8 Vent Clearances and Framing
A. Pipe Clearances to Combustibles
WARNING! Risk of Fire! Maintain air space clearance to vent. DO NOT pack insulation or other combustibles:
•Between ceiling firestops
•Between wall shield firestops
•Around vent system
Failure to keep insulation or other material away from vent pipe may cause over heating and fire.
Note: Heat shields MUST overlap by a minimum of
DVP heat shield - designed to be used on a wall 4 in. to
,f wall thickness is less than 4 in. the e[isting heat shields must be field trimmed. ,f wall thickness is greater than
(DVP Pipe Shown)
B. Wall Penetration Framing
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must frame a hole for the wall shield firestop(s). The wall shield firestop maintains minimum clearances and prevents cold air infiltration.
•The opening must be framed on all four sides using the same size framing materials as those used in the wall construction.
•DVP pipe - A wall shield firestop must be placed on each side of an interior wall. A minimum
mm)overlap of attached heat shields must be main- tained.
•See Section 10.K. for information for regarding the in- stallation of a horizontal termination cap.
Non-Combustible Wall Penetration
3 in. (76 mm) top clearance
1 in. (25 mm) clearance around vertical sections
Heat | 3 in. (76 mm) |
Shield | top clearance * |
| Heat |
| Shield |
| 1 in. (25 mm) |
Wall | clearance |
Shield | bottom & sides |
Firestop |
|
| WALL |
If the hole being penetrated is surrounded by noncom- bustible materials such as concrete, a hole with diameter one inch greater than the pipe is acceptable.
Whenever a
DO NOT PACK WITH
INSULATION OR
OTHER MATERIAL
Figure 8.1 Horizontal Venting Clearances To Combustible Materials
10 in.
A
12 in.
B
A* | B |
1.52 m | 1.49 m |
*Shows center of vent framing hole for top venting. The center of the hole is one (1) in. (25.4 mm) above the center of the horizontal vent pipe.
Figure 8.2 Wall Penetration
32 | Heat & Glo • RED40, RED40ST • |