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To complete the fresh air installation, you will need 3" insulated flexible pipe. Use the length
required for your installation while respecting the maximum length of 10 ft (3 m).
Make a 3 1/4" (83 mm) hole in the outside wall of the house at the chosen location. From
outside, place the outside air inlet cap in the hole (open side down) and fasten the register
to the wall, with screws as shown (see figure 35). Place the insulated pipe over the register
tube and over the fireplace outside air connector (see figure 36). At each end, carefully pull
back the insulation and plastic cover, exposing the flexible pipe. Attach the flexible pipe using
pipe clamps. For a better seal, you may also use aluminum tape. Wrap the tape around
the joint between the flexible pipe and the air inlets. Carefully push the insulation and plastic
cover back over the pipe. Fix the plastic in place using aluminum tape.
Figure 35
Figure 36
Hearthstone Quality Home Heating Products, Inc ®
35
WFP-75 Model 8410
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