E. Use of Flex Vent
The flex vent must be supported with the spacing between support intervals not exceeding 4 feet, with no more than 1/2 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 (Fig- ure 7.3) requires only enough support to maintain the necessary clearance to combustibles. However, the vent at- tachment point and the firestop loca- tion are considered to be supports.
| TERMINATION |
3 in. CLEARANCE | CAP |
1 in.
CLEARANCE
Figure 7.3
24 | Heat & Glo • |
