Horizontal Terminations; Vertical Terminations - Lennox Elite Series Installation And Operation Manual

Horizontal Terminations

The shaded areas in the diagram below show all allowable combinations
of vent configurations with horizontal terminations. Horizontal sections
of pipe require 1/4" of rise for every 12" of run. A second 90° or 45°
elbow (in addition to the first 90° elbow at the top of the vertical length
of pipe) is allowed as long as the overall length of the horizontal run of
pipe does not exceed those shown below. Use the restrictor positions
indicated. Note that if the termination cap falls in the unshaded area, then
no restrictor is installed in the stove.
A
20
18
16
14
12
10
8
6
4
2
HORIZONTAL DISTANCE (FT)
HORIZONTAL DISTANCE (FEET)
Figure 25
16
RESTRICTOR POSITIONS
B C
8' MAX
19' 7" MAX VERT. WITH
8' HORIZONTAL
MIN. 24" VERT. PIPE SECT.
WITH 9" HORIZONTAL SECT.
2 4 6 8

Vertical Terminations

The diagram below shows all allowable combinations of straight vertical
and offset to vertical vent configurations with vertical terminations. The
termination must fall within the shaded areas on the diagram. Use the
restrictor positions indicated. Offsets may consist of two 90° elbows
OR four 45° elbows. The minimum termination height is 10 feet and the
maximum is 30 feet.
NOTE: Horizontal pipe requires 1/4" rise for every 12" of run. Offsets
must remain within max and min lines. Vertical height is measured
from the bottom of stove.
D
30' MAX
Figure 26
6' MAX
30
28
26
24
22
20
2' (MIN) OF
VERTICAL PIPE
REQUIRED BELOW
18
TERMINATION
16
14
12
10
8
6
4
2
2
HORIZONTAL DISTANCE (FT)
HORIZONTAL DISTANCE (FEET)
4 6 8