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Heat & Glo • SL-550 / 750 / 950TR-D • InD • 2044-985 Rev. M • 10/06
C. Vertical Penetration Framing
Installing the Ceiling Firestop
• Frame an opening 10 inches by 10
inches whenever the vent system pene-
trates a ceiling/fl oor (see Figure 6.4).
• Frame the area with the same sized
lumber as used in ceiling/fl oor joist.
• When installing a top vent vertical ter-
mination appliance the hole should be
directly above the appliance, unless the
fl ue is offset.
• Do not pack insulation around the vent.
Insulation must be kept away from the
pipe.
Figure 6.4
ATTIC
ABOVE
A
B
Fire Hazard
Keep loose materials or blown
insulation from touching the
vent pipe.
Installing Attic Shield
Note: An additional ceiling fi restop is not
required if attic shield is used.
• Frame opening for attic shield.
• Attic shield may be installed above or
below ceiling (see Figure 6.5).
• Secure with three fasteners on each
side.
• Fold tabs at top of attic shield in toward
vent pipe. Tabs must keep vent pipe
centered within shield.
• Field construct additional shield height if
insulation is deeper than height of attic
shield.
Figure 6.5 Installing the Attic Shield
• National building codes recommend us-
ing attic shield to keep loose materials/
blown insulation from contacting vent.
• Hearth & Home Technologies requires
the use of an attic shield.
A B
SL PIPE 10 in. 10 in.
3 FASTENERS
PER SIDE
BEND TABS IN
AROUND PIPE
ATTIC SHIELD INS TALLED
BELOW CEILING
ATTIC SHIELD INS TALLED
ABOVE CEILING
WARNING