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4.1.1 minimum clearance to combustible enclosures
1" [25mm] minimum
all sides for sections
of vertical venting.
When passing through
a ceiling, use fi restop
spacer W500-0028
(not supplied)
0" to side standoffs
1/2" fi nishing fl ange
0" to bottom of the
appliance
Horizontal vent sections: A minimum clearance of 3" (76mm) on the top outside of the enclosure and 2"
(51mm) on the sides and bottom outside of the enclosure all around the vent pipe on all horizontal runs to com-
bustibles is required. Horizontal vent sections within enclosures require a minimum clearance of 6" (152mm) at the
top of the vent pipe.
Vertical vent sections: The fi rst 22" (55.8cm) of vertical vent pipe is shielded. A 1" (25mm) clearance to the
shield is required.
minimum clearance
Ref
L
note:
The TLV series requires a minimum enclosure/ceiling height, as illustrated (dimension L), measured from the
bottom of the appliance. For temperature requirements, this area must be left unobstructed. Some venting
confi gurations that require more vertical rise will require a larger enclosure to provide minimum vertical clearance
between vent pipes and combustibles.
rough framing - before appliance installation
L
TLV50
TLV62
73" (185.4cm)
note:
Shaded components (fi nish framing) must
be non-combustible materials.
3" [76mm] (minimum all sides
for sections of horizontal vent-
ing) outside of enclosure.
6" [152mm] minimum
(inside enclosure)
TLV74
91" (231.1cm)
3" [76mm] top (outside
of enclosure)
2" [51mm] sides /
bottom (outside of en-
closure)
0" to non-combustible
fi nishing such as brick
and stone
When passing through
a wall, use fi restop
spacer W615-0162
(supplied with W010-
4178 fi restop spacer
assembly)
0" to back standoffs
W415-4121 / B / 04.20.23
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