Lennox Hearth 2-MN53-VDLPM, MN04-VDLPM, MN03-VDLPM, MP54-VDLPM, MP03-VDLPM Vent Section Length Chart

	VENT SECTION LENGTH CHART
Nominal		6		12	24	36		48	T
Section Length									O
(inches)									T
Net Section		4-1/2		10-1/2	22-1/2	34-1/2	46-1/2		A
Length (inches)									L
Height of Vent			Number of Vent Sections						Q
									T
inches	ft
									Y
4.5	0.375	1		0	0	0		0	1
9	0.75	2		0	0	0		0	2
10.5	0.875	0		1	0	0		0	1
15	1.25	1		1	0	0		0	2
19.5	1.625	2		1	0	0		0	3
21	1.75	0		2	0	0		0	2
22.5	1.875	0		0	1	0		0	1
25.5	2.125	1		2	0	0		0	3
31.5	2.625	0		3	0	0		0	3
34.5	2.875	0		0	0	1		0	1
37.5	3.125	1		1	1	0		0	3
43.5	3.625	0		2	1	0		0	3
45	3.75	0		0	2	0		0	2
46.5	3.875	0		0	0	0		1	1
49.5	4.125	1		0	2	0		0	3
51	4.25	1		0	0	0		1	2
55.5	4.625	0		1	2	0		0	3
57	4.75	0		0	1	1		0	2
66	5.25	0		2	2	0		0	4
67.5	5.625	0		0	3	0		0	3
69	5.75	0		0	0	2		0	2
72	6	1		0	3	0		0	4
73.5	6.125	1		0	0	2		0	3
79.5	6.625	0		1	0	2		0	3
81	6.75	0		0	0	1		1	2
90	7.5	0		2	1	0		1	4
91.5	7.625	0		0	2	0		1	3
93	7.75	0		0	0	0		2	2
96	8	1		0	1	2		0	4
97.5	8.125	1		0	0	0		2	3
102	8.5	2		0	0	0		2	4
103.5	8.625	0		0	0	3		0	3
108	9	1		0	0	3		0	4
114	9.5	0		2	0	0		2	4
117	9.75	1		0	5	0		0	6
118.5	9.875	1		1	0	3		0	5
126	10.5	0		0	1	3		0	4
130.5	10.875	1		0	1	3		0	5
135	11.25	0		0	6	0		0	6
138	11.5	0		0	0	4		0	4
139.5	11.625	0		0	0	0		3	3
142.5	11.875	1		0	0	4		0	5

		VENT SECTION LENGTH CHART
Nominal Section			6		12	24	36	48	T
Length (inches)									O
									T
Net	Section
			4-1/2		10-1/2	22-1/2	34-1/2	46-1/2	A
Length (inches)
									L
Height of Vent				Number of Vent Sections					Q
inches		ft							T
									Y
144		12	1		0	0	0	3	4
150		12.5	0		1	0	0	3	4
154.5		12.875	1		1	0	0	3	5
160.5		13.375	0		2	0	0	3	5
172.5		14.375	0		0	0	5	0	5
177		14.75	1		0	0	5	0	6
183		15.25	0		1	0	5	0	6
186		15.5	0		0	0	0	4	4
190.5		15.875	1		0	0	0	4	5
196.5		16.375	0		1	0	0	4	5
205.5		17.125	0		1	1	5	0	7
207		17.25	0		0	0	6	0	6
211.5		17.625	1		0	0	6	0	7
217.5		18.125	0		1	0	6	0	7
229.5		19.125	0		0	1	6	0	7
232.5		19.375	0		0	0	0	5	5
237		19.75	1		0	0	0	5	6
241.5		20.125	0		0	0	7	0	7
246		20.5	1		0	0	7	0	8
252		21	0		1	0	7	0	8
264		22	0		0	1	7	0	8
276		23	0		0	0	8	0	8
279		23.25	0		0	0	0	6	6
280.5		23.375	1		0	0	8	0	9
283.5		23.625	1		0	0	0	6	7
289.5		24.125	0		1	0	0	6	7
301.5		25.125	0		0	1	0	6	7
310.5		25.875	0		0	0	9	0	9
315		26.5	1		0	0	9	0	10
325.5		27.125	0		0	0	0	7	7
330		27.5	1		0	0	0	7	8
336		28	0		1	0	0	7	8
345		28.75	0		0	0	10	0	10
349.5		29.125	1		0	0	10	0	11
372		31	0		0	0	0	8	8
376.5		31.375	1		0	0	0	8	9
379.5		31.625	0		0	0	11	0	11
418.5		34.875	0		0	0	0	9	9
423		35.25	1		0	0	0	9	10
465		38.75	0		0	0	0	10	10

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Where required, a telescopic vent section (SV4.5LA) may be used to provide the installer with an option in installing in tight and confined spaces or where the vent run made up of fixed length pieces develops a joint in a undesirable location, or will not build up to the required length. The SV4.5LA Telescopic Vent Section has an effective length of from 1-1/2" (38 mm) to 7-1/2" (191 mm).

The SV4.5LA is fitted with a locking inclined channel end (identical to a normal vent sec- tion component) and a plain end with 3 pilot holes. Slip the plain end over the locking channel end of a standard SV4.5 vent com- ponent the required distance and secure with three #8 x 3/8" screws.

Maintain a minimum 1" (25 mm) clearance to combustible materials for all vertical vent elements.

Clearances for horizontal vent elements are 1" (25 mm) at the sides and 1" (25 mm) on the bottom. Clearances above horizontal vent elements are 3" (76 mm) for all models and all applications. Exception: Clearance is 5" (127 mm) for MPLDV35, MPLDV40 & MPLDV45, when the center line of the hori- zontal run is less than 48" (1219 mm) above the fireplace top wrapper surface.

The starter elbow may not be used if a 45 degree vent run is required directly off of the unit. Refer to Detail - Figure 17.

A.Attach Supplied 45 Degree Starter Elbow - Slip the plain end with 3 mounting holes over the locking channel end of the appliance collar and secure with three screws.

B.Support The Elbows - Support the starter elbow and the vertical portions of the venting system with support bracket as shown in Figure 23 - Detail A, on page 14. Do not use the starter elbow anywhere else in the vent system if not used on the appliance collar. SV4.5 rigid and flex components can be used directly off the collar. Do not return to rigid sections after using flex sections in a vent run.

C.Frame ceiling opening - Use a plumb line from the ceiling above the appliance to lo- cate center of the vertical run. Cut and/or frame an opening, 10-1/2" x 10-1/2" (267mm x 267mm) inside dimensions, about this center mark (Figure 14 ).

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