Less Than 10' (3m)

2' Min. (610mm) 2' Min. (610mm)

2' Min.

(610mm)

2.Determine the number of chimney compo- nents required, except chimney sections. This would include firestop spacers, stabilizers, roof flashing, etc.

3.The effective heights of the components are:

LS43ST Fireplace = 58 ¹⁄₂" (1486 mm)

Figure 33

TEN FOOT RULE SUMMARY

The minimum chimney height above the roof and/or to adjacent walls and buildings is specified by all major building codes.

If the horizontal distance from the peak of the roof is less then 10' (3 m), the top of the chimney must be at least 2' (610 mm) above the peak of the roof.

If the horizontal distance from the chimney edge to the peak of the roof is more than 10' (3 m), a chimney height reference point is established on the roof surface located horizontally 10' (3 m) from the chimney edge. The top of the chimney must be at least 2' (610

mm)above this reference point. In all cases, the chimney cannot be less then 3' (914 mm) above the roof at the edge of the chimney.

The 2' in 10' rule is necessary in the interest of safety, but does not ensure smoke-free opera- tion. Trees, buildings, adjoining roof lines, adverse wind conditions, etc., may require a taller chimney should the fireplace not draft properly (Refer to Figure 33 ).

MULTIPLE TERMINATIONS

If more than one termination is located in the same chase or within the same general prox- imity, we suggest they should be separated in distance at least 24" (610 mm) horizontally from flue center to flue center and stacked or staggered vertically at least 18" (410mm) apart, from the termination of one smoke exit to the termination of another smoke exit (Figure 34 ).

3' Min.

(916mm)

18" (457mm)

18" (457mm)

24" (610mm)

Figure 34

This suggestion is provided in the interest of better operation. If the terminations are located too close to each other, smoke may migrate from one flue into the other.

FTF13 CHIMNEY COMPONENT CALCULATIONS

The minimum installed height of the LS43ST fireplace system (including fireplace and chimney components) is 15' (4.6 m). 22' (5.6m) with two offsets. The maximum system height is 80' (24.4 m).

To determine the number of chimney sections and chimney components required, follow these steps:

1.Determine total vertical height of the fire- place installation. This dimension is measured from the surface the fireplace sets on to the point where smoke exits from the termination.

FTF13-12

=

10 ¹⁄₄" (260 mm)

FTF13-18

=

16 ¹⁄₄" (413 mm)

FTF13-36

=

34 ¹⁄₄" (870 mm)

CTD Termination

=

4" (102 mm)

CT1 Termination

=

18" (457 mm)

CT2 Termination

=

15" to 23"

 

 

(381 mm – 584 mm)

CTDT Termination

=

12" to 18"

 

 

(305 mm – 457 mm)

S4 Stabilizer *

=

3" (76 mm)*

*Required for every 30' (9.1 m) of vertical chimney and 10' of offset chimney.

4.Determine amount of chimney height re- quired by subtracting total combined height of all pre-selected components (fireplace and chimney components from total desired height.)

Reference Vertical Elevation Chart and determine the number of chimney sections (quantity and length) required.

SPECIAL OFFSET INSTRUCTIONS

To clear any overhead obstructions, you may offset your chimney system using Security's 30° offset and return elbows. Use two elbows - an offset elbow to initiate the offset and a return elbow to terminate it. A 30° offset elbow, angling in any direction, may be the first component used off the top of the fireplace flue collar.

12

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.