Less than 10' (3m)

3' (914mm)

Min.

Figure 41

TEN FOOT RULE SUMMARY

The minimum chimney height above the roof and/or to adjacent walls and buildings is speci-

2' (610mm) Min.

 

10' (3m)

3' (914mm)

 

Min.

18" (457mm)

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: CST/CPF Fireplace = 48" (1219 mm)

FTF8-12

=

10

¹⁄₄" (260 mm)

FTF8-18

=

16

¹⁄₄" (413 mm)

FTF8-36

=

34

¹⁄₄" (870 mm)

FTF8-48

=

46

¹⁄₄" (1175 mm)

CTD Termination

=

4" (102 mm)

CT1 Termination

=

18" (457 mm)

CT2 Termination

=

15" to 23"

fied 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 hori-

24"

(610mm)

Figure 42

18" (457mm)

24" (610mm)

 

 

(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

zontally 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 (see Figure 41 ).

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 42 ).

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.

FTF8 CHIMNEY COMPONENTCALCULATIONS

The minimum installed height of the CST and CPF fireplace systems (including fireplace and chimney components) is 15' (4.6 m). 25' (7.6m) 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.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

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 Chimneys 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.

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