C. Install the Ceiling Firestop

A ceiling firestop MUST be used between floors and attics.

DVP Pipe only - Frame an opening 10 in. by 10 in. (254 mm by 254 mm) whenever the vent penetrates a ceiling/floor (see Figure 8.3).

SLP Pipe only - Frame an opening 9 in. by 9 in. (229 mm x 229 mm) whenever the vent penetrates a ceiling/floor (see Figure 8.3).

Frame the area with the same sized lumber as used in ceiling/floor joist.

The ceiling firestop may be installed above or below the ceiling joists when installed with a attic insulation shield. It must be under joists between floors that are not insulated. Refer to Figure 8.4.

Secure with three fasteners on each side. WARNING! Risk of Fire. DO NOT pack insu- lation around the vent. Insulation must be kept back from the pipe to prevent overheating.

ATTIC ABOVE

A

 

A

PIPE

A

DVP

10 in. (254 mm)

SLP

9 in. (229 mm)

Figure 8.3 Installing Ceiling Firestop

 

INSTALL ATTIC INSULATION SHIELDS

 

BEFORE OR AFTER INSTALLATION OF VENT SYSTEM

 

3 FASTENERS

 

 

PER SIDE

 

CEILING FIRESTOP

CEILING FIRESTOP

INSTALLED BELOW CEILING

INSTALLED ABOVE CEILING

Figure 8.4

Installing the Attic Shield

 

Heatilator • Novus NDV Series • 4055-187 Rev. V • 1/12

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Hearth and Home Technologies 4055-187 Install the Ceiling Firestop, Ceiling firestop Must be used between floors and attics

4055-187 specifications

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