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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
16
LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS
Figure 38
Figure 40
OFFSET CALCULATIONS
Step 1. Use Offset Chart to determine amount of
horizontal offset (A) and height (B) for various
chimney section assemblies.
Step 2. Use “Height of Chimney Only” column
in The Vertical Elevation Chart to determine
combinations of chimney used above return
elbow to achieve desired heights. Reference
Components Effective Height Chart in vertical
elevation chart section.
Step 3. Use Elevation Chart as job estimator only.
Add necessary firestop spacers and stabilizers
as required. Firestop spacers must be used as
shown in Figures 21 and 22 and stabilizers as
shown in Figure 27.
Figure 36
Stabilizer
A
1
20’ Max.
(6m)
B
1
10’ Max.
(3m)
Figure 37
A
1
C
1
B
1
B
2
C
2
A
2
A
1
C
1
B
1
B
2
C
2
A
2
Figure 39
FTF10 Chimney
Joints
No. 8 x 1/2" SMS
Screws Required at
Every Joint Past 6’
No Screw
s Required in
Joints for First 6’ of
Offset
4’ (1.2m)
6’ (1.8m)
Underside of Chimney
FTF10-E30*
Return Elbow
FTF10 Chimney
Section (s)
FTF10-30*
Offset Elbow
A
B
65-1/4"
(1657mm)
* Part of Offset/Return Package, Model FTF10-ES30