Lennox Hearth 32FS operation manual Determining Size Of Pipe To Install, Installation Chart

Determining Size Of Pipe To Install

To determine what diameter pipe to use in an installation (3” or 4”), first find the “equivalent pipe length” using the following guidelines, then plot this number and the altitude on the chart (Figure 13).

Fill out the installation chart, and calculate your total equivalent pipe length. After you have the total equivalent pipe length, use the Pipe Selection Chart below to determine if your installation requires 3” or 4” exhaust pipe.

Installation Chart

Type of Pipe	# of Elbows or		Equivalent Feet	Total Equivalent
	Feet of pipe			Feet
90° Elbows/		x	5 Feet (1.5 m)
Tee (A & G)
45° Elbows		x	3 Feet (1 m)
(C)
Horizontal		x	1 Feet (.3 m)
(B & F)
Vertical (E)		x	.5 Feet (.15 m)
Table 3
Sample Installation Chart
Type of Pipe	# of Elbows or		Equivalent Feet	Total Equivalent
	Feet of pipe			Feet
90° Elbows/	2	x	5 Feet (1.5 m)	10 (3 m)
Tee (A & G)
45° Elbows	1	x	3 Feet (1 m)	3 (1 m)
(C)
Horizontal	3	x	1 Feet (.3 m)	3 (1 m)
(B & F)
Vertical (E)	8	x	.5 Feet (.15 m)	4 (1.2 m)
Table 4 - Sample Chart for Figure 14

	30
(Feet)						4 “ Diameter Only
	20
Length
			3 or 4”
Pipe
	10		Diameter
Equivalent
	0
	0	1	2	3	4	5	6	7	8	9	10

Altitude x 1000 Feet

Figure 13 - Pipe Selection Chart

NOTE: All equivalent pipe styles shown for model Montage 32FS.

	B
A - 90 Degree Elbow	A
B - 1’ Horizontal Pipe
C - 45 Degree Elbow	C
D - Standoff Braces
E - 8’ Vertical Pipe
F - 2’ Horizontal Pipe	D
G - 90 Degree Tee
H - Wall Thimble	E

F

G

H

Figure 14 - See Sample Installation Chart

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE

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