DVP, SL-D and SL-Flex Series Venting:
STEP 4. Install Firestops
For Horizontal Runs - Firestops are REQUIRED on both sides of a combustible wall through which the vent passes.
NOTE: Model
To install firestops for horizontal runs that pass through either interior or exterior walls:
Cut a 12” x 10“ (305mm x 25mm) hole through the wall for
•Position the firestops on both sides of the hole previ- ously cut and secure the firestops with nails or screws.
•The heat shields of the firestops MUST BE placed to- wards the top of the hole.
•Continue the vent run through the firestops.
NOTE: There must be NO INSULATION or other combustibles inside the framed firestop opening.
10"
(254mm)
1" (25.4 mm)
12"(DVP) or 10" (SL) (305mm or 254mm)
VENT PIPE
Figure 24. Hole and Vent Pipe
HEAT SHIELD
TRIM HEAT SHIELD IF TOO LONG, ADD TO SHIELD IF TOO SHORT
EXTERIOR
FIRESTOP
INTERIOR
FIRESTOP
Figure 25. Heat Shield, Interior & Exterior Firestops
For Vertical Runs - One ceiling firestop is REQUIRED at the hole in each ceiling through which the vent passes.
To install firestops for vertical runs that pass through ceilings:
•Position a plumb bob directly over the center of the verti- cal vent component.
•Mark the ceiling to establish the centerpoint of the vent.
•Drill a hole or drive a nail through this centerpoint.
•Check the floor above for any obstructions, such as wir- ing or plumbing runs.
•Reposition the appliance and vent system, if necessary, to accommodate the ceiling joists and/or obstructions.
•Cut a
•Frame the hole with framing lumber the same size as the ceiling joists.
NOTE: There must be NO INSULATION or other combustibles inside the framed firestop opening.
10" (254mm) | 10" (254mm) | |
| ||
| CHIMNEY | |
| HOLE | |
NEW | EXISTING CEILING | |
JOISTS | ||
FRAMING | ||
| ||
MEMBERS |
| |
CEILING |
| |
Figure 26. Hole & New Framing Members | ||
34 | Heat & Glo • |
