Lennox Hearth MP-36OD

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

INDOOR INSTALLATIONS - The minimum

installed height of the completed ﬁ replace

system for is 15' 0." The maximum height is

60' 0" (see Table 1).

OUTDOOR INSTALLATIONS - The minimum

installed height of the completed ﬁ replace

system is 7' 3." The maximum height is 60"

(see Table 2).

The ﬁ replace and chimney system must be

enclosed when installed in or passing through

a living area where combustibles or people may

come in contact with it. This is important to pre-

vent possible personal injury or ﬁ re hazard.

For questions, please call your distributor or

the manufacturer. Special restrictions apply to

the front and facing of the ﬁ replace and nearby

walls (See Pages 20, 21 & 22).

CHIMNEY SYSTEM

These ﬁ replaces are designed and code listed for

use with Security Chimneys FTF8 chimney Sys-

tem only. Always use Security Chimneys FTF8

chimney components with these ﬁ replaces. Do

not modify or alter these components as this

may cause a potential serious hazard and void

the Warranty.

Chimney Height - Indoor Installations

The total height of your completed ﬁ replace

system from the surface the ﬁ replace rests on

to the chimney top must not exceed 60' and

must also meet minimum height requirements.

Refer to the minimum system height chart (see

Table 1).

Chimney Height - Outdoor Installations

The total height of your completed ﬁ replace

system from the surface the ﬁ replace rests on

to the chimney top must not exceed 60' and

must also meet minimum height requirements.

Refer to the minimum system height chart (see

Table 2).

INDOOR INSTALLATIONS

Minimum System Height

Security's FTF8 Pipe

Vertical Installation 15' 0"

One Offsets 15' 0"

Two Offsets 25' 0"

Table 1

OUTDOOR INSTALLATIONS

Minimum System Height

Security's FTF8 Pipe

Vertical Installation 7' 3" 

One Offsets 15' 0"

Two Offsets 25' 0"

Table 2 - See following Notes

When complete these ﬁ replace systems consists

of ﬁ ve basic “sub-systems”:

1. The Fireplace

2. The Chimney and Termination

3. The Optional Glass Doors

4. The Optional Outside Air Kits

5. The Optional Weather Cover (for outdoor

installations)

CLEARANCES AND HEIGHT

REQUIREMENTS

The ﬁ replace may be placed on or near normal

construction materials*. The outside air kit,

ﬁ restop spacer and roof ﬂ ashing (not chase

ﬂ ashings) may be placed directly on or against

normal construction materials. **

A combustible mantel may be installed 12"

above the opening of the ﬁ replace as per NFPA

211-latest edition. In Canada, the minimum is

18" above the ﬁ replace opening.

* In the USA, the chimney and ﬁ replace outer

wrapper require a minimum 1"  air space

to insulation and construction materials.

 In Canada, the chimney and ﬁ replace outer

wrapper require a minimum 2" air space to

insulation and construction materials.

** Construction Materials:

• Framing Materials • Paneling

• Particle Board • Flooring

• Dry Wall • Plywood

• Noncombustible Insulating Materials

• Etc.

 Notes (Table 2)

• Outdoor ﬁ replace system less than 15 feet

height must be a minimum of 10 feet away

from a building or combustible structure.

The 10 foot rule applies on all cases (see

ten foot rule summary on Page 15).

• The system height may be reduced to a

single length of FTF8-48 pipe and termination

with either the FTF8-CTD or FTF8-CTDT for

a minimum height on a complete system of

7' 3." The ﬁ replace must be installed as a

Freestanding system and located a minimum

of 10' away from any building or structure

(refer to Figure 1).

• The minimum height will vary when using

other Firecraft or Lennox Terminations.

Chase Enclosure

A chase is a vertical box-like structure con-

structed to surround the ﬁ replace and chimney.

Refer to Figure 4 for a typical chase conﬁ gura-

tion. As with all chimney installations, avoid

overhead obstructions such as trees, power

lines, etc. A chase should be constructed and

insulated just like any outside wall. In a cold

climate, we recommend the base of the chase

should also be insulated between the solid

continuous ﬂ oor beneath the ﬁ replace and the

chase bottom. Chase insulation in a cold climate

installation is not required for safety.

Note: Do not insulate the chase cavity with

blown or ﬁ ll type insulation materials.

Note: Local codes may not require ﬁ restopping

at the ceiling levels for outside chase installa-

tions. However, it is recommended for safety

and the reduction of heat loss.

ASSEMBLY OUTLINE

Before You Start

Check your inventory list to be sure you have

all the necessary parts supplied in good us-

able condition. Check also for any concealed

damage.

Check the operation of the damper. The damper

is controlled through the use of a control lever

located within the ﬁ rebox opening at the top

center in front of the ﬁ rebox lintel (Figure 3).

The control lever snaps into place at either

extreme of its range of motion. When locked

in position all the way to the right, the damper

is open. When locked in position all the way to

the left, the damper is closed.

WARNING

Failure to use manufacture provided parts, variations in techniques and construction materials or practices other than those described in this manual may create a ﬁ re hazard and void the limited warranty.

AVERTISSEMENT

L’échec d’utiliser la fabrication les parties fournies, les varia-tions dans les techniques et le matériel de construction ou les pratiques autre que ceux-là ont décrit dans ce manuel peut créer un risque d’incendie et un vide la garantie limitée.