Installation guide

5. Horizontal Venting
Category I Furnaces With External Power
Venters
In order to maintain a Category ] classification of fan-assisted fur-
naces when vented horizontally with sidewall termination, a power
venter is REQUIRED to maintain a negative pressure in the vent-
ing system.
In the U.S.: Per the NFGC, a listed power venter may be used,
when approved by the authority having jurisdiction.
Vent Termination
Venting Through a Non-Combustible and
Combustible Wall
Consult External Power Venter manufacturer instructions.
Select the power venter to match the Btuh input of the furnace be-
ing vented. Follow all of the power venter manufacturer's installa-
tion requirements included with the power venter for:
• venting installation,
• vent terminal location,
In Canada: Only power venters approved by the appliance
manufacturer and where allowed by the authority having jurisdic-
tion may be used.
Please consult the Fields Controls Co. or Tjernlund Products, Inc.
for power venters certified for use with this furnaces.
• preventing blockage by snow,
• protecting building materials from degradation by flue gases,
• see Figure 5 for required vent termination.
NOTE: It is the responsibility of the installer to properly terminate
the vent and provide adequate shielding. This is essential in order
to avoid water/ice damage to building, shrubs and walkways.
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