⁄₈" (403 mm)

Corner Installation

 

Framing Face

(Unfinished Shown)

E

82" (2083 mm)

Figure 12

 

 

 

 

 

 

 

F

41" (1041 mm)

Back Wall of Chase/Enclosure

 

Optional

Outside

 

 

Including Finishing

 

Drainage

Air Kit

G

25 ⁵⁄₈" (651 mm)

Materials if any

 

Line

 

 

 

 

 

J

13 ⁷⁄₈" (352 mm)

G

 

 

 

 

 

 

 

 

K

58" (1473 mm)

 

 

 

J

Note: All framing dimensions calculated for 1/2"

A

 

 

 

Rough Framing Face

 

 

 

dry wall at the fireplace face. If sheathing the

 

Outside Chase

chase or finishing with other thickness materials,

(Unfinished Shown)

 

 

 

 

 

calculations will

need to be made.

 

 

 

 

Figure 13

Framing Dimensions for Ceiling

 

Flue Type

A

B

B

FTF10 Vertical

19"

19"

 

 

(483 mm)

(483 mm)

 

FTF10

19"

29"

A

Offset 30°

(483 mm)

(737 mm)

Ceiling Framing

 

 

 

Figure 14

A

Inside Chase

Figure 11

G

Rough

Framing Face

(Unfinished

Shown)

Framing Dimensions for Roof

 

 

Pitch

C

D*

 

 

0/12

19"

19"

 

 

 

(483 mm)

(483 mm)

 

 

6/12

19"

22"

 

 

 

(483 mm)

(559 mm)

 

 

12/12

19"

27"

D

C

 

(483 mm)

(686 mm)

 

 

 

 

* Perpendicular to roof ridge

 

Roof Framing

 

 

 

Figure 15

 

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

7

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Lennox Hearth LSO-43 installation instructions Framing Specifications, FTF10
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LSO-43 specifications

The Lennox Hearth LSO-43 is a state-of-the-art gas fireplace that combines aesthetics with functionality, making it a popular choice for modern homeowners. This fireplace stands out due to its sleek design, efficient heating capabilities, and advanced technologies, ensuring that it not only enhances the ambiance of any living space but also provides warmth and comfort.

One of the main features of the LSO-43 is its contemporary design. With a wide viewing area and clean lines, it serves as a stunning focal point in any room. The fireplace is available in various finishes, allowing homeowners to choose a style that complements their decor. The large glass front provides an unobstructed view of the flames, creating an inviting atmosphere, whether used for cozy gatherings or quiet evenings at home.

In terms of technology, the LSO-43 employs a powerful heating system that ensures optimal warmth. It utilizes a high-efficiency burner that enhances the flame’s realism while maximizing heat output. This eco-friendly setup operates with minimal emissions, meeting stringent environmental standards. The unit also has a variable speed blower that effectively distributes heat throughout the room, ensuring consistent comfort.

Another notable characteristic of the Lennox Hearth LSO-43 is its ease of use. It comes with an intuitive remote control that allows homeowners to adjust flame height and heat settings at the touch of a button. Additionally, the fireplace can be operated with a wall switch, offering flexibility and convenience. This user-friendly design makes it accessible for everyone, from tech-savvy individuals to those who appreciate straightforward functionality.

Installation of the LSO-43 is relatively simple, as it can be vented through the wall or the roof, depending on the home’s layout. Moreover, it is compatible with various venting systems, which allows for flexible placement in both new constructions and existing homes.

Overall, the Lennox Hearth LSO-43 blends modern aesthetics with advanced heating technology. With its efficient energy use, stylish design, and user-friendly features, it presents an excellent option for anyone looking to enhance their living space with a gas fireplace. Whether for enjoying evenings with family or for entertaining guests, the LSO-43 promises warmth and elegance in any environment.
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