Lennox DTH3530

Page 17
DT/DTH HORIZONTAL VENTING FIGURES
HORIZONTAL VENTING USING ONE 90 _ ELBOW
(DT/DTH - Top Vent Units)
VH
*1 ft. min.
3ft.max.
2ft.min.
4ft.max.
3ft.min.
6ft.max.
4ft.min.
8ft.max.
5 ft. min. 17 ft. max.
20 ft. max. 17 ft. max.
V
H
Firestop/Spacer must be used any
time vent pipe passes through
combustible floor or ceiling or wall.
**NOTE: THE LONGEST LENGTH OF FLEX AVAILABLE
IS 48 INCHES OF COMPRESSED FLEX.
* 10-1/2 in. min. for flexible vent pipe.
RIGID VENT PIPE SHOWN; **FLEXIBLE VENT
PIPE MAY ALSO BE USED.
Rectangular termination shown;
round termination may also be used.
FIGURE 23
HORIZONTAL VENTING USING TWO 90 _ ELBOWS
(DT/DTH - Top Vent Units)
V1
*1 ft. min.
2ft.min.
3ft.min.
4ft.min.
5ft.min.
H1 + H2
3ft.max.
6ft.max.
9ft.max.
12 ft. max.
15 ft. max.
V1
H1
H2
6ft.min.
17 ft. max.
20 ft. max. 17 ft. max.
Firestop/Spacer must be used any
time vent pipe passes through
combustible floor or ceiling or wall.
RIGID VENT PIPE SHOWN; **FLEXIBLE VENT
PIPE MAY ALSO BE USED.
* 10-1/2 in. min. for flexible vent pipe.
**NOTE: THE LONGEST LENGTH OF FLEX AVAILABLE
IS 48 INCHES OF COMPRESSED FLEX.
Rectangular termination shown;
round termination may also be used.
FIGURE 24
HORIZONTAL VENTING USING THREE 90 _ ELBOWS
(DT/DTH - Top Vent Units)
V1 + V2
2ft.min.
3ft.min.
4ft.min.
5ft.min.
6ft.min.
H1 + H2
4ft.max.
6ft.max.
8ft.max.
15 ft. max.
17 ft. max.
V1
H1
H2
V2
20 ft. max. 17 ft. max.
Firestop/Spacer must be used any
time vent pipe passes through
combustible floor or ceiling or wall.
RIGID VENT PIPE SHOWN; *FLEXIBLE VENT
PIPE MAY ALSO BE USED.
*NOTE: THE LONGEST LENGTH OF FLEX AVAILABLE
IS 48 INCHES OF COMPRESSED FLEX.
Rectangular termination shown;
round termination may also be used.
FIGURE 25