Offset Elevation Chart; Installing Offsets - Lennox Hearth Products Elite LBC-3824 Installation Instructions Manual

A B
Offset Height
(Inches) (Inches)
4 15
9 24
12 29
14 33
17 38
20 43
21 45
22 47
25 52
26 54
28 57
29 59
31 63
32 65
34 68
36 71
37 73
38 75
39 77
41 80
43 83
44 85
45 87
46 89
48 91
49 94
51 97
54 103
55 104
56 106
59 111
62 116
65 122
67 125
69 128
70 130
73 136
75 139
79 146
81 148
82 151
87 160
14
FTF10 OFFSET ELEVATION CHART
FTF10-ES30 Number of FTF10
Offset/Return FTF10-S4 Chimney Sections
Elbow Set Stabilizer 12"
1 0 0
1 0 1
1 0 0
1 0 2
1 0 1
1 0 0
1 0 0
1 0 2
1 0 1
1 0 1
1 0 0
1 0 0
1 0 2
1 0 4
1 0 1
1 0 3
1 0 0
1 0 0
1 0 2
1 0 1
1 0 1
1 0 3
1 0 0
1 0 0
1 0 2
1 0 1
1 0 1
1 0 0
1 0 0
1 0 2
1 0 1
1 1 1
1 1 0
1 1 2
1 1 1
1 1 1
1 1 0
1 1 2
1 1 1
1 1 3
1 1 0
1 1 1
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
A B
Offset Height
18" 36" (mm) (mm)
0 0 102 400
0 0 229 622
1 0 305 756
0 0 362 851
1 0 438 978
2 0 514 1111
0 1 533 1149
1 0 565 1207
2 0 641 1334
0 1 667 1378
3 0 718 1467
1 1 743 1505
0 1 794 1600
1 0 826 1651
1 1 870 1734
0 1 921 1822
2 1 946 1861
0 2 972 1905
1 1 997 1956
4 0 1054 2045
0 2 1099 2127
1 1 1130 2178
3 1 1149 2223
1 2 1175 2261
0 2 1226 2324
5 0 1257 2400
1 2 1302 2483
2 2 1378 2616
0 3 1403 2654
1 2 1435 2705
2 2 1511 2838
0 3 1588 2965
1 3 1664 3099
0 3 1721 3188
3 2 1772 3264
1 3 1797 3321
2 3 1873 3454
1 3 1924 3543
0 4 2026 3715
1 3 2057 3766
1 4 2102 3848
1 4 2229 4070
Underside Of Chimney
Figure 40
FTF10-E30 Return Elbow*
Chimney Section (S)
FTF10-30 Offset Elbow*
A
*Part of Offset/Return Package Model FTF10-ES30
Figure 41

INSTALLING OFFSETS

First, review the Offset Elevation Chart and
Figure 41 for reference.
Step 1. Determine the offset distance where
chimney is to pass through the first ceiling-
dimension "A." To find this point on your ceil-
ing, first determine the center point for a verti-
cal chimney following the instructions for ver-
tical installation.
Measure height to the ceiling from the top of
fireplace-dimension "B." Use the appropriate
Offset Elevation Chart to find dimension "A."
Mark point where you will drive your nail to
show the center point for your offset ceiling cut.
Step 2. Proceed by using the Straight Up Instal-
lation Instructions for cutting and framing ceil-
ing and roof openings.
Note: See Framing and Dimension Chart for
the sizes of the ceiling and roof openings. The
size of the roof opening varies with the degree
of pitch of the roof.
B