8
Vertical Support (Wall Straps)
For proper installation, Wall Straps (WS) must be installed to support the Polyflue. Fasten using (2) #8 x 1”L
(M4.2 x 25mm) wood screw or equal by others) the zero clearance Wall Strap to wood structure (Fig 6) and insert
pipe through the hose clamps and draw tight (Fig 7). Maximum distance between Wall Straps is 16 feet (4.9m).
A Wall Strap is also required just below the roof deck for all vertical installations (Fig 8 & vertical termination
section). Never drill or screw through the Polyflue system.
Fire Stop
Wherever the vent passes through a ceiling or floor, a Fire Stop (FS) must be installed. To Install: slide the Fire
Stop onto the male end of the pipe that will be passing through the floor. Nail to either side of floor/ceiling board.
If installing the Fire Stop after the pipe has already been installed, then simply cut a seam in one of the four sides
and bend & wrap the Fire Stop around the existing pipe to nail it to the floor.
Horizontal Terminations
It is recommended to use Polyflue UV rated pipe that will be exposed to the outdoors. It is recommended to
follow the appliance manufacturer’s installation instructions for horizontal termination location requirements. Keep
flue discharge and air intake a minimum of 12” (305mm) above the highest anticipated snow level.
Single Rigid Pipe Horizontal Termination (white UV single wall pipe)
:
1. Cut hole in wall large enough to accommodate the Polyflue pipe. It is suggested to cut the hole slightly
larger than the nominal diameter, to allow installation & thermal movement
2. Install the pipe from the exterior to the interior.
3. Using exterior grade silicone sealant, create a seal around the wall opening and the pipe.
4. Optional: To prevent animal entry into the Polyflue pipe, install the optional screen termination (HVST).
To install, remove the pipe gasket and insert the screen into the pipe until it stops (Fig 9).
Concentric Horizontal Termination (white UV, Fig 10):
1. Cut hole in wall slightly larger than concentric pipe diameter.
2. Insert Concentric Termination Pipe (HCT) from exterior to the interior and seal in place after final
installation.
3. Utilize the relative Concentric Horizontal Termination Support bracket (HCTHS).
4. Connect the Twin Pipe to Concentric Adapter (CTA) to transition to single wall rigid flue gas and
combustion air vent pipes.
Figure 7
Figure 10
Figure 9
Figure 8
Figure 6
Additional wood
blocking may be
required
underneath the
roof deck
Summary of Contents for Polyflue BH
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