Flex Vent
The flex vent must be supported with the spacing between support intervals not exceeding 4 feet, with no more than ½ inch sag between supports.
A support is required at each change in venting direction, and in any location where it is necessary to maintain the necessary clearance to combustibles. A simple “up and out” installation (Figure 9) requires only enough support to main- tain the necessary clearance to combustibles. However, the vent attachment point and the firestop location are consid- ered to be supports.
STRAIGHT UP
VERTICAL VENTING
V(FT.) 45' MAX.
NOTE: For vertical venting over 20 feet a restrictor plate is recommended for improved flame appearance.
CAP
V
3” CLEARANCE
TERMINATION
CAP
1”
CLEARANCE
Use SL
Figure 10.
Figure 9.
Straight up Vertical Venting
STRAIGHT OUT HORIZONTAL VENTING
H
Max. Run
36" (914 mm)
WITH TWO 900 ELBOWS
| Use two 900 elbows for corner installations. |
|
| The use of two 900 elbows in a corner installa- | |
H | tion will affect space requirements (see Fig. | 4) |
Figure 11. Straight Out Horizontal Venting
Use DVP-Series
components only.
Heat & Glo • | 23 |