Vent Clearances And Framing; Pipe Clearances To Combustibles; Wall Penetration Framing/Firestops - Heat & Glo MEZZO36 Installation Manual

5 5

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 fi restops
• Between wall shield fi restops
• Around vent system
Failure to keep insulation or other material away from
vent pipe could cause overheating and fi re.
Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38 mm).
DVP heat shield - designed to be used on a wall 4 in. to 7-1/4 in.
(102 mm to 184 mm) thick.
HSM-B will be required.
(DVP Pipe Shown)
Heat
Shield
3 in. (76 mm)
top clearance
1 in. (25 mm)
clearance around
vertical sections
Figure 5.1 Horizontal Venting Clearances To Combustible
Materials
Heat & Glo • MEZZO36, MEZZO36ST, MEZZO48, MEZZO48ST Installation Manual • 2300-970 Rev. T • 3/16
3 in. (76 mm)
top clearance *
Heat
Shield
1 in. (25 mm)
clearance
Wall
bottom & sides
Shield
Firestop
WALL
B. Wall Penetration Framing/Firestops
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must
frame a hole for the wall shield fi restop(s). The wall shield
fi restop maintains minimum clearances and prevents cold
air infi ltration.
• 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 fi restop must be placed on
each side of an interior wall. A minimum 1-1/2 in. (38
mm) overlap of attached heat shields must be main-
tained.
• See Section 7.F. for information for regarding the instal-
-
lation of a horizontal termination cap.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by non-com-
bustible materials such as concrete, a hole with diameter
one inch greater than the pipe is acceptable.
Note: Do not pack the gap with insulation.
Whenever a non-combustible wall is penetrated, the wall
shield fi restop is only required on one side and no heat
shield is necessary.
DO NOT PACK WITH
INSULATION OR
OTHER MATERIAL
10 in.
A
* 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.
Note: Measurements were taken with a 2 ft. vertical section of pipe directly
off the top of appliance.
Figure 5.2 Wall Penetration
12 in.
B
MODEL A*
MEZZO36
64 in.
MEZZ036ST
MEZZO48
MEZZ048ST
1.63 m
MEZZO60
MEZZO60ST
76 in.
MEZZO72
MEZZO72ST
1.93 m
B
63 in.
1.6 m
75 in.
1.90 m
31