C. Vertical Penetration Framing
WARNING
Fire Hazard
Keep loose materials or blown insulation from touching the vent pipe.
•National building codes recommend using attic shield to keep loose materials/ blown insulation from contacting vent.
•Hearth & Home Technologies requires the use of an attic shield.
Installing the Ceiling Firestop
•Frame an opening 10 inches by 10 inches whenever the vent system penetrates a ceiling/floor (see Figure 6.4).
•Frame the area with the same sized lumber as used in ceiling/floor joist.
•When installing a top vent vertical termination appliance the hole should be directly above the appliance, unless the flue is offset.
•Do not pack insulation around the vent. Insulation must be kept away from the pipe.
Installing Attic Shield
Note: An additional ceiling firestop is not required if attic shield is used.
• Frame opening for attic shield.
ATTIC ABOVE |
10 IN. (254 MM) |
10 IN. |
(254 MM) |
HOLE SHOULD MEASURE |
10 IN. X 10 IN. |
(254 MM X 254 MM) |
INSIDE TO INSIDE |
Figure 6.4 |
• Attic shield may be installed above or |
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| below ceiling (see Figure 6.5). |
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• Secure with three fasteners on each | BEND TABS IN |
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| side. | AROUND PIPE |
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• | Fold tabs at top of attic shield in toward | 3 FASTENERS |
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| vent pipe. Tabs must keep vent pipe | PER SIDE |
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| centered within shield. |
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• | Field construct additional shield height if |
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| insulation is deeper than height of attic | ATTIC SHIELD INSTALLED | ATTIC SHIELD INSTALLED |
| shield. | BELOW CEILING | ABOVE CEILING |
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| Figure 6.5 Installing the Attic Shield |
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| Heat & Glo • | 19 | |
