Lennox Hearth LSO-43 FTF10 OFFSET ELEVATION CHART, Installing Offsets, Underside Of Chimney

14

FTF10 OFFSET ELEVATION CHART

	A	B		FTF10-ES30		Number of FTF10			A	B
Offset		Height		Offset/Return	FTF10-S4	Chimney Sections			Offset	Height
(Inches)		(Inches)		Elbow Set	Stabilizer	12"	18"	36"	(mm)	(mm)
4		15	³⁄₄	1	0	0	0	0	102	400
9		24	¹⁄₂	1	0	1	0	0	229	622
12		29	³⁄₄	1	0	0	1	0	305	756
14	¹⁄₄	33	¹⁄₂	1	0	2	0	0	362	851
17	¹⁄₄	38	¹⁄₂	1	0	1	1	0	438	978
20	¹⁄₄	43	³⁄₄	1	0	0	2	0	514	1111
21		45	¹⁄₄	1	0	0	0	1	533	1149
22	¹⁄₄	47	¹⁄₂	1	0	2	1	0	565	1207
25	¹⁄₄	52	¹⁄₂	1	0	1	2	0	641	1334
26	¹⁄₄	54	¹⁄₄	1	0	1	0	1	667	1378
28	¹⁄₄	57	³⁄₄	1	0	0	3	0	718	1467
29	¹⁄₄	59	¹⁄₄	1	0	0	1	1	743	1505
31	¹⁄₄	63		1	0	2	0	1	794	1600
32	¹⁄₂	65		1	0	4	1	0	826	1651
34	¹⁄₄	68	¹⁄₄	1	0	1	1	1	870	1734
36	¹⁄₄	71	³⁄₄	1	0	3	0	1	921	1822
37	¹⁄₄	73	¹⁄₄	1	0	0	2	1	946	1861
38	¹⁄₄	75		1	0	0	0	2	972	1905
39	¹⁄₄	77		1	0	2	1	1	997	1956
41	¹⁄₂	80	¹⁄₂	1	0	1	4	0	1054	2045
43	¹⁄₄	83	³⁄₄	1	0	1	0	2	1099	2127
44	¹⁄₂	85	³⁄₄	1	0	3	1	1	1130	2178
45	¹⁄₄	87	¹⁄₂	1	0	0	3	1	1149	2223
46	¹⁄₄	89		1	0	0	1	2	1175	2261
48	¹⁄₄	91	¹⁄₂	1	0	2	0	2	1226	2324
49	¹⁄₂	94	¹⁄₂	1	0	1	5	0	1257	2400
51	¹⁄₄	97	³⁄₄	1	0	1	1	2	1302	2483
54	¹⁄₄	103		1	0	0	2	2	1378	2616
55	¹⁄₄	104	¹⁄₂	1	0	0	0	3	1403	2654
56	¹⁄₂	106	¹⁄₂	1	0	2	1	2	1435	2705
59	¹⁄₂	111	³⁄₄	1	0	1	2	2	1511	2838
62	¹⁄₂	116	³⁄₄	1	1	1	0	3	1588	2965
65	³⁄₄	122		1	1	0	1	3	1664	3099
67	³⁄₄	125	¹⁄₂	1	1	2	0	3	1721	3188
69	³⁄₄	128	¹⁄₂	1	1	1	3	2	1772	3264
70	³⁄₄	130	³⁄₄	1	1	1	1	3	1797	3321
73	³⁄₄	136		1	1	0	2	3	1873	3454
75	³⁄₄	139	¹⁄₂	1	1	2	1	3	1924	3543
79	³⁄₄	146	¹⁄₄	1	1	1	0	4	2026	3715
81		148	¹⁄₄	1	1	3	1	3	2057	3766
82	³⁄₄	151	¹⁄₂	1	1	0	1	4	2102	3848
87	³⁄₄	160	¹⁄₄	1	1	1	1	4	2229	4070

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Underside Of Chimney

Figure 36

FTF10-E30 Return Elbow*

Chimney Section (S)

FTF10-30 Offset Elbow* B

A

*Part of Offset/Return Package Model FTF10-ES30

Figure 37

INSTALLING OFFSETS

First, review the Offset Elevation Chart and Figure 37 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.