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1. Unpack vent components and check all items for shipping
damage.
2. For this venting system to operate as designed it is dependent
on the use of all parts and procedures detailed in these in-
structions. Failure to follow these instructions may potentially
affect the performance of this vent system and the attached
appliance.
3. As per the fireplace manufacturer’s instructions, replace the
existing 6 5/8” diameter fireplace vent adapter with the 7”
diameter flex vent fireplace adapter included in the vent kit.
Install the adapter collar with the screws removed from the
standard fireplace collar. Refer to the fireplace manual for ad-
ditional information on the vent collar removal and installa-
tion.
4. Once the fireplace location has been determined, mark the
ceiling where the flex vent will pass through. Cut an opening
for installation of the firestop thimble assembly. The opening
must measure a minimum of 9-1/2” x 9-1/2” square.
see Fig-
ure 29.
5. Next, determine the location for the cutout in the roof opening.
This opening must be large enough to provide a minimum 1”
air space clearance from the vertical vent pipe to any combus-
tible framing.
6. Install the Firestop/Thimble assembly to the framed opening
in the ceiling using common nails or screws.
note:
The thimble assembly is adjustable up or down as
needed within the firestop. It is also designed with a pivoting
firestop for use with 0 - 3/12 pitch cathedral ceilings.
7. To begin vent system assembly, first layout all the vent com-
ponents on the floor in the order in which they will be assem-
bled.
8. Stretch the 4” diameter inner flex flue and 7” diameter outer
flex vent to the maximum length of 6 feet.
9. Install the spring spacers provided around the 4” diameter flex
flue at 1 foot intervals, then slide the flue pipe with spacers into
the 7” diameter outer flex vent pipe. Make sure the springs are
spaced evenly starting at 12 inches from the fireplace collar.
see Figure 30.
Figure 29
Figure 30
step-By-step installation For Flex Dv Kit
DvvK-4Fv Direct vent terMinAtiOn Kit (continued)
