www.fmiproducts.com
117437-01E 9
INSTALLATION PRECAUTIONS
NOTICE:Failureto follow thesein-
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protection
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or when on roof tops
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walls and ceilings
The following actions will void the warranty
on this product:
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component
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system (Do not cut or alter vent compo-
nents)
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manufactured or approved by FMI PROD-
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these instructions
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Failure to do so could result in
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VENTING INSTALLATION
A 4" B-type venting system must be connected
to the appliance for venting to the outside of
the building.
The following section is provided as a guide to
install a standard B-type vent installation.
Standing code requirements concerning
B-type vent installations may vary within
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check with your local building code authority
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rent National Fuel Gas Code NFPA 54/ANSI
Z223.1 for Category I systems using double
wall B-1 vent pipe.
This gas appliance must be vented to the
outdoors only and may not be terminated into
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a solid fuel burning appliance.
This appliance may be vented through a
manufactured chimney liner system if all are
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and/or building authorities.
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are typical of most B-vent installations and
code practices.
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Example 1: Shows the minimum allowable sys-
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low the 75% rule for lateral to total vertical sys-
tem height. Codes also allows only one offset
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total vertical height in this example represents
the minimum height of 8 feet and therefore the
allowable lateral is 6 feet when the 75% rule
applies. If the lateral length must exceed 75%
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with the Category I venting tables.
Example 2: Shows multiple offsets each at
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The total lengths of the two offsets are not
required to meet the 75% rule.
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inclination and therefore the lateral length at 10
feet of offset does not have to meet the 75%
allowable rule.
