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3.3.4 Direct Vent Information
The unit must be connected to listed 2-ply aluminium venting, 4" flex vent on the exhaust side and
listed 7" flex vent on the air intake side or can be used with Security Venting or Simpson Dura-Vent 4"
x 6-5/8" with the use of Simpson Dura-Vent adapters part #'s 0924N3 & P574. Install the vent
components according to the manufacturer's instructions being sure to use spacers (see Figure 5)
every 5' to ensure correct spacing is maintained between air intake and exhaust. Slope horizontal
pipe at least 1/4" (6 mm) rise per foot of horizontal run. Allow 1" (25 mm) clearance to the vent.
Refer to the graph for allowable vent configurations. Be sure to ensure that termination area allows
enough room for adequate combustion and ventilation air and that the flow of combustion and
ventilation air is not obstructed.
Note: If at any time the vent-air intake piping is dismantled, use the vent manufacturer's
instructions and the sealing instructions for reassembly.
Figure 5
Page 15 of 80
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