Lennox Hearth LSO-43 installation instructions Hearth Extensions and Wall Shields

Page 16

12" Min.

Combustible

12"

*

Mantel

Min.

Finished

Wall

Header

Spacer

Noncombustible Wall Covering

 

 

 

Hearth Extension Dimensions

 

 

 

Opening Width

43"

 

 

 

A

20" (508 mm)

 

 

 

B

43" (1092 mm)

C

B

C

 

 

 

 

A

C

12" (305 mm)

 

D

 

 

 

 

 

 

 

 

D

62" (1575 mm)

Figure 41

16

Fireplace Opening

U.S. Installation

*A 1¹⁄₂” Projection Is Permitted Between The Face Top And Mantle, 8” Minimum Above Door Opening

Figure 40

Hearth Extensions and Wall Shields

A hearth extension must be installed with all fireplaces. It is to protect the combustible floor in front of the fireplace from both radiant heat and sparks. The hearth exten- sion must extend beyond the front at least 20" (508 mm) and both sides at least 12" (305 mm) (Figure 41 ). Use a hearth extension constructed of a durable noncom- bustible material having an equal or better (lower k value) insulating value of k = .84 BTU IN/FT2 HR ° F or a thermal resistance that equals or exceeds r = 1.19 HR ° F FT2/ BTU IN. With these values, determine the minimum thickness/material required using the formula and Page 17.

Note: Any noncombustible material whose k value is less than .84 or whose r value is more than 1.19 is acceptable.

If the fireplace is installed on a combustible floor, use the metal safety strips (provided) on the floor extending half under the fire- place and half under the hearth extension.

A wall shield is required where a continuous perpendicular side wall is within 18" of the fireplace opening (Figure 42 ). Use a 40" W x 40" H wall shield constructed of a durable, noncombustible material having an equal or better (lower k value) insulating value than k =

.84 BTU IN/FT2 HR ° F. At no time may a perpendicular side wall be located closer than 12" from the fireplace opening.

If fireplace is installed diagonally across a 90° corner; no wall shields are required.

Methods of Determining Hearth Extension and Wall Shield

Equivalents - To determine the thickness required for the alternate material when either the “k” value or “r” value is known, use either the k formula or r formula.

Example: If Micore 160 is to be used for the hearth extension fireplace, how thick must this material be?

kM = k value per inch of alternate material rM = r value per inch of alternate material

TM = minimum thickness required for alternate material TS = standard thickness of the alternate material

kL = k value per inch of listed material rL = r value per inch of listed material

TL = minimum thickness of listed material

Note: An asterix “*” indicates, it is a value taken from Table 1.

Using the k formula:

Minimum

 

k-value (per Inch) of

 

Specified min.

thickness of

=

alternate material (kM) x

thickness

alternate

 

k-value (per inch)

 

of listed

material (TM)

 

of listed material (kM)

 

material (TL)

TM (inches)

=

kM

 

x

TL

 

 

*.84

 

 

 

TM (inches)

=

*.35

 

x

1"

 

*.84

 

 

 

 

 

 

 

 

.416 (inches) =

.416

 

x

1"

Answer - The minimum required thickness of the Micore 160 is .417”, therefore round up to nearest standard thickness available which is 1/2”.

Using the r formula:

Minimum

 

r-value (per Inch)

 

Specified min.

thickness of

=

of listed material

x

thickness

alternate

 

r-value (per inch)

 

of listed

material

 

of alternate material

 

material

TM (inches)

=

rL

x

TL

 

 

rM

 

 

 

TM (inches)

=

*1.19

 

x

1"

 

*2.86

 

 

 

 

 

 

 

 

.416 (inches) =

.416

 

x

1"

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Page 15 Page 17
Image 16
Page 15 Page 17
Contents OTL Report No -F-01-2 Retain These Instructions For Future ReferenceWood Burning Outdoor Fireplace P/N 850,015M REV. C 03/2007 Table of Contents Typical Free Standing Installation IntroductionGeneral Information Clearances and Height RequirementsAssembly Outline Assembly StepsPRE-INSTALLATION Notes Chimney SystemInstalling the Fireplace Waterproofing the FireplaceAir Inlet ClearancesFireplace Specifications Front ViewSide View Left Top ViewFraming Specifications FTF10Installing the Chimney System FeetChimney 30 Offset Through Floor Or CeilingSpace 10 3m Max Firestop Space Above Using a FTF10-CT1 Chase Termination Using a FTF10-CT2 Chase TerminationUsing a FTF10-CTDT Chase Termination Roof Pitch Model Flat to 6/12TEN Foot Rule Summary Multiple TerminationsFTF10 Chimney Component Calculations Special Offset Instructions Offset CalculationsFTF10 Vertical Elevation Chart HeightChimney Only Chimney OnlyFTF10 Offset Elevation Chart Installing OffsetsFirst, review the Offset Elevation Chart and for reference Underside Of ChimneyOptional Equipment Considerations Fireplace FinishesHearth Extensions and Wall Shields Value = 1/k = r x thickness of material used RM = rM x TS = 0.05 x 3/4 =RM = rM x TS = 0.20 x 1/2 = ShieldInstallation Components Finish to Your TasteModel Catalog Number LSO-43Round Termination 63L43 Firestop Spacer Flat 63L36Combination Offset/Return Elbow 63L34 Offset/ Return Package 63L23850,015M REV. C 03/2007 Orange, CA

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.
Top Page Image Contents