Lennox Hearth Gas Stove User Manual
Page 14
14
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
h
orizontal
t
erminations
The shaded areas in the diagram below show all allow-
able combinations of vent configurations with horizontal
terminations. Horizontal sections of pipe require 1/4” of
rise for every 12” of run. A second 90 degree or 45 degree
elbow (in addition to the first 90 degree 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 below
then no restrictor is installed in the stove.
Combination of vertiCal and horizontal lengths Cannot exCeed 25’.
Straight Horizontal With No Vertical
Vision 25 LP 0-3’ horizontal.......................................Standard Horizontal Cap....................Use Light Obstructor
Vision 25 NG 0-3’ horizontal......................................Standard Horizontal Cap....................Use Light Obstructor
Vision 35 LP 0-3’ horizontal.......................................14” Snorkel Required.........................No Light Obstructor
Vision 35 NG 0-3’ horizontal......................................14” Snorkel Required.........................No Light Obstructor*
Offsets must remain within maximum and minimum lines.
To install the stove with pipe directly out the back, a snorkel
is not required for the Vision™ 25 gas stove. A snorkel is
required for the Vision 35 gas stove. See pages 12 & 13
for snorkel installation instructions.
v
ertiCal
t
erminations
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 indicated restrictor
positions. Offsets may consist of two 90 degree elbows OR
four 45 degree elbows.
1'
2'
3'
4'
5'
6'
7'
8'
9'
10
'
11'
12
'
13
'
14
'
15
'
16
'
17
'
1'
2'
3'
4'
5'
6'
7'
8'
9'
10'
11'
12'
13'
14'
15'
16'
17'
18'
19'
20'
21'
22'
23'
24'
25'
0'
0'
Venting configurations
may not terminate
outside this parameter.
Vision 25 standard cap
#3
#2
#1
#2
#1
#1
Vision 35 requires
14” snorkel
12'
13'
14'
15'
16'
17'
18'
19'
20'
13
'
14
'
16
'
17
'
15
'
2'
3'
6'
7'
8'
9'
10
'
11
'
12
'
4'
5'
5'
6'
7'
8'
9'
10'
11'
3'
4'
1'
0'
1'
2'
0'
18
'
19
'
20
'
21'
22'
23'
24'
25'
#3
#2
#2
#2
#1
#1
#1
Horizontal Terminations
Vertical Terminations
Figure 19
Figure 0