Vent Clearances And Framing; Pipe Clearances To Combustibles; Wall Penetration Framing - Heat & Glo VRT-BZ-N-AUB Owner's Manual

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 1-1/2 in. (38 mm).
• If wall thickness is less than 4 in. (102 mm) the existing heat shields must be field
trimmed.
3 in. (76 mm)
top clearance
1 in. (25 mm)
clearance around
vertical sections
Heat
Shield
* When using SLP pipe, minimum clearances from the vent pipe to combustible
materials at inside wall firestops are:
Figure 8.1 Horizontal Venting Clearances To Combustible Materials
37
Heat
3 in. (76 mm)
Shield
top clearance *
Heat
Shield
1 in. (25 mm)
clearance
Wall
bottom & sides
Shield
Firestop
WALL
3 in. (76 mm)
top clearance *
Heat
Shield
1 in. (25 mm)
Wall
clearance
Shield
bottom & sides
Firestop
WALL
Top: 2-1/2 in. (64 mm)
Bottom: 1/2 in. (13 mm)
Sides: 1 in. (25 mm)
Heat & Glo • VRT-AUB • 2123-980_R14 • 12/14
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.
• SLP pipe - A wall shield firestop must be placed on each
side of an interior wall. A minimum 1-1/2 inch (38 mm)
overlap of attached heat shields must be maintained.
• See Section 10.H for information for regarding the
installation of a horizontal termination cap.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by noncombustible
materials such as concrete, a hole with diameter one inch
greater than the pipe is acceptable.
Whenever a non-combustible wall is penetrated, the wall
shield firestop is only required on one side and no heat
shield is necessary.
Note: A 6 in. (152 mm) section of straight flue must be attached
to the fireplace before a 90° elbow.
* Unit shown with 1-1/2 ft. (457.2 mm) of
vertical pipe. Vertical section will vary by gas.
Refer to vent chart for minimum vertical.
10 in.
(254 mm)
10 in.
(254 mm)
A*
B*
Inches
VRT-N-AUB
Millimeters
Inches
VRT-P-AUB
Millimeters
* Shows center of vent framing hole for top or rear 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
10 in. C
(254 mm)
D
10 in.
(254 mm)
A* B* C D
69.3 34-3/4 68.3 33-3/4
1761 883 1736 857
69.3 34-3/4 68.3 33-3/4
1761 883 1736 857